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Vytran™ Fiber Cleavers for Ø80 µm to Ø1.25 mm Cladding Fibers


  • Cleave Glass Fibers with Cladding Diameters from 80 µm to 1.25 mm
  • Accepts SM, PM, MM, Capillary Tubes, PCF, Non-Circular Fiber, and Other Specialty Fibers
  • Programmable Cleave Parameters via Included Tablet

LDC401A

Fiber Cleaver with Rotation Module for Angled Cleaves

Included Tablet Controller Provides Easy-to-Use Interface for Operation

VHA25

VHE25

Top and Bottom Fiber Holder Inserts (Must be Purchased Separately)

Related Items


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LDC401A Cleaver
Click to Enlarge

A close-up of the cleave assembly on the LDC401A. A clamping screw on the top of each holding block can be tightened to provide extra clamping force for gripping fibers with outer diameters ≥500 µm. Magnets in each holding block provide sufficient force for clamping smaller fiber diameters.

Features

  • Cleave Glass Fibers with Claddings from Ø80 µm to Ø1.25 mm
  • Flat Cleaves or Angled Cleaves up to 15°
  • Programmable Processes for a Wide Variety of Fibers:
    • Single Mode, Multimode, and Polarization-Maintaining Fibers
    • Capillary Tubes*
    • Photonic Crystal Fiber (PCF)*
    • Microstructured Fibers*
    • Non-Circular Fibers
  • Touchscreen Tablet for Setting Cleave Parameters (See Tablet Controller Tab for Details)
  • Holding Blocks and Inserts are Compatible with Other Vytran™ Systems:

Build Your System

  • Large-Diameter Fiber Cleaver for Fibers with Claddings from Ø80 µm to Ø1.25 mm
  • Choose Top and Bottom Inserts (Two Top Inserts and Two Bottom Inserts are Required; See Fiber Holder Inserts Tab for More Information)

These Vytran™ Fiber Cleavers precisely cleave fibers with claddings from 80 µm to 1.25 mm in diameter. The LDC401 is designed to produce flat cleaves perpendicular to the length of the fiber, while the LDC401A has a rotation stage module for creating angled cleaves up to 15°.*

The cleavers use the "tension-and-scribe" cleaving process, where tension is applied along the length of the fiber followed by an automatic scribing process utilizing a diamond cleave blade. After the blade scribes the fiber, tension is maintained, causing the scribe to propagate across the fiber width and complete the cleave. The LDC401A accomplishes angled cleaves by using the rotation stage to apply torsion to the fiber prior to scribing; the cleave plane will be perpendicular to the maximum resultant stress created by the combined tension and torsion applied to the fiber.

The cleavers have settings to carry out an automated "sub-critical" scribe process designed to improve the cleave quality in specialty fibers, such as photonic crystal fiber (PCF), microstructured fibers, capillary tubes, or highly stressed fibers (multimode or polarization maintaining). Each cleaver is equipped with a flat-tipped micrometer backstop, which can help improve end-face quality when performing low-tension cleaves. See the Cleaving Guide tab for details.

The cleavers use a diamond blade for scribing the fiber. When used with proper cleave parameters, a single location on the blade can provide up to 5,000 cleaves (dependent on the cladding properties of the fiber being cleaved). The cleaver is designed so that the cleave blade can be repositioned approximately nine times before replacement (assuming proper cleave parameters and usage that does not cause unexpected damage to the blade). We only recommend using these cleavers with fibers that have a glass cladding; other materials, such as plastic, will rapidly degrade or damage the blade. Replacement blades are available separately below.

Accessories
The LDC401 and LDC401A are designed to accept Fiber Holder Inserts that can clamp a variety of outer diameters. Our selection of top and bottom inserts are available separately below, listed with the maximum fiber sizes accepted by each insert. The Fiber Holder Inserts tab has a selection guide to aid in choosing which pairs of fiber holder inserts are required based on the diameter of the fiber to be leaved. Two top and two bottom inserts are required to operate the fiber cleaver.

In addition to the large-diameter fiber cleavers, we offer the FPS300 Stripping and Cleaning Station, the LFS4100 Fiber Splicer, and the GPX3400 and GPX3600 Glass Fiber Processing Stations. Many of the fiber holder inserts that are compatible with the LDC401 and LDC401A are also compatible with these fiber processing systems, making it easy to move the fiber between stations.

* It may not be possible to create clean, angled cleaves in specialty fibers with large "air-fill" fractions due to the structural properties of the fiber.

Compatible Vytran™ Fiber Processing Systems
Fiber Preparation Station
(Strip and Clean)
Large-Diameter
Fiber Cleavers
Large-Diameter
Fiber Splicer
Automated Glass
Processing Systems
with Integrated Cleaver

