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Aspheric Fiber Collimators, Pigtailed PM Fiber


  • 1 m PM Fiber Pigtail with FC/APC Connector
  • Five Alignment Wavelengths from 633 nm to 1550 nm
  • Custom Alignment Wavelengths Available

CFP5-1064A

1064 nm, FC/APC Collimator
Focal Length: 4.67 mm

CFP2-1550A

1550 nm, FC/APC Collimator
Focal Length: 2.05 mm

CFP5-780A

780 nm, FC/APC Collimator
Focal Length: 4.63 mm

Engraved Line Parallel to
Slow Axis

Related Items


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Quick Links to Available Wavelengths
633 nm
780 nm
980 nm
1064 nm
1550 nm

Features

  • PM Fiber Pigtail with FC/APC Connector
  • Custom Wavelengths and Connectors Available by Contacting Tech Support
  • Non-Magnetic Stainless Steel Housing

The CFP series of pigtailed fiber collimators is a compact solution for a wide variety of applications. The collimation package consists of a stainless steel housing and an aspheric lens. Each unit uses 1 m of polarization-maintaining fiber pigtailed to the collimation package so that the performance of the collimator is diffraction limited at the design wavelength. As shown in the family image above, the engraved line on the outside of the housing is parallel to the slow axis. As such, it can be used as a reference when polarized light is launched accordingly.

The fiber end pigtailed to the collimation package is angle-polished and AR-coated to minimize reflections at the design wavelength. There is negligible deflection caused by the angled output over the short focal lengths of the CFP2 and CFP5 collimators, allowing them to have straight housings, instead of angled housings. The other end of the fiber has an FC/APC, 2.0 mm narrow key connector. These collimation packages can be easily customized for any wavelength in the visible and near IR spectral regions. In addition, the fiber connector, fiber type, and fiber length can all be customized; please contact Tech Support for a quote.

θ Divergence Angle
D Mode-Field Diameter (MFD)
f Focal Length of Collimator

The divergence angle (in Degrees)

divergence formula,

where D and f must be in the same units.

Divergence Angle Comparison

The divergence angle can be estimated using the formula shown to the right, given that the light emerging from the fiber has a Gaussian intensity profile. This formula works well for single mode fibers, like those found on these pigtailed collimators, but will underestimate the divergence angle for multimode fibers where the light emerging from the fiber has a non-Gaussian intensity profile.

Simulations of the theoretical divergence when using one of our standard collimators at wavelengths other than the design wavelength are shown in the graphs below. For example, if you need to collimate 700 nm light from a fiber, the CFP5-780F collimator (represented by the '-780' line in the CFP5 graph below) can be used but will provide a higher divergence than at its design wavelength of 780 nm. Individual theoretical divergence plots are also available below for each collimator. Please contact Tech Support to request a collimator aligned at a custom wavelength.

d Beam Diameter
λ Wavelength
f Focal Length of Collimator 
MFD Mode-Field Diameter

The beam diameter (in millimeters)

beam diameter formula,

where λ and MFD must be in the same units.

Theoretical Approximation of the Divergence Angle

The 1/e2 beam diameter as a function of propagation distance was simulated for each of our collimators at the design wavelength, assuming input from the design fiber and a Gaussian intensity profile. The formula shown to the right is an approximation for these beam diameters. This works well for single mode fibers, like those found on these pigtailed collimators, but will underestimate the beam diameter for multimode fibers where the light emerging from the fiber has a non-Gaussian intensity profile.

Theoretical Approximation of the Divergence Angle

The full-angle beam divergence listed in the specifications tables is the theoretically-calculated value associated with the fiber collimator. This divergence angle is easy to approximate theoretically using the formula below as long as the light emerging from the fiber has a Gaussian intensity profile. Consequently, the formula works well for single mode fibers, but it will underestimate the divergence angle for multimode (MM) fibers since the light emerging from a multimode fiber has a non-Gaussian intensity profile.

The Full Divergence Angle (in degrees) is given by

Divergence Angle Equation

where MFD is the mode field diameter and f is the focal length of the collimator. (Note: MFD and f must have the same units in this equation).

Example:

When the F220FC-A collimator (f ≈ 11.0 mm; not exact since the design wavelength is 543 nm) is used to collimate 515 nm light emerging from a 460HP fiber (MFD = 3.5 µm), the divergence angle is approximately given by

θ ≈ (0.0035 mm / 11.0 mm) x (180 / pi) = 0.018°.

