Fiber Collimator series 60FC

for collimating radiation exiting an optical fiber or as an incoupler

Fiber collimator 60FC-4
Fiber collimator 60FC-4
Fiber collimator 60FC-4
Fiber collimator 60FC-4
Fiber collimator 60FC-4
Representative product images. Individual product images are found on the individual product pages.


The fiber collimator is designed for collimating radiation exiting from an optical fiber cable or used in reverse as a fiber coupler (fiber port) for coupling a beam into an optical fiber cable.
  • Focal lengths up to 20 mm
  • Choice of aspheres, monochromats, achromats and apochromats
  • Various AR coatings for UV - IR
  • Choice of fiber receptacles: FC PC or FC APC (standard), many others available
  • Compact Ø 12 mm housing
  • Front connector accepts attachment optics
  • Nickel silver or amagnetic titanium


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.

Connector Type 
The fiber collimator can be equipped with FC PC, FC APC, ST or LSA (compatible with fiber connectors type DIN, AVIO and AVIM) receptacles. F-SMA type receptacles are available for 0°-polish e.g. for SMA-905 High Power connectors. In case of FC or LSA with a spring loaded ferrule the fiber coupler has an additional grub screw to increase pointing stability.

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.

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



  • 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.
    • 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.
  • Fiber Collimators with receptacle type SMA
    • Why do we not offer fiber couplers without TILT alignment and a receptacle type F-SMA with an angled polish?

      The fiber connectors of type SMA do not have a spring-loaded ferrule (such as FC type connectors do).

      The receptacles do not have a limit stop.
      Since the length of the ferrule is not defined precisely, the emitting point in the fiber coupler is not properly defined.

      In case of a 0°-polish this is not a problem since you can adjust for this by adjusting the axial lens position.

      However, in case of an SMA fiber connector with an angled polish, the emitting point additionally moves laterally with ferrule length.

      In order to compensate for this lateral displacement, a TILT alignment is absoluetely necessary. 


Adjustment_60FC.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.


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

for transforming a collimated beam into a micro focus spot
for collimators
for attaching to 60FC Fiber Collimators

Retardation optics for fiber collimators with Ø 12 mm