(Cleave, Splice, and Taper)
Automated Glass
Processing Systems

(Splice and Taper)
Recoaters,
Proof Testers, and
Recoaters with Proof Testers
Specifications
Item # LDC401 LDC401A
Cleave Type Flat Cleave Flat Cleave or
Angleda Cleave up to 15°
Accepted Fiber Sizes Cladding: Ø80 µm to Ø1.25 mm
Buffer: Ø80 µm to Ø3.198 mm
Accepted Fiber Types SM, PM, MM, Specialty Fibers Including Microstructured Fiber,
Photonic Crystal Fiber (PCF), Non-Circular Fiber, and Capillary Tubes
Cleave Method Tension and Scribe
Tension 63.7 N (14.3 lbs) Max, Programmableb
Scribe Diamond Blade, Stepper Motor Controlled
(5000 Uses, 9 Positions)
Loading Linear Tension, Stepper Motor Controlled
Cleave Tolerance ±0.5° ±0.5° (Flat)
±1.0° (Angled)
Rotation Stage N/A 0.1° Resolution,
Stepper Motor Controlled
Fiber Holding Blocks Internal Vacuum Pump for Easier Loading,
Up to 9 inHg (4.4 psi) of Pressure
Fiber Holder Inserts Available Separately Below
Power 12.5 VDC, 5 A (Provided by External Power Supply)
External Power Supply 100 - 120 / 200 - 240 VAC, 4.5 / 2.2 A, 47 - 63 Hz
Dimensions (L x W x H)
without Holding Blocks or Rotation Stage
10.14" x 5.00" x 5.00"
(258 mm x 127 mm x 127 mm)
Dimensions (L x W x H) 10.14 " x 5.85" x 6.88"
(258 mm x 149 mm x 175 mm)
10.14" x 5.85" x 6.96"
(258 mm x 149 mm x 177 mm)
Weight 10.0 lbs (4.5 kg)
  • It may not be possible to create clean angled cleaves in specialty fibers with large "air-fill" fractions due to the structural properties of the fiber.
  • These cleavers are calibrated using standard weights that are hung off of a pulley, so the tension settings are programmed into the tablet controller in grams. This maximum tension corresponds to 6.5 kg.

Programmable Cleave Parameters

These large-diameter fiber cleavers are designed to provide easy operation when performing simple cleaves but still support customized processing for more complicated cleaves involving specialty fibers. A complete list of modifiable parameters is listed below. The majority of users will only need to enter the Fiber Diameter (cladding), Cleave Tension, and Pre-Cleave Advance while leaving the rest of the parameters set to their default values. To further simplify the process, the tablet controller features an autoset function that will estimate an appropriate Cleave Tension and Pre-Cleave Advance based on the fiber diameter, although these values can be adjusted by the user if necessary.

Fiber Cleaver Parameter Limits
Parameter Default Minimum Maximum
Fiber Diameter Fiber Size
Dependent
10 µm 1500 µm
Cleave Tensiona,b Fiber Size
Dependent
1 g 6500 g
Pre-Cleave Advance Fiber Size
Dependent
200 Steps
(300 µm)
400 Steps
(600 µm)
Set FHB Offset 0 mm 0 mm 47 mm
Tension Velocity 60 Steps/s
(48 µm/s)
4 Steps/s
(3.2 µm/s)
200 Steps/s
(160 µm/s)
Rotation Angle (LDC401A Only) 180°
Cleave Peck Cycles 60 10 250
Cleave Forward Steps 81 40 400
Cleave Back Steps 80 39 399
Scribe Delay 250 ms 1 ms 5000 ms
Set Blade Offset Unit Specific
Value
100 Steps
(150 µm)
2500 Steps
(3750 µm)
Sub-Critical Process Parametersc
Re-Tension Levela,d 10 g 1 g 100 g
Post-Scribe Pause 1.0 s 0.1 s 30.0 s
Re-Tension Pause 1.0 s 0.1 s 30.0 s
Re-Tension Limit 20% of Cleave
Tension
1% of Cleave
Tension
50% of Cleave
Tension
  • These cleavers are calibrated using standard weights that are hung off of a pulley, so the tension settings are programmed into the tablet controller in grams.
  • This corresponds to a range of tensions from 9.8 mN (0.0022 lbs) to 63.7 N (14.3 lbs).
  • These parameters only appear in the controller when the sub-critical process is enabled.
  • This corresponds to a range of tensions from 9.8 mN (0.0022 lbs) to 0.98 N (0.22 lbs). The default value corresponds to 98 mN (0.022 lbs).

Tablet Controller Cleave Parameter Definitions

The definition of each of the parameters that can be entered into the tablet controller are described below.

Fiber Diameter: The diameter of the fiber cladding. This is also the fiber cleave parameter file name.

Cleave Tension: The load applied axially to the fiber prior to initiating the scribe process. These cleavers are calibrated using standard weights that are hung off of a pulley, so the tension settings are programmed into the tablet controller in grams. Possible settings correspond to a range of tensions from 9.8 mN (0.0022 lbs) to 63.7 N (14.3 lbs).

Pre-Cleave Advance: Before cleaving, the cleave blade must move closer to the fiber. The location of the blade just prior to cleaving is set using this parameter. One step corresponds to 0.00006" (1.5 µm).

Set FHB Offset: This stands for "Set Fiber Holding Block Offset". It is the distance that the left fiber holding block will be shifted to the left from the "home" position prior to loading the fiber. This allows the user to adjust the distance between the edge of the holding block and the cleave point.

Tension Velocity: The speed at which tension is applied to the fiber prior to cleaving. One step corresponds to 0.00003125" (0.8 µm).

Cleave Peck Cycles: To properly cleave the fiber, the cleave blade will ideally make one single, quick contact with the fiber. In order to achieve this, the blade will begin to oscillate forward and backwards after the pre-cleave advance distance has been traveled. This parameter sets the total number of oscillations that will occur during the cleave process.

Cleave Forward Steps: This parameter controls how far the blade moves towards the fiber during the "forward" portion of the cleave peck cycle. One step corresponds to 0.00006" (1.5 µm).

Cleave Back Steps: This parameter controls how far the blade moves away from the fiber during the "backward" portion of the cleave peck cycle. One step corresponds to 0.00006" (1.5 µm).

Scribe Delay: This is the delay in milliseconds between each cleave peck cycle. It provides time for the scribe to propagate across the fiber, completing the cleave, before the blade moves forward again. This helps prevent the blade from contacting the fiber more than once.

Set Blade Offset: Adjusts the position that the blade returns to after homing. This allows the starting point for the pre-cleave advance and subsequent cleave peck cycles to be globally adjusted. One step corresponds to 0.00006" (1.5 µm).