When the beam divergence angle was measured for the F220FC-A collimator, a 460HP fiber was used with 543 nm light. The result was a divergence angle of 0.018°.

Theoretical Approximation of the Output Beam Diameter

The output beam diameter can be approximated from

Output Beam Diameter Equation

where λ is the wavelength of light being used, MFD is the mode field diameter, and f is the focal length of the collimator. (Note: MFD and f must have the same units in this equation).

Example:

When the F240FC-1550 collimator (f = 8.18 mm) is used with the P1-SMF28E-FC-1 patch cable (MFD = 10.4 µm) and 1550 nm light, the output beam diameter is

d ≈ (4)(0.00155 mm)[8.18 mm / (pi · 0.0104 mm)] = 1.55 mm.

Theoretical Approximation of the Maximum Waist Distance

The maximum waist distance, which is the furthest distance from the lens the waist can be located in order to maintain collimation, may be approximated by

Max Waist Distance Calculation

where f is the focal length of the collimator, λ is the wavelength of light used, and MFD is the mode field diameter. (Note: MFD and f must have the same units in this equation).

Example:

When the F220FC-532 collimator (f = 10.9 mm) is used with the P1-460B-FC-1 patch cable (MFD ≈ 4.0 µm; calculated approximate value) and 532 nm light, then the maximum waist distance is approximately

zmax ≈ 10.9 mm + [2 · (10.9 mm)2 · 0.000532 mm] / [pi · (0.004 mm)2] = 2526 mm.


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Fiber Collimator Selection Guide

Click on the collimator type or photo to view more information about each type of collimator.

