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Products Home / Fiber Components / Collimation / Coupling / Aspheric Fiber Collimators, Pigtailed PM FiberAspheric 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
Please Wait
| 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)
,
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)
,
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
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
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
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 |  |
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 |  |
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 |  |
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 |  |
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 |  |
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 |  |
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 |  |
These collimators are designed to connect onto the end of an FC/PC connector and contain an AR-coated aspheric lens. The distance between the aspheric lens and the tip of the fiber can be adjusted to compensate for focal length changes or to recollimate the beam at the wavelength and distance of interest. |
| Achromatic Fiber Collimators with Adjustable Focus |  |
Thorlabs' Achromatic Fiber Collimators with Adjustable Focus are designed with an effective focal length (EFL) of 20 mm, 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. These collimators can be used for free-space coupling into a fiber, collimation of output from a fiber, or in pairs for collimator-to-collimator coupling over long distances, which allows the beam to be manipulated prior to entering the second collimator. |
| Zoom Fiber Collimators |  |
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 |  |
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 |  |
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 |  |
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. |
| 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 633 nm | 350 - 700 nm Ravg < 0.5% |
20 dB | 0.86 mm | 4.09 mm | (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 |
| 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 | (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 |
| 780 nm | Ravg < 0.5% |
20 dB | 0.94 mm | 4.13 mm | (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 |
| 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 980 nm | Ravg < 0.5% |
20 dB | 0.88 mm | 4.14 mm | (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 |
| 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 |
| 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 |
PM Pigtailed Aspheric Lens Collimators
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