Laser Beam Coupler 60FC-LSA

Description

The fiber collimators series 60FC 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. Please note that for multimode collimation the intensity profile is not Gaussian and depends on specific fiber and radiation properties.

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 or apochromat) 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 by means of an eccentric key. The lens does not rotate when adjusting the focus. The final focus setting is locked by means of two radially arranged clamping screws. Additionally attachment optics can be mounted to the front of the collimator.

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.

Receptacle Type LSA
The fiber coupler has a receptacle of type LSA and is available as PC (for fibers with 0°-polish) and APC (for fibers with 8°-polish). The receptacle type LSA is compatible with fiber connectors type DIN, AVIO and AVIM. Since fibers with this connector type have a spring loaded ferrule, the fiber coupler has an additional grub screw to increase pointing stability. Compatible fibers can be found on www.diamond-fo.com.

Material Options
The fiber collimators are available in nickel silver (standard) or in amagnetic titanium. In case of titanium, the relative permeability is near 1 (µr=1.00005) making it almost transparent to magnetic fields. The linear coefficient of thermal expansion is close to that of the optics so that a thermal stability over a larger temperature range can be expected.

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

Technotes

FAQ

Adjustment
- How much can I change the focus setting?
  For couplers and collimators with a focal length < 12 mm you can change the focus setting ± 0.5 mm. For couplers and collimators with a focal length ≥ 12 mm you can change the focus setting ± 1.0 mm.
- What is the difference between the eccentric keys type 60EX-4 and 60EX-5?
  Both eccentric keys are used for the fiber collimators series 60FC and the laser beam couplers series 60SMF/60SMS.The difference between the two eccentric keys is their stroke:
  The eccentric key type 60EX-5 has a larger stroke compared to the key type 60EX-4. The 60EX-5 is used for couplers with focal length ≥ 12 mm. The 60EX-4 is used for focal lenghts < 12 mm.
  In some (very, rare) cases it might be necessary to use the eccentric key type 60EX-5 even for couplers with focal lengths shorter than 12 mm:
  - When the coupler is used with a fiber connector that has an end cap,
  - the coupler is collimated for an extremely long wavelength,
  - the coupler is collimated for an extremely short wavelength,
  - or the coupler is focussed to a finite distance in order to generate a small spot .
- How do I collimate a coupler with an end cap fiber cable?
  Collimating 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. Please use the eccentric key 60EX-5 with a larger stroke instead.
- I do not have a collimating telescope to collimate. Can you give me practical advice?
  Of coarse, a collimating telescope is the best way to collimate. But there are other methods depending on the type of fiber (single-mode and PM vs. multimode) you can use. Please refer to our practical collimating tips here.
- My collimator is shipped "prealigned". What does this mean?
  Schäfter+ Kirchhoff ships all collimators prealigned and collimated for either a specific wavelength defined by the customer or a typical wavelength. The collimation is performed using professional collimating telescopes.
  
  Please note: 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".
- I am unsure how to correctly adjust my coupler/collimator. Where do I find details about the adjustment procedure?
  Please refer to the manual in the Downloads section for a detailed adjustment procedure.

Downloads

Adjustment_60FC-LSA.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.

Accessories

Adjustment Tools Fiber Optics

Attachment optics series 5

to attach in the front of collimators with system mount Ø 8 mm

Micro Focus Optics series 5M

for transforming a collimated beam into a micro focus spot

Iris Diaphragms BL

for collimators

Polarization Filters 5PF

for attaching to 60FC Fiber Collimators

Retardation Optics 5WP

Retardation optics for fiber collimators with Ø 12 mm

Related products

Adapters for 60FC

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

Fiber Collimator Series 60FC

for collimating radiation exiting an optical fiber or as an incoupler

Laser Beam Couplers Series 60SMF

with fine-thread adjustment screws - for coupling into single-mode and polarization-maintaining fiber cables

Fiber Collimator series 60FC-SF

Fiber Collimator/Fiber Coupler with super-fine thread

Fiber Collimator Series 60FC-T

for collimating large beam diameters and with additional TILT adjustment

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 - 700 nm													01		01			47			01
400 - 1000 nm					24																24
420 - 700 nm															26						26
450 - 700 nm															04
520 - 830 nm																	18
600 - 1050 nm				02								02				02						02	02
630 - 980 nm																			10	10
630 - 1080 nm								10						10										10	10
650 - 1050 nm													02		02						02
650 - 1150 nm						07			07
750 - 1550 nm																			37		37
980 - 1550 nm								08						08					08					08	08
1050 - 1550 nm	03			03			03			03		03				03						03	03
1050 - 1620 nm															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-LSA

Features

Description

Technotes

FAQ

Downloads

Accessories

Overview