Type   Description
Fixed FC, APC, or SMA Fiber Collimators Fixed SMA Fiber Collimator These fiber collimation packages are pre-aligned to collimate light from an FC/PC-, FC/APC-, or SMA-terminated fiber. Each collimation package is factory aligned to provide diffraction-limited performance for wavelengths ranging from 405 nm to 4.55 µm. Although it is possible to use the collimator at detuned wavelengths, they will only perform optimally at the design wavelength due to chromatic aberration, which causes the effective focal length of the aspheric lens to have a wavelength dependence.
Air-Spaced Doublet, Large Beam Collimators Air-Spaced Doublet Fiber Collimator For large beam diameters (Ø5.3 - Ø8.5 mm), Thorlabs offers FC/APC, FC/PC, and SMA air-spaced doublet collimators. These collimation packages are pre-aligned at the factory to collimate a laser beam propagating from the tip of an FC or SMA-terminated fiber and provide diffraction-limited performance at the design wavelength.
Triplet Collimators Triplet Fiber Collimator Thorlabs' High Quality Triplet Fiber Collimation packages use air-spaced triplet lenses that offer superior beam quality performance when compared to aspheric lens collimators. The benefits of the low-aberration triplet design include an M2 term closer to 1 (Gaussian), less divergence, and less wavefront error.
Achromatic Collimators for Multimode Fiber Triplet Fiber Collimator Thorlabs' High-NA Achromatic Collimators pair a meniscus lens with an achromatic doublet for high performance across the visible spectrum with low spherical aberration. Designed for use with high-NA multimode fiber, these collimators are ideal for Optogenetics and Fiber Photometry applications.
Reflective Collimators Reflective Fiber Collimator Thorlabs' metallic-coated Reflective Collimators are based on a 90° off-axis parabolic mirror. Mirrors, unlike lenses, have a focal length that remains constant over a broad wavelength range. Due to this intrinsic property, a parabolic mirror collimator does not need to be adjusted to accommodate various wavelengths of light, making them ideal for use with polychromatic light. Our reflective collimators are ideal for single-mode fiber.
FiberPorts Fiberport Fiber Collimator These compact, ultra-stable FiberPort micropositioners provide an easy-to-use, stable platform for coupling light into and out of FC/PC, FC/APC, or SMA terminated optical fibers. It can be used with single mode, multimode, or PM fibers and can be mounted onto a post, stage, platform, or laser. The built-in aspheric or achromatic lens is available with five different AR coatings and has five degrees of alignment adjustment (3 translational and 2 pitch). The compact size and long-term alignment stability make the FiberPort an ideal solution for fiber coupling, collimation, or incorporation into OEM systems.
Adjustable Fiber Collimators Adjustable Fiber Collimator These collimators are designed to connect onto the end of an FC/PC or FC/APC connector and contain an AR-coated aspheric lens. The distance between the aspheric lens and the tip of the FC-terminated fiber can be adjusted to compensate for focal length changes or to recollimate the beam at the wavelength and distance of interest.
Large Beam Fiber Collimators large beam collimators Thorlabs' Large-Beam Fiber Collimators are designed with an effective focal length (EFL) of 40 mm or 80 mm, have optical elements broadband AR coated for one of three wavelength ranges, and are available with FC/PC, FC/APC, or SMA905 connectors. A four-element, air-spaced lens design produces superior beam quality (M2 close to 1) and less wavefront error when compared to aspheric lens collimators. As a result, these collimators are very flexible; they can be used as free-space collimators or couplers. They may also be used over a long distance in pairs, which allows the free-space beam to be manipulated prior to entering the second collimator and may be useful in long-distance communications applications.
Zoom Fiber Collimators Zoom Fiber Collimator These collimators provide a variable focal length between 6 and 18 mm, while maintaining the collimation of the beam. As a result, the size of the beam can be changed without altering the collimation. This universal device saves time previously spent searching for the best suited fixed fiber collimator and has a very broad range of applications. They are offered with FC/PC, FC/APC, or SMA905 connectors with three different antireflection wavelength ranges to choose from.
Single Mode Pigtailed Collimators Pigtailed Fiber Collimator Our single mode pigtailed collimators come with one meter of fiber, consist of an AR-coated aspheric lens pre-aligned with respect to a fiber, and are collimated at one of eight wavelengths: 532 nm, 633 nm, 780 nm, 850 nm, 1030 nm, 1064 nm, 1310 nm, or 1550 nm. Although it is possible to use the collimator at any wavelength within the coating range, the coupling loss will increase as the wavelength is detuned from the design wavelength.
Polarization Maintaining Pigtailed Collimators Our polarization maintaining pigtailed collimators come with one meter of fiber, consist of an AR-coated aspheric lens pre-aligned with respect to a fiber, and are collimated at one of six wavelengths: 532 nm, 830 nm, 1030 nm, 1064 nm, 1310 nm, or 1550 nm. Custom wavelengths and connectors are available as well. A line is engraved along the outside of the housing that is parallel to the slow axis. As such, it can be used as a reference when polarized light is launched accordingly. Although it is possible to use the collimator at any wavelength within the coating range, the coupling loss will increase as the wavelength is detuned from the design wavelength.
GRIN Fiber Collimators GRIN Fiber Collimator Thorlabs offers gradient index (GRIN) fiber collimators that are aligned at a variety of wavelengths from 630 to 1550 nm and have either FC terminated, APC terminated, or unterminated fibers. Our GRIN collimators feature a Ø1.8 mm clear aperture, are AR-coated to ensure low back reflection into the fiber, and are coupled to standard single mode or graded-index multimode fibers.
GRIN Lenses GRIN Lens These graded-index (GRIN) lenses are AR coated for applications at 630, 830, 1060, 1300, or 1560 nm that require light to propagate through one fiber, then through a free-space optical system, and finally back into another fiber. They are also useful for coupling light from laser diodes into fibers, coupling the output of a fiber into a detector, or collimating laser light. Our GRIN lenses are designed to be used with our Pigtailed Glass Ferrules and GRIN/Ferrule sleeves.

633 nm Pigtailed Aspheric Collimators

Item # Alignment
Wavelengtha
Lens AR
Coating
Minimum
Extinction
Ratiob
Waist
Diameterc
Waist
Distanced
Full-Angle
Divergencee
NALens Focal Length at
Alignment
Wavelength
Clear
Aperture
Housing
Outer
Diameter
Connector
Type
CFP5-633A 633 nm 350 - 700 nm
Ravg < 0.5%
20 dB 0.86 mm 4.09 mm 0.05° +0.01° / -0.00°
(0.94 +0.17 / -0.00 mrad)
0.53 4.59 mm 3.0 mm 5.7 mmf 2.0 mm
Narrow Key
FC/APC
Fiber Type Fiber Length Insertion Loss Return Loss Mode Field Diameter
PM630-HP 1 m <1.2 dB ≥50 dB 4.5 ± 0.5 µm @ 630 nm
  • For optimal collimation, these packages should be used at the alignment wavelength. For some applications, they may also be used at other wavelengths within the AR coating range. Please contact Tech Support for packages that are aligned at other wavelengths. 
  • Measured at the alignment wavelength when launching parallel to the slow axis.
  • Theoretical 1/e2 Diameter at 1 Focal Length from Lens at Alignment Wavelength
  • Measured from the Front of the Collimator Housing
  • Theoretical 1/e2 Divergence Angle for the Alignment Wavelength
  • This collimator is compatible with the AD57F collimator mounting adapter.
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
CFP5-633A Support Documentation
CFP5-633ANEW!Customer Inspired! Pigtailed Aspheric Collimator, EFL 4.59 mm, 633 nm, FC/APC
$350.00
Today

