Fiber Coupler and Fiber Collimator 60FC-F

This product has been discontinued. Requests will be managed according to the residual stock. Contact us to discuss any specific need. Similar product:

Fiber Collimator series 60FC-SF

Fiber Collimator/Fiber Coupler with super-fine thread

This product has been discontinued. Requests will be managed according to the residual stock. Contact us to discuss any specific need. Similar product: 60FC-SF

Description

The fiber collimators series 60FC-F are designed for collimating radiation exiting optical fiber cables with high pointing stability. They can also be used in reverse-mode as fiber incouplers. They are suitable for single-mode and polarization-maintaining fiber cables leading to collimated beams with a Gaussian intensity profile.

An optics for each application
A large variety of collimating optics allows that the optimum focal length and the best lens type for a single wavelength (asphere, monochromat) or a wavelength range (achromat) can be selected for each application. All lenses are AR-coated. For an ideal Gaussian beam and standard fibers you can reach coupling efficiencies up to 80%.

Adjustment of focus
The distance between fiber end-face and collimating optics is adjusted using a fine-threaded ring. The lens in these fiber collimators is spring-loaded. The linear bearing ensures that the lens does not rotate when adjusting the focus. The final focus setting is locked by means of two radially arranged clamping screws.

Optimum lens performance
The angled polish of connectors of type APC is considered by a pre-angled mechanical coupling axis that compensates the beam deflection and you can use the lens centrically. This minimizes aberrations simply resulting from a non-ideal beam path through the lens.

Connector Type
The fiber collimator can be equipped with FC PC (wide key*), FC APC (wide key*) receptacles. Because of the spring loaded ferrule the fiber coupler has an additional grub screw to increase pointing stability. *Even though the fiber coupler has a wide key receptacle it still can be used with both narrow key and wide key fibers. More information can be found here.

Material
The fiber collimators are available in nickel silver.

Mounting
The collimator can be placed into a standard mirror mount using the corresponding adapters.

This product has been discontinued. Requests will be managed according to the residual stock. Contact us to discuss any specific need. Similar product: 60FC-SF

Technotes

This product has been discontinued. Requests will be managed according to the residual stock. Contact us to discuss any specific need. Similar product: 60FC-SF

FAQ

Fiber Receptacle
- FC PC and FC APC
  - What type of receptacle does my collimator with receptacle type FC have? Narrow key or wide key?
    All our fiber collimators and couplers with a receptacle type FC have a so calles wide key receptacle (2.14 mm).
    
    These are suitable for connecting fibers with connector type FC (wide key) but also with thos of type narrow key! You can find the details in the FAQs below.
  - How do I attach a fiber cable?
    To prevent damage to the sensitive fiber end-face, always insert the fiber connector`s ferrule at an angle, with the connector key properly aligned to the receptacle notch.
    When the ferrule tip is safely located in the inner cylinder of the receptacle, align the connector to the receptacle axis and carefully introduce the connector into the fiber coupler.
    Then, orient the connector key in a way that it is pressed gently onto the right-hand side of the receptacle notch ("right-hand orientation rule").
    Gently screw on the connector cap nut onto the receptacle until it is finger-tight.
    Gently tighten the fiber grub screw to reduce the free play of the ferrule in the receptacle.
  - What is the "right-hand orientation rule"?
    When the ferrule tip is safely located in the inner cylinder of the receptacle, align the connector to the receptacle axis and carefully introduce the connector into the fiber coupler.
    Then, orient the connector key in a way that it is pressed gently onto the right-hand side of the receptacle notch.
    The tightened grub screw and the "right-hand orientation rule" for the connector, ensure a high reproducibility in mode field position and angle, which is especially important for attaching and reattaching polarization-maintaining fibers reproducibly.
  - Can I attach a narrow key fiber cable to a fiber coupler with a wide key receptacle?
    Yes, you can- without any problem. Simply adhere to the "right-hand orientation rule".
    Generally, with any FC PC or FC APC type connector there is a freeplay when inserting the fiber into the fiber coupler. The free play in between the connector ferrule and receptacle is only a few microns, but necessary for inserting the ferrule without force. There is a difference between the receptable and key width for wide key (2.14 mm) and narrow key (2.0 mm) fibers. If you follow the so-called "right-hand orientation rule" you can reproducibly attach and reattach even PM fibers with narrow key receptacle to fiber couplers with wide key receptacle without difficulty.
    "Right-hand orientation rule":
    When the ferrule tip is safely located in the inner cylinder of the receptacle, align the connector to the receptacle axis and carefully introduce the connector into the fiber coupler. Then, orient the connector key in a way that it is pressed gently onto the right-hand side of the receptacle notch. The tightened grub screw and the "right-hand orientation rule" for the connector, ensure a high reproducibility in mode field position and angle, which is especially important for attaching and reattaching polarization-maintaining fibers reproducibly.
Troubleshooting
- I can‘t collimate the radiation out of a coupler. Why?
  - Have you loosened the grub screws?
    The clamp screws have to be loosened before changing the focus setting, Please refer to the adjustment instructions of the individual couplers for more details.
  - Have you checked, if the fiber is correctly placed within the fiber receptacle of the coupler?
    The fiber connector might not be placed correctly within the receptacle of the coupler/collimator. In particular, please check the small grub screw holding the connector's ferrule (e.g. for FC PC and FC APC type couplers). It might be in the way. Please refer to the adjustment instructions of the individual couplers/collimators for more details.
  - Have you tried another eccentric key?
    Please check, if the eccentric key is damaged or broken.
    