Special Sub-Critical Process Parameters

During the Sub-Critical Process, additional tension is applied to the fiber after the scribe occurs.

Post-Scribe Pause: The time, in seconds, between the last oscillation of the cleave blade and the first increase in tension applied to the fiber.

Re-Tension Pause: The time between subsequent increases in the tension applied to the fiber (all increases in tension after the first one, which occurs after the Post-Scribe Pause).

Re-Tension Level: The tension is increased incrementally after the scribe. This is the amount by which the tension is increased after the Post-Scribe Pause and each Re-Tension Pause. These cleavers are calibrated using standards weights that are hung off of a pulley, so the tension settings are programmed into the tablet controller in grams. Possible settings correspond to a range of tensions from 9.8 mN (0.0022 lbs) to 0.98 N (0.22 lbs).

Re-Tension Limit: The maximum amount of additional tension that will be applied to the fiber as a percentage of the original tension.

Fiber Holder Insert Selection Guide

Fiber Holder Inserts, which are designed to hold various sized fibers within the cleaver, must be purchased separately. The bottom inserts have V-grooves to hold the fiber, while the top inserts each feature a recessed, flat surface that clamps the fiber against the V-groove in the bottom insert. Each top and bottom insert is sold individually, as the fiber diameter clamped by the left and right holding blocks may not be the same. Two top inserts and two bottom inserts are required to operate the cleaver.

The table below indicates the maximum and minimum diameters that can be accommodated by different combinations of top and bottom inserts. It also indicates how far offset the fiber will be for recommended combinations of top and bottom inserts. Note that the fiber outer diameter may be the fiber cladding, jacket, or buffer. If one side of the fiber is being discarded, it is preferable to clamp onto the cladding of this section except in special cases (such as non-circular fiber) where the coating or buffer may be preferable. Sections of fiber that are not being discarded should always be clamped on the coating or buffer in order to avoid damaging the glass. This may require different sets of fiber holder inserts to be used in the left and right holding blocks. In this case, it is important to minimize the difference in the offsets introduced by the left and right sets of inserts when attempting to produce perpendicular, flat cleaves.

V-Groove Inserts
Each V-groove can accommodate a range of fiber sizes.
Legend
 
Best Fit
 
Second Best Fit: Try these options if the best fit does not incorporate your fiber sizes.
 
Third Best Fit: Try these options if the other two categories do not incorporate your fiber sizes.

Fiber Holder Insert Selection Chart

  1. First, select the bottom insert that matches your fiber size most closely.
    Example: For an Ø800 µm fiber, the VHD750 insert is the closest match, since it is only 50 µm smaller.
  2. On the chart below, look to the right of your chosen bottom insert. Select a compatible top insert based on the fiber diameter size range shown in each cell.
    Example: For the Ø800 µm example fiber from step 1, the green cell is in the 750 µm groove column for the VHA05 top insert which has two grooves. The numbers listed in the green cell indicate that this combination of inserts is good for fibers from 728 to 963 µm in diameter. Our Ø800 µm fiber is within this range, so this is a good choice. There are several other options as well that will accommodate an Ø800 µm fiber as well, but the green shading in the chart indicates that the 750 µm groove in the VHA05 provides the best fit. 
  3. The second line of numbers in each cell shows the range of offsets that can be expected for any given combination of top and bottom inserts. When selecting inserts for the right and left fiber holding blocks, try to minimize the offsets between the pairs of inserts on each side.
    Example: If we choose a VHD750 bottom insert and the Ø750 µm groove in the VHA05 top insert, we can use fiber as small as 728 µm, in which case the center of the fiber would sit 23 µm below the surface of the bottom insert. We could also clamp a fiber as large as 963 µm, in which case the center of the fiber would sit 213 µm above the surface of the bottom insert. We could interpolate to find the offset experienced by our hypothetical 800 µm fiber, but it turns out that in the 60° V-groove on these inserts, the offset is equal to the diameter difference. So in our example, that means that the center of our fiber is going to sit 50 µm above the bottom insert surface, since it is 50 µm larger than the fiber that the bottom insert was designed for (800 - 750 = 50).
  4. Holding blocks designed for fibers less than Ø1000 µm have vacuum holes, designed to aid in aligning small fiber within the groove, while bottom inserts for fibers of Ø1000 µm or larger do not have these holes. The LDC4010 and LDC401A each have a vacuum pump that provides a small holding force via these holes, keeping small fibers in place as the clamps are lowered. Inserts with vacuum holes are indicated by a superscript "b" in the table below.
Top Insert Item # VHA00a VHA05a VHA10a VHA15a VHA20a VHA25 VHA30
Accepted Diameter (Nominal) ≤320 µm 400 µm 500 µm 750 µm 1000 µm 1250 µm 1500 µm 1750 µm 2000 µm 2250 µm 2500 µm 3000 µm
Bottom
Insert
Item #
Accepted
Diameter
(Nominal)
Min / Max Accepted Fiber Diameter (µm)
Min / Max Fiber Offset (µm)
VHD080b 80 µm 57 / 100
-23 / 21
- - - - - - - - - - -
VHD125b 125 µm 88 / 161
-37 / 36
- - - - - - - - - - -
VHD160b or
VHF160b,c
160 µm 112 / 208
-49 / 48
- - - - - - - - - - -
VHD250b or
VHF250b,c
250 µm 177 / 320
-73 / 69
275 / 323
25 / 74
- - - - - - - - - -
VHD400b or
VHF400b,c
400 µm 279 / 519
-122 / 119
377 / 517
-23 / 117
410 / 519
-9 / 119
- - - - - - - - -
VHD500b or
VHF500b,c
500 µm 346 / 592
-153 / 93
447 / 647
-53 / 147
476 / 711
-24 / 211
560 / 795
61 / 296
- - - - - - - -
VHD750b or
VHF750b,c
750 µm 516 / 759
-234 / 9
617 / 970
-132 / 221
643 / 878
-107 / 128
728 / 963
-23 / 213
812 / 1047
62 / 297
- - - - - - -
VHE10a 1000 µm - - 773 / 1008
-172 / 63
858 / 1093
-88 / 147
943 / 1178
-3 / 232
1036 / 1271
90 / 325
- - - - - -
1250 µm - - - 1034 / 1269
-176 / 59
1119 / 1354
-91 / 144
1212 / 1447
2 / 237
1288 / 1523
78 / 313
- - - - -
VHE15a 1500 µm - - - - 1280 / 1515
-172 / 63
1373 / 1608
-79 / 156
1449 / 1684
-2 / 233
1534 / 1769
82 / 314
- - - -
1750 µm - - - - - 1534 / 1770
-159 / 76
1611 / 1846
-83 / 152
1695 / 1930
2 / 237
1772 / 2007
78 / 313
- - -
VHE20a 2000 µm - - - - - - 1787 / 2022
-171 / 64
1871 / 2106
-86 / 149
1947 / 2183
-10 / 225
2032 / 2267
74 / 309
- -
2250 µm - - - - - - - 2033 / 2268
-167 / 68
2109 / 2344
-91 / 144
2193 / 2429
-6 / 229
2278 / 2513
78 / 313
-
VHE25 2500 µm - - - - - - - - 2270 / 2505
-172 / 64
2355 / 2590
-87 / 148
2439 / 2675
-2 / 233
2609 / 2844
167 / 402
VHE30 3000 µm - - - - - - - - - 2692 / 2944
-256 / -4
2777 / 3029
-171 / 81
2946 / 3198
-2 / 250
  • These inserts have two grooves, one on each side, that each accommodate a different range of fiber sizes, except for the VHA00, which has a flat surface on one side that can be used to clamp the smallest fiber sizes.
  • These bottom inserts have vacuum holes to aid in aligning small fibers when used with the large-diameter fiber cleavers.
  • These are transfer inserts. When used with the VHT1 transfer clamp, they allow the fiber to be transferred between compatible stripping, cleaning, cleaving, splicing, and tapering stations without losing registration of the fiber tip location relative to the edges of the fiber holding block.