780 nm Pigtailed Aspheric Collimators

Item # Alignment
Wavelengtha
Lens AR
Coating
Minimum
Extinction
Ratiob
Waist
Diameterc
Waist
Distanced
Full-Angle
Divergencee
NALens Focal Length at
Alignment
Wavelength
Clear
Aperture
Housing
Outer
Diameter
Connector
Type
CFP2-780A 780 nm 600 - 1050 nm
Ravg < 0.5%
20 dB 0.41 mm 1.99 mm 0.14° +0.01° / -0.00°
(2.45 +0.17 / -0.00 mrad)
0.50 2.00 mm 2.0 mm 4.0 mmf 2.0 mm
Narrow Key
FC/APC
CFP5-780A 780 nm 650 - 1050 nm
Ravg < 0.5%
20 dB 0.94 mm 4.13 mm 0.06° +0.01° / -0.00°
(1.06 +0.17 / -0.00 mrad)
0.53 4.63 mm 3.0 mm 5.7 mmg
Fiber Type Fiber Length Insertion Loss Return Loss Mode Field Diameter
PM780-HP 1 m <1.0 dB ≥50 dB 5.3 ± 1.0 µm @ 850 nm
  • For optimal collimation, these packages should be used at the alignment wavelength. For some applications, they may also be used at other wavelengths within the AR coating range. Please contact Tech Support for packages that are aligned at other wavelengths. 
  • Measured at the alignment wavelength when launching parallel to the slow axis.
  • Theoretical 1/e2 Diameter at 1 Focal Length from Lens at Alignment Wavelength
  • Measured from the Front of the Collimator Housing
  • Theoretical 1/e2 Divergence Angle for the Alignment Wavelength
  • This collimator is compatible with the AD4F collimator mounting adapter.
  • This collimator is compatible with the AD57F collimator mounting adapter.
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
CFP2-780A Support Documentation
CFP2-780ANEW!Customer Inspired! Pigtailed Aspheric Collimator, EFL 2.00 mm, 780 nm, FC/APC
$350.00
Today
CFP5-780A Support Documentation
CFP5-780ANEW!Customer Inspired! Pigtailed Aspheric Collimator, EFL 4.63 mm, 780 nm, FC/APC
$350.00
Today

980 nm Pigtailed Aspheric Collimators

Item # Alignment
Wavelengtha
Lens AR
Coating
Minimum
Extinction
Ratiob
Waist
Diameterc
Waist
Distanced
Full-Angle
Divergencee
NALens Focal Length at
Alignment
Wavelength
Clear
Aperture
Housing
Outer
Diameter
Connector
Type
CFP5-980A 980 nm 650 - 1050 nm
Ravg < 0.5%
20 dB 0.88 mm 4.14 mm 0.08° +0.01° / -0.00°
(1.42 +0.17 / -0.00 mrad)
0.53 4.66 mm 3.0 mm 5.7 mmf 2.0 mm
Narrow Key
FC/APC
Fiber Type Fiber Length Insertion Loss Return Loss Mode Field Diameter
PM980-XP 1 m <0.7 dB ≥50 dB 6.6 ± 0.5 μm @ 980 nm
  • For optimal collimation, these packages should be used at the alignment wavelength. For some applications, they may also be used at other wavelengths within the AR coating range. Please contact Tech Support for packages that are aligned at other wavelengths. 
  • Measured at the alignment wavelength when launching parallel to the slow axis.
  • Theoretical 1/e2 Diameter at 1 Focal Length from Lens at Alignment Wavelength
  • Measured from the Front of the Collimator Housing
  • Theoretical 1/e2 Divergence Angle for the Alignment Wavelength
  • This collimator is compatible with the AD57F collimator mounting adapter.
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
CFP5-980A Support Documentation
CFP5-980ANEW!Customer Inspired! Pigtailed Aspheric Collimator, EFL 4.66 mm, 980 nm, FC/APC
$350.00
Today