    Please also check, if you are using the appropriate eccentric key. The eccentric key type 60EX-5 has a larger stroke compared to the key type 60EX-4. The 60EX-5 is used for couplers/collimators with focal length ≥ 12 mm. The 60EX-4 is used for focal lenghts < 12 mm.
    
    In some very rare cases (e.g.shorter wavelengths and end cap fibers) the stroke of the original eccentric key may be too small for the coupler in your applictation. (See FAQ "Difference between 60EX-4 and 60EX-5"). Try using the 60EX-5 in this case.
  - Have you checked the eccentric key for damage?
    The eccentric key might be damaged or broken. If that is the case, try another eccentric key of the same type and (or) contact Schäfter+Kirchhoff for replacement.
  - Are you using a fiber with an end cap?
    Collimating/coupling with an end cap fiber cable is no different than with a standard fiber cable. However, the focus position might vary a little (<200 µm) when swapping a standard fiber cable for a fiber cable with end cap.
    
    The eccentric key 60EX-4 is used to adjust the focus position. In some cases the stroke is not large enough.
    
    This includes working with very small wavelegths or very large wavelengths. Please try using the eccentric key 60EX-5 with a larger stroke instead.
- It says my coupler/collimator was "precollimated" but the collimation setting seems to not be alright. What might be the problem?
  - Are you using the same wavelength as the adjustment wavelength?
    Schäfter+ Kirchhoff ships all collimators/couplers prealigned and collimated/preadjusted for either a specific wavelength defined by the customer or a typical wavelength. The prealigned is performed using professional collimating telescopes.
    
    The adjustment wavelength is given on the label for each collimator/coupler. If you are using another wavelength you need to change the focus setting. Please refer to the manual for more details.
  - Are you using the same fiber type as in the adjustment procedure?
    The fibers used in the standard adjustment procedure are all equipped with an end cap when aligning for wavelengths ≤ 520 nm. The adjustment wavelength is given on the label for each collimator/coupler. If a fiber with end cap was used it is marked by "EC".
    
    If you are not using a fiber with an end cap but the preadjustment at Schäfter+Kirchhoff was done using an end cap ("EC") or you are using a fiber with an end cap and the preadjustment at Schäfter+Kirchhoff was done without, you might need to change the focus setting. Please refer to the manual for more details.

This product has been discontinued. Requests will be managed according to the residual stock. Contact us to discuss any specific need. Similar product: 60FC-SF

Downloads

Adjustment_60FC-F.pdf (Manual)

Article_FibercouplingNAe2.pdf (Technote)

This downloads section only includes general downloads for the complete series.
Please access the individual product pages (using the product configurator, the product list, order options or the search button if you have a complete order code). Here you will find specific downloads including technical drawings or stepfiles.