Tension-and-Scribe Cleave Process

Tension and Scribe Method
Click to Enlarge

An illustration of the tension-and-scribe method as used by the LDC401 and LDC401A to produce a flat cleave. Tension is applied along the optical axis of the fiber prior to cleaving. A diamond blade then scribes the fiber, and the tension causes the scribe to propagate across the fiber in a plane that is orthogonal to the direction of the tension.
Tension and Scribe Method
Click to Enlarge

An illustration of the tension-and-scribe method as used by the LDC401A to produce an angled cleave. Tension and torsion are applied simultaneously to the fiber prior to cleaving. When the blade scribes the fiber, the scribe propagates across the fiber orthogonally to the direction of the maximum resultant stress produced by the combined tension and torsion, producing an angled cleave.

Tension-and-Scribe Cleave Process

The LDC401 cleavers use the "tension-and-scribe" cleaving process, where tension is applied along the length of the fiber followed by an automatic scribing process utilizing a diamond blade. After the blade scribes the fiber, tension is maintained, causing the scribe to propagate across the fiber width and complete the cleave. Angled cleaves are accomplished in the LDC401A by using the rotation stage to apply torsion to the fiber, starting prior to commencing the "tension-and-scribe" process. The cleave plane will then be perpendicular to the maximum resultant stress created by the combined tension and torsion applied to the fiber.

Sub-Critical Process for Cleaving Specialty Fibers

Certain specialty fibers, such as photonic crystal fiber (PCF), microstructured fibers, capillary tubes, or highly stressed fibers (multimode or polarization maintaining) may require special parameters in order to create clean cleaves at the desired angle. These Vytran™ fiber cleavers can be programmed with a "sub-critical" cleave process in order to produce high-quality cleaves for these fiber types.

For these cleaves, the initial tension applied to the fiber is lower than what would be required for the standard "tension-and-scribe" process. The included micrometer backstop prevents the fiber from bending when it is scribed at this lower tension. After the scribe, the tension is slowly, incrementally increased, which serves to propagate the scribe across the fiber and complete the cleave. Parameters for this process can be adjusted using the tablet controller, including the starting and ending tension and how fast the tension is increased after the initial scribe.

Cleaving Guide

The following information is intended to provide a starting point when selecting the best process to use for cleaving different types of fiber. To achieve the best possible cleave results, further experimentation is typically required to fine-tune the cleave parameters for each specific fiber type.

Standard Process: The tension-and-scribe method where a constant tension is applied to the fiber, the fiber is scribed, and the tension causes the scribe to propagate across the fiber to produce the cleave.

Sub-Critical Process: This process starts with a lower tension applied to the fiber than required by the standard cleaving process. After the fiber is scribed, the tension is slowly increased until the scribe propagates across the fiber and the cleave is complete. This can improve the cleave quality in highly stressed or specialty fibers.

Micrometer Backstop: The tip of the micrometer is positioned so that it just touches the fiber, providing a surface that prevents the fiber from deforming when contacted by the cleave blade during scribing. It is particularly useful when cleaving large-diameter fibers or when using the lower-tension sub-critical process.

