Multimode Fiber and Patch Cables with Lensed Tips
- Graded-Index Multimode Fiber with Lensed Tip
- Focuses to Ø25 µm Spot at 30 µm Working Distance
- Available as Bare Fiber or Patch Cable
- Custom Versions Available
LFM100
Lensed Tip
Scissor Cut
Application Idea
LFM100 Lensed Fiber Mounted in a MBT616D 3-Axis Stage and HFF001 Fiber Clamp for Use in a Fiber Coupling Application
FC/PC Connector
SMA Connector
LFM1F-1
LFM1S-1
Lensed Tip
Lensed Tip
Please Wait
Key Specificationsa | ||
---|---|---|
Fiber Typeb | GIF50E | |
Wavelength Range | 800 - 1600 nm | |
Focused Spot Size | Ø25 µm (Typ.) | |
Working Distance | 30 µm (Typ.) | |
GIF50E Fiber Specificationsc | ||
Numerical Aperture | 0.200 ± 0.015 | |
Core Diameter | 50.0 ± 2.5 µm | |
Cladding Diameter | 125 ± 1 µm | |
Coating Diameter | 242 ± 5 µm |
Click to Enlarge
Comparison of Beam Output for Flat-Cleaved Tip and Lensed Tip
Features
- GIF50E Graded-Index Multimode Fiber with Lensed Tip
- Focus Light to Ø25 µm Spot at 30 µm Working Distance
- Available as Bare Fiber or Patch Cable
- Patch Cables are FC/PC (2.0 mm Narrow Key) or SMA905 Terminated on One End
- Useful for Waveguide and Photodiode Coupling Applications
- Manufactured Using Vytran® Fiber Processing Technology
Thorlabs' Multimode Lensed Fiber is a graded-index multimode fiber (Item # GIF50E) with a shaped tip on one end. Unlike light emitted from a flat cleaved fiber tip that diverges immediately, a fiber with a lensed tip will focus the light at a point in front of the tip. Each fiber provides a Ø25 µm spot at a 30 µm working distance. Lensed fibers are useful for applications such as coupling to and from waveguides, active device pigtailing, and waveguide packaging.
This lensed-tip fiber is available from stock as either a 1 m length of bare fiber with one scissor-cut end or as a patch cable with a 2.0 mm narrow key FC/PC or SMA905 connector on one end. Patch cable versions are jacketed in Ø900 µm black Hytrel®* tubing. The lensed tip is shipped with a protective plastic sleeve to prevent physical damage. Prior to use, the plastic sleeve should be removed and the tip cleaned gently using compressed air.
Lensed fibers are fabricated using Vytran® glass processing technology. Precise heating of the fiber end face provides a high degree of control over the curvature of the lens. Thorlabs is able to leverage our fiber processing experience to create lensed fibers using single mode, multimode, and polarization-maintaining fiber; please contact Tech Support to inquire about custom lensed fibers for your application.
*Hytrel® is a registered trademark of DuPont Polymers, Inc.
