Fiber Collimator series 60FC-T-...-XV

Special series with bore hole for flushing

Features

Special version of the series 60FC-T fiber collimators with bore hole for flushing purposes.
Available with lenses for the UV wavelength range.
  • Focal lengths starting at 20 mm
  • Plano-convex lenses made of fused silica
  • AR coated
  • Choice of fiber receptacles: FC PC or FC APC (standard)
  • Focussing of the optics using eccentric key
  • Ø 25 mm housing
  • Integrated TILT adjustment to prevent aberrations from vignetting or clipping
  • Front connector accepts attachment optics
  • Nickel silver / anodized aluminum
  • Bore hole with M3 thread

Description

These fiber collimators are a specially modified version of the series 60FC-T fiber collimators. They additionally have a radially arranged bore hole with thread M3 for flushing purposes.
The possibility of flushing these fiber collimators makes them suitable for UV applications. (Reference: Marciniak et al., arXiv:1704.05879)

Optics for the UV
Unlike the standard series 60FC fiber collimators this series is offered with fused silica lenses which are suitable for wavelengths starting from 250 nm. Since these are plano convex lenses, they are diffraction-limited for fibers with an NAe2 < 0.04 only. All lenses are AR-coated.

Adjustment of focus and TILT
Such as with the standard series 60FC-T fiber collimators, 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 FC PC or FC APC receptacles. the fiber receptacle has an additional grub screw to increase pointing stability.

Material
The fiber collimators are made of nickel silver and black anodized aluminum.

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.

Order Options

Order Code  Focal lengthLens TypeAR CoatingConnector type*TiltOuter
60FC-4-S6-49-XV  6 mmbi-convex250 - 420 nmFC-APC Ø 12 mm
60FC-4-S9-49-XV  9 mmplano-convex250 - 420 nmFC-APC Ø 12 mm
60FC-4-S12-49-XV 12 mmplano-convex250 - 420 nmFC-APC Ø 12 mm
60FC-4-S15-49-XV15 mmplano-convex250 - 420 nmFC-APC Ø 12 mm
60FC-4-S18-49-XV18 mmplano-convex250 - 420 nmFC-APC Ø 12 mm
60FC-4-S20-49-XV20 mmplano-convex250 - 420 nmFC-APC Ø 12 mm
60FC-4-S24-49-XV24 mmplano-convex250 - 420 nmFC-APC Ø 12 mm
60FC-T-4-S20-49-XV20 mmplano-convex250 - 420 nmFC-APCXØ 25 mm
60FC-T-4-S30-49-XV30 mmplano-convex250 - 420 nmFC-APCXØ 25 mm
60FC-T-4-S40-49-XV40 mmplano-convex250 - 420 nmFC-APCXØ 25 mm
60FC-T-4-S50-49-XV50 mmplano-convex250 - 420 nmFC-APCXØ 25 mm
60FC-T-4-S60-49-XV60 mmplano-convex250 - 420 nmFC-APCXØ 25 mm
* Other connector types on request            

Technotes

FAQ

  • Troubleshooting FC PC and FC APC
    • 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. 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 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 with focal length ≥ 12 mm. The 60EX-4 is used for focal lenghts < 12 mm.

        In some very, very rare cases 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.
    • 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 prealigned and collimated for either a specific wavelength defined by the customer or a typical wavelength. The collimation 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.

Downloads

Adjustment_60FC-T.pdf (Manual)

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.