Fiber Type Cleave Type Standard Process Sub-Critical Process Micrometer Backstop
Fiber with Cladding <Ø800 µm Flat or Angleda YES! - -
Fiber with Cladding ≥Ø800 µm Flat or Angleda YES! May Be Necessary Use if the Cleave Blade is Pushing
the Fiber Forwards without Cleaving
Multimode Fiber Flat YES! - -
Angleda - YES! Use if Fiber Cladding is >Ø400 µm
Thick-Walled Capillary Tubing
(Wall Thickness at Least 10% of Diameter)
Flat or Angleda - - YES!
Thin-Walled Capillary Tubing
(Wall Thickness <10% of Diameter)
Flat or Angleda - YES! YES!
PM Fiber Flat Use if Fiber Cladding is ≤Ø400 µm Use if Fiber Cladding is >Ø400 µm YES!
Angleda - YES! YES!
PCF Flat or Angleda - YES! YES!
  • Only the LDC401A can be used to produce angled cleaves.

Tablet Controller GUI Interface

Each LDC401 and LDC401A includes a touchscreen tablet controller, which provides a simple interface for configuring, controlling, and monitoring cleaver operation. The screenshots below highlight key features of the graphical user interface. Additionally, the user can enter passwords and set permissions, allowing only authorized users to access and change the LDC401 or LDC401A settings. The controller can be operated in one of four languages: English, French, Russian, or Chinese.

LDC401 Home Screen
Click to Enlarge

Home Screen
The LDC401 home screen provides a status bar, tool bar, start button, and a button to view or edit the parameters. The symbols on the right of the screen make up the LDC Widget.
Top row, left to right: left FHB inserts, FHB offset in mm, cleave blade index, cleave counter, right FHB inserts, rotation angle.
Bottom row, left to right: target tension, fiber cladding and jacket diameter, micrometer backstop position, regular or sub-critical cleave, ready/busy indicator.
Parameter Selection Screen
Click to Enlarge

Cleave Parameters
This screen allows the user to access and change all cleave parameters. The current setting is displayed next to the parameter name.

Click to Enlarge

Cleave Process Screen
Once the cleave process is started, the Cleave Screen is displayed. This screen updates dynamically as the cleave sequence progresses. A typical sequence consists of loading the fiber, pulling tension, cleaving the fiber, and then unloading (although the user can go straight to the tension stage by pressing start when the left FHB lid is closed). This screen shows the LDC widget, allowing the user to make final adjustments to parameters before the cleave.
Auto Parameters
Click to Enlarge

Automatic Settings
Auto Parameter will generate a basic set of suggested theoretical cleave parameters based on the Fiber Diameter (and if required, the Desired Cleave Angle). The user can edit each parameter by touching the item in the list.
LDC401 Motor Control
Click to Enlarge

Motor Control
This window allows the user to adjust the desired position of the fiber holding block, either by typing in a new setting, using the slider, or using the arrow buttons beneath the slider. While this window is for the fiber holding block, similar windows are available to set the position of the motor that drives the cleave blade and the rotation stage for angle cleaves (LDC401A only).
LDC401 Blade Service
Click to Enlarge

Blade Service
The blade service window allows the user to move the blade between its service position and its home position. The screen includes a list of the parameters needed to manage the blade setup. The cleave counter counts the number of cleaves performed by the blade in a given position. Each time the blade is replaced or moved so that a new part of the blade is in use, the cleave counter should be reset to zero and the cleave blade index incremented by 1. These can be done by tapping the boxes next to "Cleave Blade Index" and "Cleave Counter."

Product Demonstrations

Thorlabs has demonstration facilitates for the Vytran™ fiber glass processing systems offered on this page within our Morganville, New Jersey; Shanghai, China; and Exeter, Devonshire offices. We invite you to schedule a visit to see these products in operation and to discuss the various options with a fiber processing specialist. Please schedule a demonstration at one of our locations below by contacting technical support. We welcome the opportunity for personal interaction during your visit!

Thorlabs Vytran Europe
Exeter, United Kingdom

2 Kew Court
Exeter EX2 5AZ
United Kingdom

Appointment Scheduling and Customer Support

Thorlabs' Exeter Office
Click to Enlarge

Thorlabs China
Shanghai, China

Room A101, No.100, Lane 2891, South Qilianshan Road
Shanghai 200331
China

Appointment Scheduling and Customer Support

Thorlabs' China Office
Click to Enlarge

Thorlabs Vytran USA
Morganville, New Jersey, USA

1400 Campus Dr
Morganville, NJ 07751
USA

Appointment Scheduling and Customer Support

Thorlabs' Morganville Office
Click to Enlarge


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Fiber Cleaver for Ø80 µm to Ø1.25 mm Cladding Fibers

Components

Included

  • LDC401 or LDC401A
  • Tablet Controller and Tablet Stand
  • 12 V Power Supply
  • Location-Specific AC Power Cord
  • Nylon Brush
  • 0.035", 0.050", and 3/32" Hex Keys

Must be Purchased Separately

  • Fiber Holder Top Inserts (Two Required)
  • Fiber Holder Bottom Inserts (Two Required)
  • Cleave Fibers with Claddings from Ø80 µm to Ø1.25 mm
    • LDC401: Flat Cleaves Only
    • LDC401A: Flat Cleaves or Angled Cleaves up to 15°
  • Accepts SM, MM, PM, and Specialty Fibers
  • Includes Micrometer Backstop to Support Low-Tension Cleave Processes
  • Diamond Cleave Blade
  • Fiber Holder Inserts Must be Purchased Separately (Available Below)

The Vytran™ LDC401 and LDC401A Fiber Cleavers produce high-quality cleaves in fibers with claddings from Ø80 µm to Ø1.25 mm in order to support precision splicing applications. The LDC401 produces flat cleaves (i.e., a cleave plane perpendicular to the length of the fiber), while the LDC401A can produce both flat and angled cleaves. Each cleaver features a diamond cleave blade, a micrometer backstop that enables low-tension cleaves in specialty fibers, and a ruler block and translating fiber holding blocks to align the point to be cleaved. The LDC401A also includes a rotary stage to apply the torsion needed for angled cleaves. 