Lensed Tip Specifications | ||
---|---|---|
Focused Spot Size | Ø25 µm (Typ.) | |
Working Distance | 30 µm (Typ.) | |
Taper Length | 410 µm | |
Radius of Curvature | 31 ± 1 µm | |
Insertion Loss | 0.2 dB (Typ.) |
Fiber Specificationsa | ||
---|---|---|
Fibera | ||
Fiber Typea | GIF50E | |
Wavelength Range | 800 - 1600 nm | |
Numerical Aperture | 0.200 ± 0.015 | |
Core Diameter | 50.0 ± 2.5 µm | |
Cladding Diameter | 125 ± 1 µm | |
Coating Diameter | 242 ± 5 µm | |
Core-Cladding Concentricity | ≤1.5 µm | |
Coating-Cladding Concentricity | ≤12 µm | |
Attenuation | ≤2.3 dB/km @ 850 nm ≤0.6 dB/km @1300 nm |
Physical Specifications | |||
---|---|---|---|
Item # | LFM100 | LFM1F-1 | LFM1S-1 |
Fiber Termination | Scissor Cut | FC/PC, 2.0 mm Narrow Key |
SMA905 |
Fiber Length | 1 m +0.10 m/-0.0 m | ||
Stripped Fiber Lengtha | 11 mm ± 1 mm | ||
Tubing | N/A | Ø900 µm Black Hytrel®b | |
Length without Tubingc | N/A | 5 ± 1 cm | |
Operating Temperature | -60 to 85 °C |
Posted Comments: | |
user
 (posted 2024-10-07 16:46:05.043) Hi, what are the tolerances for the spot size and working distance for the lensed fibres? Thanks. mgarodia
 (posted 2024-10-11 09:33:37.0) Thank you for reaching out to us. We do not have defined tolerances for the spot size and working distance for the lensed tip fibers since they are driven specifications that we do not control or measure, and also because they are dependent on the wavelength and on the launch conditions. I have reached out to you directly to discuss your application and possible alternatives. Angel Ortega
 (posted 2022-03-07 05:52:47.977) Hi,
I am looking for a lensed fiber with the FC connector working at 1550 nm, but a monomode one. Do you offer such product? or is it possible to fabricate it?.
Thanks in advance,
Ángel jgreschler
 (posted 2022-03-10 09:31:47.0) Thank you for reaching out to Thorlabs. At this time the only fibers Thorlabs provides with lensed tips are multimode items found on this product page. It is possible to fabricate a lensed tip with single mode fibers, I have reached out to you directly to discuss the application further. Gong-Ru Lin
 (posted 2020-08-08 02:27:08.28) Do you have this product with other aperture size like 10um or 15um and working distance like 25um or 20um or 15um? Thank you so much for your kind reply as we need these lensed urgently.
Prof. Gong-Ru Lin
National Taiwan University YLohia
 (posted 2020-08-10 09:45:41.0) Hello Gong-Ru, thank you for contacting Thorlabs. Custom products can be requested by emailing techsupport@thorlabs.com. I have reached out to you directly to discuss the feasibility of offering this. cheng chen
 (posted 2020-05-31 01:01:52.7) what is the chromatic. aberration of this fiber lens ? nbayconich
 (posted 2020-06-16 09:15:07.0) Thank you for contacting Thorlabs. We have not modeled the amount of chromatic aberrations created by these lensed fibers. I will reach out to you directly to discuss your application. Georgy Onishchukov
 (posted 2020-03-11 15:02:33.72) What is the NA of the focused beam? YLohia
 (posted 2020-03-17 02:00:18.0) Hello, due to comparable values for the core diameter, working distance. and focused spot size, measuring the NA is not quite straightforward for this fiber. I have reached out to you directly to discuss this further. |
- 1 m of GIF50E Fiber with Lensed Tip
- 11 ± 1 mm of Fiber, Stripped to Cladding, on End with Lensed Tip
- Other End is Scissor Cut
LFM100 Multimode Lensed-Tip Fiber is available from stock in 1 m lengths. The non-lensed, scissor-cut end can be spliced into a setup if desired, or terminated with a connector using Thorlabs' fiber termination kits.
- GIF50E Fiber Patch Cables with Lensed Tip
- 2.0 mm Narrow Key FC/PC or SMA905 Connector
- 1 m Length
- 11 ± 1 mm of Fiber, Stripped to Cladding, on End with Lensed Tip
- Ø900 µm Black Hytrel®* Tubing
These multimode lensed-tip fiber patch cables are offered with either an FC/PC or SMA905 connector on the non-lensed end and Ø900 µm black Hytrel® tubing. On the end with the lensed tip, 5 ± 1 cm of the cable is left free of the tubing to expose the inner GIF50E fiber. The last 11 ± 1 mm of fiber before the lens is stripped to the cladding.
*Hytrel® is a registered trademark of DuPont Polymers, Inc.