1064 nm Pigtailed Aspheric Collimators

Item # Alignment
Wavelengtha
Lens AR
Coating
Minimum
Extinction
Ratiob
Waist
Diameterc
Waist
Distanced
Full-Angle
Divergencee
NALens Focal Length at
Alignment
Wavelength
Clear
Aperture
Housing
Outer
Diameter
Connector
Type
CFP5-1064A 1064 nm 1050 - 1700 nm
Ravg < 0.5%
20 dB 0.82 mm 4.18 mm 0.09° +0.01° / -0.00°
(1.65 +0.17 / -0.00 mrad)
0.53 4.67 mm 3.0 mm 5.7 mmf 2.0 mm
Narrow Key
FC/APC
Fiber Type Fiber Length Insertion Loss Return Loss Mode Field Diameter
PM980-XP 1 m <0.7 dB ≥50 dB 6.6 ± 0.5 μm @ 980 nm
  • For optimal collimation, these packages should be used at the alignment wavelength. For some applications, they may also be used at other wavelengths within the AR coating range. Please contact Tech Support for packages that are aligned at other wavelengths. 
  • Measured at the alignment wavelength when launching parallel to the slow axis.
  • Theoretical 1/e2 Diameter at 1 Focal Length from Lens at Alignment Wavelength
  • Measured from the Front of the Collimator Housing
  • Theoretical 1/e2 Divergence Angle for the Alignment Wavelength
  • This collimator is compatible with the AD57F collimator mounting adapter.
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
CFP5-1064A Support Documentation
CFP5-1064ANEW!Customer Inspired! Pigtailed Aspheric Collimator, EFL 4.67 mm, 1064 nm, FC/APC
$350.00
Today

1550 nm Pigtailed Aspheric Collimators

Item # Alignment
Wavelengtha
Lens AR
Coating
Minimum
Extinction
Ratiob
Waist
Diameterc
Waist
Distanced
Full-Angle
Divergencee
NALens Focal Length at
Alignment
Wavelength
Clear
Aperture
Housing
Outer
Diameter
Connector
Type
CFP2-1550A 1550 nm 1050 - 1700 nm
Ravg < 0.5%
20 dB 0.40 mm 2.01 mm 0.28° +0.01° / -0.00°
(4.94 +0.17 / -0.00 mrad)
0.50 2.05 mm 2.0 mm 4.0 mmf 2.0 mm
Narrow Key
FC/APC
CFP5-1550A 1550 nm 1050 - 1700 nm
Ravg < 0.5%
20 dB 0.92 mm 4.23 mm 0.12° +0.01° / -0.00°
(2.14 +0.17 / -0.00 mrad)
0.53 4.73 mm 3.0 mm 5.7 mmg
Fiber Type Fiber Length Insertion Loss Return Loss Mode Field Diameter
PM1550-XP 1 m <0.5 dB ≥50 dB 10.1 ± 0.4 μm @ 1550 nm
  • For optimal collimation, these packages should be used at the alignment wavelength. For some applications, they may also be used at other wavelengths within the AR coating range. Please contact Tech Support for packages that are aligned at other wavelengths. 
  • Measured at the alignment wavelength when launching parallel to the slow axis.
  • Theoretical 1/e2 Diameter at 1 Focal Length from Lens at Alignment Wavelength
  • Measured from the Front of the Collimator Housing
  • Theoretical 1/e2 Divergence Angle for the Alignment Wavelength
  • This collimator is compatible with the AD4F collimator mounting adapter.
  • This collimator is compatible with the AD57F collimator mounting adapter.
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
CFP2-1550A Support Documentation
CFP2-1550ANEW!Customer Inspired! Pigtailed Aspheric Collimator, EFL 2.05 mm, 1550 nm, FC/APC
$350.00
Today
CFP5-1550A Support Documentation
CFP5-1550ANEW!Customer Inspired! Pigtailed Aspheric Collimator, EFL 4.73 mm, 1550 nm, FC/APC
$350.00
Today
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