The left fiber holding block is connected to the same motorized stage as is used in our linear proof testers and includes a load cell that allows the system to internally monitor the tension applied to the fiber during the cleave process. The position of this holding block can be adjusted prior to cleaving by entering the desired position, with micron-level precision, into the tablet controller (display units are in millimeters).

The tablet included with each cleaver allows the parameters of the cleave process to be precisely controlled. Adjustable settings include the fiber tension, rotation angle, velocity at which the tension and torsion are applied to the fiber, how quickly the scribe approaches the fiber, and fiber diameter. A cleave angle calculator, included in the LDC401A tablet, provides an estimate of cleave parameters that can be refined by the user. The tablet is shipped preloaded with ten files for common cleave parameters. See the Tablet Controller tab for details.

Once the desired cleave parameters are set and loaded into the cleaver, the tablet can be removed and the cleaving process initiated by pressing the blue button on the top of the unit. For manufacturing environments with multiple cleaving stations, this feature streamlines the production process by allowing the same cleave parameters to be easily loaded into multiple LDC401 cleavers.

These cleavers use fiber holding blocks that are compatible with the FPS300 Stripping and Cleaning StationLFS4100 Fiber Splicer, and GPX3000 Glass Fiber Processing Stations, allowing fiber to be moved easily between systems. Fiber Holder Inserts are available below in a variety of sizes and must be purchased separately. A selection guide is provide on the Fiber Holder Inserts tab to aid in determining which inserts are appropriate for the fiber to be cleaved.

Each unit is shipped with a power supply and location-specific power cord.

Note: Due to the unit's design, it is not possible to upgrade an LDC401 to perform angled cleaves.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available / Ships
LDC401 Support Documentation
LDC401NEW!Large-Diameter Fiber Cleaver, Ø80 µm to Ø1.25 mm Cladding, Flat Cleaves
$10,800.00
Lead Time
LDC401A Support Documentation
LDC401ANEW!Large-Diameter Fiber Cleaver, Ø80 µm to Ø1.25 mm Cladding, Flat and Angled Cleaves
$12,850.00
Lead Time

Fiber Holder Top Inserts - Two Required

Fiber Holder Top Insertsa
Item # Side 1 Min/Max
Accepted Diameter
Side 2 Min/Max
Accepted Diameter
VHA00 57 µm / 759 µmb 275 µm / 970 µm
VHA05 410 µm / 1008 µm 560 µm / 1269 µm
VHA10 812 µm / 1515 µm 1036 µm / 1770 µm
VHA15 1288 µm / 2022 µm 1534 µm / 2268 µm
VHA20 1772 µm / 2505 µm 2032 µm / 2944 µm
VHA25 2278 µm / 3029 µm N/A
VHA30 2609 µm / 3198 µm N/A
  • Please see the Fiber Holder Inserts tab for information on how to match top and bottom inserts to achieve the best cleave quality.
  • This side of the VHA00 is flat to provide additional clamping force for fibers with very small diameters.

The large-diameter fiber cleavers require a pair of Top and Bottom Fiber Holder Inserts to be placed in each of the fiber holding blocks in order to clamp the fiber during the cleaving process. Each top insert consists of a bar that has a recessed area on one or both sides, designed to clamp the fiber against the V-groove in a bottom insert. The inserts sit in the top section of the fiber holding blocks and are available in a variety of groove sizes. Top inserts are sold individually, and two are required to use these cleavers.

The top and bottom inserts (available below) can be paired in different combinations, outlined on the Fiber Holder Inserts tab above, to accommodate fiber with outer diameters from 57 µm to 3.198 mm. 

While the cleavers can only cleave fibers with cladding diameters from 80 µm up to 1.25 mm, the inserts can accommodate a wider range of outer diameters, as there are cases where the fiber should be clamped on the coating instead of the cladding. During a typical cleave, it is often desirable to clamp the cladding on the side to be discarded and the coating on the side of the fiber that will be retained. Alternatively, the fiber may be center stripped and the coating clamped on both sides (preferable in some cases, such as creating a firm clamp on non-circular fiber). Therefore, multiple combinations of top and bottom inserts may be required to accommodate all of the diameters that need to be clamped. The Fiber Holder Insert tab above includes information and a table to aid in selecting the correct combinations of top and bottom inserts to accommodate fiber outer diameters between 57 µm and 3.198 mm. 

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available / Ships
VHA00 Support Documentation
VHA00Dual-Sided Fiber Holder Top Insert, Ø57 µm - Ø970 µm
$159.00
Today
VHA05 Support Documentation
VHA05Dual-Sided Fiber Holder Top Insert, Ø410 µm - Ø1269 µm
$159.00
Today
VHA10 Support Documentation
VHA10Dual-Sided Fiber Holder Top Insert, Ø812 µm - Ø1770 µm
$159.00
Today
VHA15 Support Documentation
VHA15Dual-Sided Fiber Holder Top Insert, Ø1288 µm - Ø2268 µm
$159.00
Today
VHA20 Support Documentation
VHA20Dual-Sided Fiber Holder Top Insert, Ø1772 µm - Ø2944 µm
$159.00
Today
VHA25 Support Documentation
VHA25Fiber Holder Top Insert, Ø2278 µm - Ø3029 µm
$159.00
Today
VHA30 Support Documentation
VHA30Fiber Holder Top Insert, Ø2609 µm - Ø3198 µm
$159.00
Today