This product has been discontinued. Requests will be managed according to the residual stock. Contact us to discuss any specific need. Similar product: 60FC-SF

Accessories

Adjustment Tools Fiber Optics

Adapters for 60FC

for Ø 12 mm to diameter Ø 25 mm, Ø 1'' or with system mount Ø 19.5 mm

This product has been discontinued. Requests will be managed according to the residual stock. Contact us to discuss any specific need. Similar product: 60FC-SF

Related products

Fiber Collimator series 60FC-SF

Fiber Collimator/Fiber Coupler with super-fine thread

Fiber Collimator Series 60FC

for collimating radiation exiting an optical fiber or as an incoupler

Laser Beam Couplers Series 60SMS

for coupling into single-mode and polarization-maintaining fiber cables

Overview

Lens Code	A2.7	A3.1	M3.1	A4	M4	A4.5	A4.5S	M5	A6.2	A6.2S	M6.2	A7.5	M7.5	M8	M10	A11	M11	RGBV11	M12	M12NIR	M15	A15	A18	M18	M20
Focal length f'	2.7	3.1	3.1	4.0	4.0	4.5	4.5	5.0	6.2	6.2	6.2	7.5	7.5	8.0	10.0	11.0	11.0	11.0	12.0	12.0	15.0	15.3	18.4	18.4	20.0
Numerical Apperture NA	0.65	0.77	0.27	0.64	0.21	0.5	0.43	0.25	0.4	0.3	0.2	0.3	0.3	0.23	0.21	0.25	0.23	0.18	0.23	0.23	0.19	0.16	0.15	0.18	0.17
Clear apert. max. [mm]	3.6	5	1.7	5.1	1.7	4.95	3.7	2.8	4.95	3.7	2.5	4.5	4.5	3.8	4.2	5.5	5.2	4	5.4	5.4	5.6	5	5.5	6.6	6.8
Correction - achrom.			X		X						X		X		X		X	X	X	X	X
350 - 700 nm				01			01			01	01	01				01						01	01
390 - 670 nm			51		33			33			33			33					33					33	33
400 - 1000 nm					24																24
400 - 700 nm													01		01			47			01
420 - 700 nm															26						26
450 - 700 nm															04
520 - 830 nm																	18
600 - 1050 nm				02								02				02						02	02
630 - 1080 nm								10						10										10	10
630 - 980 nm																			10	10
650 - 1150 nm						07			07
650 - 1050 nm													02		02						02
750 - 1550 nm																			37		37
980 - 1550 nm								08						08					08					08	08
1050 - 1620 nm															03
1050 - 1550 nm	03			03			03			03		03				03						03	03
1300 - 1700 nm	45	45					45			45		45				45						45	45
Lens Code	A2.7	A3.1	M3.1	A4	M4	A4.5	A4.5S	M5	A6.2	A6.2S	M6.2	A7.5	M7.5	M8	M10	A11	M11	RGBV11	M12	M12NIR	M15	A15	A18	M18	M20
Focal length f'	2.7	3.1	3.1	4.0	4.0	4.5	4.5	5.0	6.2	6.2	6.2	7.5	7.5	8.0	10.0	11.0	11.0	11.0	12.0	12.0	15.0	15.3	18.4	18.4	20.0
Numerical Apperture NA	0.65	0.77	0.27	0.64	0.21	0.5	0.43	0.25	0.4	0.3	0.2	0.3	0.3	0.23	0.21	0.25	0.23	0.18	0.23	0.23	0.19	0.16	0.15	0.18	0.17
Clear apert. max. [mm]	3.6	5	1.7	5.1	1.7	4.95	3.7	2.8	4.95	3.7	2.5	4.5	4.5	3.8	4.2	5.5	5.2	4	5.4	5.4	5.6	5	5.5	6.6	6.8
Correction - achrom.			X		X						X		X		X		X	X	X	X	X

Fiber Collimator series 60FC-F

Features

Description

Technotes

FAQ

Downloads

Accessories

Overview