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Fiber Coupler Series 60FC-A19.5
The 60FC-A19.5 fiber couplers are designed for coupling a collimated laser beam into a multimode
fiber cable.
This document assists you in installing and aligning the series 60FC-A19.5 fiber couplers. It
describes how a fiber is attached, how the focus setting is adjusted and how it is aligned to your
laser.
Before You Start
Ensure that the fiber holding screw does not protrude into the inner cylinder of the fiber receptacle.
This would damage the fiber, especially if the fiber connector is forced into the receptacle despite
the protruding screw.
Use the screwdriver 9D-12 to carefully retract the pin screw out of harm's way (Fig. 1, left).
Take care not to retract it too far, it is small and easily lost.
Ensure that the fiber cable matches the receptacle type:
-
Use FC-APC (8°-polish) cables for fiber collimators with an inclined coupling axis (60FC-4)
-
Use FC-PC (0°-polish) cables for fiber collimators with a coaxial axis (60FC-0)
Caution:
-
Do not touch the optical surface of the lens nor the fiber end face
-
If the collimator is not in use install both protection caps
-
In order to avoid photo contamination remove the protection caps before you launch
radiation to the fiber collimator
Connecting the Fiber Coupler to your System
It is very important for correct coupling that the laser beam reaching the coupler is centered. This
can be tested by attaching the 13BL1-13 aperture instead of the fiber coupler (Figure 1: Left).
Especially for HeNe lasers, Schäfter+Kirchhoff offers adapter flanges which can be moved laterally
in elongated holes in order to center the adapter flange with the laser beam (Figure 1: Right).
Only a coarse alignment is necessary, and this can be done by hand, as the positioning accuracy
must only be a fraction (7 - 10 %) of the beam diameter.
Aperture
Adapter Flange
Figure 1 left: The laser beam and the adapter
flange are centered using an aperture.
Schäfter + Kirchhoff GmbH
Kieler Str. 212, D−22525 Hamburg · Tel: (+49) 40 − 85 39 97 − 0 · Fax: (+49) 40 − 85 39 97 − 79 · e−mail: info@SuKHamburg.de · Web: http://www.SuKHamburg.de
Schäfter+Kirchhoff
OPTICS, METROLOGY, AND PHOTONICS
Lateral Adjustment
Figure 1 right: Adapter flange with elongated
holes for a lateral adjustment.
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Summary of Contents for Schäfter+Kirchhoff 60FC-A19.5 Series
- Page 1 Schäfter+Kirchhoff OPTICS, METROLOGY, AND PHOTONICS Fiber Coupler Series 60FC-A19.5 The 60FC-A19.5 fiber couplers are designed for coupling a collimated laser beam into a multimode fiber cable. This document assists you in installing and aligning the series 60FC-A19.5 fiber couplers. It describes how a fiber is attached, how the focus setting is adjusted and how it is aligned to your laser.
- Page 2 Schäfter+Kirchhoff OPTICS, METROLOGY, AND PHOTONICS Locate the three radially arranged tapered pin screws in the adapter flange (Figure 3: Left) and loosen them using the hex screwdriver 50HD-15. For an adapter flange with integrated shutter or attenuator, ensure that the shutter or attenuator is completely open. Gently introduce the fiber coupler into the vacant aperture.
- Page 3 Schäfter+Kirchhoff OPTICS, METROLOGY, AND PHOTONICS The holding screw together with the right-hand rule for the connector ensure a high reproducibility in mode field position and angle, the latter being important for polarization maintaining fibers. Collimating the Laser Beam Focus adjustment (adjustment of the coupling lens in z-direction) is a demanding task and should be preferably performed by use of a collimating telescope.
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