Fiber Holder Bottom Inserts - Two Required

Fiber Holder Bottom Insertsa
Item # Transfer
Insert
Side 1 Min/Max
Accepted Diameter
Side 2 Min/Max
Accepted Diameter
Vacuum
Holes
VHD080 No 57 µm / 100 µm N/A Yes
VHD125 No 88 µm / 161 µm N/A Yes
VHD160 No 112 µm / 208 µm N/A Yes
VHF160 Yesb
VHD250 No 177 µm / 323 µm N/A Yes
VHF250 Yesb
VHD400 No 279 µm / 519 µm N/A Yes
VHF400 Yesb
VHD500 No 346 µm / 795 µm N/A Yes
VHF500 Yesb
VHD750 No 516 µm / 1047 µm N/A Yes
VHF750 Yesb
VHE10 No 773 µm / 1271 µm 1034 µm / 1523 µm No
VHE15 No 1280 µm / 1769 µm 1534 µm / 2007 µm No
VHE20 No 1787 µm / 2267 µm 2033 µm / 2513 µm No
VHE25 No 2270 µm / 2844 µm N/A No
VHE30 No 2692 µm / 3198 µm N/A No
  • Please see the Fiber Holder Inserts tab for information on how to match top and bottom inserts to achieve the best cleave quality.
  • If using these cleavers with other compatible Vytran™ systems, a transfer insert may be used in place of the standard bottom insert. Combined with the VHT1 transfer clamp, the transfer inserts allow the fiber to be moved between compatible Vytran™ stations while maintaining coarse alignment.
  • Two are Required to Use the LDC401 or LDC401A
  • Clamp Fiber Outer Diameters from 57 µm to 3.198 mm when Used with Top Inserts (Available Above)
  • VHD and VHF Series of Inserts Have Holes for Vacuum Suction to Aid in Positioning Small Fibers when Used in the LDC401 or LDC401A (See the Table to the Right)
  • VHF Transfer Inserts are Used with VHT1 Transfer Clamp to Aid in Transferring a Fiber with ≤Ø1.047 mm Coating between Compatible Vytran™ Systems
  • Interchangeable by the User

The large-diameter fiber cleavers require a pair of Top and Bottom Fiber Holder Inserts to be placed in each of the fiber holding blocks in order to clamp the fiber during the cleaving process. Each bottom insert has a V-Groove on one or both sides that can accommodate a range of diameters (as indicated in the table to the right).

Three types of bottom inserts are available for these large-diameter fiber cleavers. Standard bottom inserts for fiber with an outer diameter <Ø1.047 mm have vacuum holes to help position the fiber in the groove when loading the cleaver. For certain fiber diameters, we also offer transfer inserts (Item #s beginning with VHF) designed to work with the VHT1 transfer clamps (available below) that aid in moving the fiber between compatible Vytran™ stations while maintaining coarse alignment. The VHE series of fiber holder bottom inserts have a V-Groove on one (VHE25 and VHE30) or both sides (VHE10, VHE15, and VHE20) but do not include vacuum holes. The VHF transfer inserts and VHE bottom inserts can both be installed in other, compatible Vytran™ stations, although the VHE bottom inserts cannot be used with the VHT1 transfer clamp.

Bottom inserts are sold individually, and two are required to use the large-diameter cleavers. If using the fiber cleaver as a stand-alone device, the VHD series or VHE series inserts will be sufficient. If using the cleavers with other compatible Vytran™ systems, the bottom insert in the left fiber holding block can be replaced with a transfer insert and VHT1 transfer clamp (available below) for certain fiber sizes, as indicated in the table to the right. Typically, these transfer inserts would only be used in the left fiber holder block, as the right fiber holding block usually clamps the side of the fiber that will be discarded. The right fiber holding block of the LDC401 can accept transfer inserts, if desired, while the right fiber holding block of the LDC401A is incompatible with the transfer inserts, due to the presence of the rotation stage.

The top (available above) and bottom fiber holder inserts can be paired in different combinations, outlined on the Fiber Holder Inserts tab above, to accommodate fiber with outer diameters from 57 µm to 3.198 mm. While the cleavers can only cleave fibers with cladding diameters from 80 µm up to 1.25 mm, the inserts can accommodate a wider range of outer diameters, as there are cases where the fiber should be clamped on the coating instead of the cladding. During a typical cleave, it is often desirable to clamp the cladding on the side to be discarded and the coating on the side of the fiber that will be retained. Alternatively, the fiber may be center stripped and the coating clamped on both sides (preferable in some cases, such as creating a firm clamp on non-circular fiber). Therefore, multiple combinations of top and bottom inserts may be required. The Fiber Holder Inserts tab above includes information and a table to aid in selecting the correct combinations of top and bottom inserts to accommodate fiber outer diameters from 57 µm to 3.198 mm.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available / Ships
VHD080 Support Documentation
VHD080Fiber Holder Bottom Insert, Ø57 µm - Ø100 µm
$199.00
Today
VHD125 Support Documentation
VHD125Fiber Holder Bottom Insert, Ø88 µm - Ø161 µm
$199.00
Today
VHD160 Support Documentation
VHD160Fiber Holder Bottom Insert, Ø112 µm - Ø208 µm
$199.00
Today
VHF160 Support Documentation
VHF160Fiber Holder Transfer Bottom Insert, Ø112 µm - Ø208 µm
$296.00
Today
VHD250 Support Documentation
VHD250Fiber Holder Bottom Insert, Ø177 µm - Ø320 µm
$199.00
Today
VHF250 Support Documentation
VHF250Fiber Holder Transfer Bottom Insert, Ø177 µm - Ø320 µm
$296.00
Today
VHD400 Support Documentation
VHD400Fiber Holder Bottom Insert, Ø279 µm - Ø519 µm
$199.00
Today
VHF400 Support Documentation
VHF400Fiber Holder Transfer Bottom Insert, Ø279 µm - Ø519 µm
$296.00
Today
VHD500 Support Documentation
VHD500Fiber Holder Bottom Insert, Ø346 µm - Ø795 µm
$199.00
Today
VHF500 Support Documentation
VHF500Fiber Holder Transfer Bottom Insert, Ø346 µm - Ø795 µm
$296.00
Today
VHD750 Support Documentation
VHD750Fiber Holder Bottom Insert, Ø516 µm - Ø1047 µm
$199.00
Today
VHF750 Support Documentation
VHF750Fiber Holder Transfer Bottom Insert, Ø516 µm - Ø1047 µm
$296.00
Today
VHE10 Support Documentation
VHE10Dual-Sided Fiber Holder Bottom Insert, Ø773 µm Ø1523 µm
$199.00
Today
VHE15 Support Documentation
VHE15Dual-Sided Fiber Holder Bottom Insert, Ø1280 µm - Ø2007 µm
$199.00
Today
VHE20 Support Documentation
VHE20Dual-Sided Fiber Holder Bottom Insert, Ø1787 µm - Ø2513 µm
$199.00
Today
VHE25 Support Documentation
VHE25Fiber Holder Bottom Insert, Ø2270 µm - Ø2844 µm
$199.00
Today
VHE30 Support Documentation
VHE30Fiber Holder Bottom Insert, Ø2692 µm - Ø3198 µm
$199.00
Today

