Fiber Collimator series 60FC-T

for collimating large beam diameters and with additional TILT adjustment

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

Features

The fiber collimator series 60FC-T 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. It has an integrated TILT adjustment to prevent aberrations from vignetting or clipping.
  • Large beam diameters: Focal lengths up to 200 mm
  • Choice of monochromats or achromats
  • Various AR coatings for UV - IR
  • Choice of fiber receptacles: FC PC or FC APC (standard), many others available
  • Integrated TILT adjustment to prevent aberrations from vignetting or clipping
  • Front connector accepts attachment optics
  • With integrated TILT adjustment

Description

The fiber collimators series 60FC-T 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. Please note that for multimode collimation the intensity profile is not Gaussian and depends on certain 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 (monochromat) or a wavelength range (achromat) can be selected for each application. All lenses are AR-coated.

Adjustment of focus and TILT
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.
Additionally, the collimator has an integrated TILT adjustment for aligning the beam axis to the mechanical axis. This prevents vignetting of the collimated beam as well as diffraction arising from the clipped beam.

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 receptacles of type FC PC, FC APC, ST or LSA (compatible with fiber connectors type DIN, AVIO and AVIM). In case of FC or LSA with a spring loaded ferrule the fiber coupler has an additional grub screw to increase pointing stability.

Material
The fiber collimators are made of nickel silver and black anodized aluminum (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
All Fiber Collimators 60FC-T with diameter Ø25 mm can be placed in a standard mirror mount. 60FC-T with a larger diameter posses a flange for low-strain mounting e.g. using the clamp collars series CC.

Technotes

FAQ

  • Adjustment
    • How much can I change the focus setting?
      You can change the focus setting ± 2.0 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 Receptacle
    • FC PC and FC APC
      • How do I attach a fiber cable?

        1. 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.
        2. 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.
        3. 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").
        4. Gently screw on the connector cap nut onto the receptacle until it is finger-tight.
        5. 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 th 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.


  • 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. 

Downloads

Adjustment_60FC-T.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

for all collimators with flange, different sizes
for collimators

Micro Focus Optics for Fiber Collimators of all series

Retardation optics for fiber collimators