Schäfter+Kirchhoff Fiber Couplers 60FC-A19.5 Series Manual
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Fiber Couplers Series 60FC-A19.5
Fiber Couplers Series 60FC-A19.5
The Schäfter+Kirchhoff fiber couplers series 60FC-A19.5 collimate the radiation from a polarization-maintaining
single-mode fiber or from a multi-mode fiber.
This document provides assistance in installing and adjusting the fiber couplers series 60FC-A19.5. It
describes, how a fiber cable is attached and how the collimation setting is adjusted. Additionally it describes
how the series 60FC-A19.5 fiber couplers reversely are used as an in-coupler for multi-mode fiber cables.
1.
Before You Start
The fiber coupler is shipped with a protection cap for the fiber receptacle and with a front cap.
Notice:
There is a two-part protection cap on the receptacle. Please perform the following steps in order to remove
this cap:
Adjustment_60FC-A195
18.05.2021
Schäfter+Kirchhoff GmbH Kieler Str. 212 22525 Hamburg, Germany
Please remove all the protection caps first and do not use them as beam
dumps (risk of photo contamination).
© Schäfter+Kirchhoff GmbH
Figure 1:
First, remove the threaded cap from
the fiber receptacle of the fiber
coupler.
Figure 2:
Then, slightly loosen the small pin
screw. Use the screwdriver 9D-12.
Make sure to not loosen it too far, as it
is small and easily lost.
+49 40 85 39 97-0 info@sukhamburg.de www.sukhamburg.com
1
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Summary of Contents for Schäfter+Kirchhoff Fiber Couplers 60FC-A19.5 Series
- Page 1 Fiber Couplers Series 60FC-A19.5 Fiber Couplers Series 60FC-A19.5 The Schäfter+Kirchhoff fiber couplers series 60FC-A19.5 collimate the radiation from a polarization-maintaining single-mode fiber or from a multi-mode fiber. This document provides assistance in installing and adjusting the fiber couplers series 60FC-A19.5. It describes, how a fiber cable is attached and how the collimation setting is adjusted.
- Page 2 Fiber Couplers Series 60FC-A19.5 Figure 3: Now, pull out the plug. Now, make sure that the connector of the fiber you want to attach matches the receptacle type of the fiber coupler: • Use fibers with FC-APC (8°-polish) connectors for fiber couplers with an inclined coupling axis (60FC-A19.5-4).
- Page 3 Fiber Couplers Series 60FC-A19.5 Attaching a Fiber Cable to the Fiber Coupler For attaching a fiber cable to the fiber coupler perform the following steps: Figure 4: 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...
- Page 4 Fiber Couplers Series 60FC-A19.5 Figure 8: Finally, gently tighten the fiber grub screw to reduce the free play of the ferrule in the receptacle. The free play in between the connector ferrule and receptacle is only a few microns, but necessary for inserting the ferrule without force.
- Page 5 Fiber Couplers Series 60FC-A19.5 Here λ is the optical wavelength and Ø the collimated beam diameter (1/e level). beam When correctly collimated, the laser spot diameter on a target about z /2 away must have approximately the same diameter such as the beam directly behind the laser beam coupler. Additionally, make sure that there is no focused spot between the laser beam coupler and the target at z The lens position is adjusted by means of an eccentric key.
- Page 6 Fiber Couplers Series 60FC-A19.5 Figure 12: Finally, fix the two grub screws in order to lock the focus setting. Adapter for the Lateral Adjustment The fiber coupler can be connected to your laser system or optical bench by using an adapter flange or it can be attached directly to a multicube element from Schäfter+Kirchhoff.
- Page 7 Fiber Couplers Series 60FC-A19.5 Measure the power transmitted by this aperture. Maximize the transmitted power by laterally shifting the adapter. The adjustment is most sensitive if the aperture diameter is chosen to be about 70% of the collimated beam diameter (1/e Figure 15: Laterally shift the adapter in order to maximize the radiation that is trans-...
- Page 8 Fiber Couplers Series 60FC-A19.5 Connecting the Fiber Coupler to Your System Before you install the fiber coupler we recommend to measure the output power of the laser as a reference for the next steps. Now, perform the following steps: Figure 17: Locate the three radially arranged tapered pin screws in the adapter flange and loosen them using the hex...
- Page 9 Fiber Couplers Series 60FC-A19.5 Optimizing the Fiber Coupling When coupling into multi-mode fibers, the fiber couplers should produce a small focus at the fiber end-face. Thus, coupling a laser beam into a multi-mode fiber requires precise adjustment and needs some patience. Caution! Refer to the laser instruction manual for all instructions regarding laser safety!
- Page 10 Fiber Couplers Series 60FC-A19.5 Focus Setting in Case of High Power Levels If you have performed the previous steps described in chapters 1-5 (+ 6 if necessary), the fiber coupling to the mult-mode fiber is already optizimed. However, if the laser has a high power level it might be advisable to readjust the focus setting in a further step. With the default focus setting a small focus is produced exactly at the end-face of the fiber.
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Page 11: Adjustment Tools
Fiber Couplers Series 60FC-A19.5 Accessories Figure 26: Adapter type 60A19-5-F. Other adapter types are available. Adjustment Tools For assembling and adjusting the fiber couplers series 60FC-A19.5 you need the following tools: Figure 27: Screw driver type 9D-12, hex key 50HD-15, and eccentric key type 60EX-4 or type 60EX-5. - Page 12 Fiber Couplers Series 60FC-A19.5 Copyright • © Unless expressly authorized, forwarding and duplicating of the document and the utilization and communication of its contents are not permitted. Violations will entail an obligation to pay compensation. • All rights in the event of granting of patents or registration of a utility model. •...
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