Fiber Transfer Clamp and Graphite V-Grooves - Required for VHF Transfer Bottom Inserts

Graphite V-Groovesa
Item # Accepted Diameter
(Min / Max)
VHG125L 80 µm / 125 µm
VHG200 150 µm / 200 µm
VHG250 200 µm / 250 µm
VHG300 250 µm / 300 µm
VHG350 300 µm / 350 µm
VHG400 350 µm / 400 µm
VHG450 400 µm / 450 µm
VHG500 450 µm / 500 µm
VHG550 500 µm / 550 µm
  • Graphite V-grooves are not required for fibers with diameters larger than 550 µm.

These Transfer Clamps and V-Grooves are used with the VHF Transfer Bottom Inserts sold directly above to move a single fiber between various Vytran™ systems with minimal loss of alignment. For example, a fiber can be placed in a transfer insert and cleaved using the LDC401. Then, the entire transfer insert and fiber can be moved to a splicer or glass processor for splicing.

The VHT1 clamp secures transfer inserts with a magnetic lid that prevents axial movement of the fiber and can be used to hold the insert during transport without touching the fiber itself. For fibers with diameters ≤550 µm, a graphite V-groove is available to support the fiber when splicing (please see the size table to the right for more information). The graphite V-grooves are secured by tightening two setscrews on the transfer insert.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available / Ships
VHT1 Support Documentation
VHT1Transfer Clamp with Magnetic Lid for Fiber Holder Transfer Inserts
$230.00
Today
VHG125L Support Documentation
VHG125LExtended Graphite V-Groove, Ø80 µm - Ø125 µm
$143.00
Today
VHG200 Support Documentation
VHG200Graphite V-Groove, Ø150 µm - Ø200 µm
$133.00
Today
VHG250 Support Documentation
VHG250Graphite V-Groove, Ø200 µm - Ø250 µm
$133.00
Today
VHG300 Support Documentation
VHG300Graphite V-Groove, Ø250 µm - Ø300 µm
$133.00
Today
VHG350 Support Documentation
VHG350Graphite V-Groove, Ø300 µm - Ø350 µm
$133.00
Today
VHG400 Support Documentation
VHG400Graphite V-Groove, Ø350 µm - Ø400 µm
$133.00
Today
VHG450 Support Documentation
VHG450Graphite V-Groove, Ø400 µm - Ø450 µm
$133.00
Today
VHG500 Support Documentation
VHG500Graphite V-Groove, Ø450 µm - Ø500 µm
$133.00
Today
VHG550 Support Documentation
VHG550Graphite V-Groove, Ø500 µm - Ø550 µm
$133.00
Today

Replacement Diamond Cleave Blade

Compatible Systems

  • FPC200 Fiber Preparation Station
  • CAC400 and CAC400A Fiber Cleavers
  • LDC401 and LDC401A Fiber Cleavers
  • GPX3800 and GPX3850 Automated Glass Processors with Cleavers
  • FFS2000 and FFS2000PT Fiber Preparation and Splicing Workstations
  • FFS2000PM and FFS2000WS Fiber Preparation, Splicing,
    and Proof Testing Workstations
  • Former Generation LDC-200 Fiber Cleaver
  • Replacement Blade for Our Fiber Cleaving Systems (See List to the Right)
  • 0.08" (2.0 mm) Long Diamond Blade
  • User Installable
Vytran Replacement Cleave Blade
Click to Enlarge

The blade is shipped in a protective covering.

The ACL83 Diamond Cleave Blade is a replacement blade for the Vytran™ fiber processing systems listed to the right. Each system is shipped with a blade included.

When used with proper cleave parameters, a single location on the blade can provide up to 5,000 cleaves (dependent on the cladding properties of the fiber being cleaved). The blade can be positioned approximately 10 times before replacement (assuming proper cleave parameters and usage that does not cause unexpected damage to the blade). Blade replacement instructions for each system are provided in the user manuals.

Note: Severe damage to the blade can occur if conditions cause high stress perpendicular to the edge of the blade or if incorrect parameters are used to cleave the fiber. 

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available / Ships
ACL83 Support Documentation
ACL83Replacement Diamond Cleave Blade
$612.00
Today
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