Schäfter+Kirchhoff 60FC-SF Series User manual

Fiber Collimators Series 60FC-SF
Adjustment_60FC-SF 09.12.2020 © Schäfter+Kirchhoff GmbH
Schäfter+Kirchhoff GmbH Kieler Str. 212 22525 Hamburg, Germany [phone] [email protected] www.sukhamburg.com
1
Fiber Collimators Series 60FC-SF
This document provides assistance in installing the fiber collimators series 60FC-SF. It describes how a fiber
cable is attached and how the collimation setting is adjusted.
1. Before You Start
The fiber collimator is shipped with a protection cap for the fiber receptacle and with a front cap.
Please remove all the protection caps first and do not use them as beam
dumps (risk of photo contamination).
Notice:
There is a two-part protection cap on the receptacle. For removing this cap perform the following steps in
oderto remove this cap:
Figure 1:
First, remove the threaded cap from
the fiber receptacle of the collimator.
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.
Figure 3:
Now please pull out the plug.

Fiber Collimators Series 60FC-SF
Adjustment_60FC-SF 09.12.2020 © Schäfter+Kirchhoff GmbH
Schäfter+Kirchhoff GmbH Kieler Str. 212 22525 Hamburg, Germany [phone] [email protected] www.sukhamburg.com
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Now make sure that the connector of the fiber you want to attach matches the receptacle type of the fiber
collimator:
• Use fibers with FC-APC (8°-polish) connectors for fiber collimators with an inclined coupling axis
(60FC-SF-4).
• Use fibers with FC-PC (0°-polish) connectors for fiber collimators with a coaxial axis (60FC-SF-0).
The fiber collimators are compatible to all fiber connectors type FC including fiber connectors with end caps.
• Do not touch either the optical surface of the lens or the fiber end-face.
• If the collimator is not in use, reattach both rear and front protection caps.
Notice:
Refer to the laser instruction manual for all instructions regarding laser
safety!
• Do not stare directly into the laser beam (which can cause permanent
damage to the eyes).
• Do not stare at the reflected beam from reflective objects.
• Do not point the laser beam to other individuals.
Caution!

Fiber Collimators Series 60FC-SF
Adjustment_60FC-SF 09.12.2020 © Schäfter+Kirchhoff GmbH
Schäfter+Kirchhoff GmbH Kieler Str. 212 22525 Hamburg, Germany [phone] [email protected] www.sukhamburg.com
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2. Attaching a Fiber Cable to the Fiber Collimator
For attaching a fiber cable to the fiber collimator perform the following steps:
Figure 4:
To prevent damage to the sensitive
fiber end-face, always insert the fiber
connector‘s ferrule Aat an angle, with
the connector key Bproperly aligned
to the receptacle notch C.
Figure 5:
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 collimator.
Figure 6:
Then, orient the connector key in a
way that it is pressed gently onto
the right-hand side of the receptacle
notch.
Figure 7:
Gently screw on the connector cap
nut onto the receptacle until it is
finger-tight.
A
B
C

Fiber Collimators Series 60FC-SF
Adjustment_60FC-SF 09.12.2020 © Schäfter+Kirchhoff GmbH
Schäfter+Kirchhoff GmbH Kieler Str. 212 22525 Hamburg, Germany [phone] [email protected] www.sukhamburg.com
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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 few microns, but necessary for inserting
the ferrule without force.
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 Series 60FC-SF
Adjustment_60FC-SF 09.12.2020 © Schäfter+Kirchhoff GmbH
Schäfter+Kirchhoff GmbH Kieler Str. 212 22525 Hamburg, Germany [phone] [email protected] www.sukhamburg.com
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3. Adjusting the Collimation Setting
Collimation adjustment (adjustment of the coupling lens in z-direction) is a demanding task and should
preferably be performed using a collimating telescope.
To check the collimation setting of the fiber collimator, couple a radiation source of appropriate wavelength into
the fiber connected to the fiber collimator. Direct the beam to a target about half a Rayleigh length zRaway:
zRπ∙∅2
beam
=
2 λ∙8
Here λ is the optical wavelength and Øbeam the collimated beam diameter (1/e2level).
Refer to the laser instruction manual for all instructions regarding laser
safety!
• Avoid staring directly into the laser beam (which can cause permanent
damage to the eyes).
• Avoid staring at the reflected beam from reflective objects.
• Avoid pointing the laser beam to other individuals.
Caution!
When correctly collimated, the laser spot diameter on a target about zR/2 away must have approximately the
same diameter such as the beam directly behind the fiber collimator. Additionally, make sure that there is no
focused spot between the collimator and the target at zR/2.
The collimation setting is adjusted by gently rotating the knurled ring. Adjust the collimation by minimizing the
size of the laser spot on the target about half the Rayleigh length zRaway.
Figure 9:
Adjust the focus setting by gently
rotating the knurled ring.
Please do not use the two radially arranged screws. These pin screws are
now used for a different purpose in the 60FC-SF fiber couplers than for the
previous version of the fiber couplers with fine-focusing mechanism 60FC-F.
They are to be used by Schäfter+Kirchhoff only! They are used for adjusting
the backlash of the fine adjustment mechanics and are NOT used for fixing
the collimation setting.
Notice:

Fiber Collimators Series 60FC-SF
Adjustment_60FC-SF 09.12.2020 © Schäfter+Kirchhoff GmbH
Schäfter+Kirchhoff GmbH Kieler Str. 212 22525 Hamburg, Germany [phone] [email protected] www.sukhamburg.com
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Figure 10:
Please do not use the two radially
arranged screws X.
There is no limit stop for the threaded nut. Stop rotating it further (clockwise)
as soon as a groove becomes visible bejond the threaded nut.
Notice:
Figure 11:
If a groove becomes visible bejond the
threaded nut you must stop rotating it
further.
X
X

Fiber Collimators Series 60FC-SF
Adjustment_60FC-SF 09.12.2020 © Schäfter+Kirchhoff GmbH
Schäfter+Kirchhoff GmbH Kieler Str. 212 22525 Hamburg, Germany [phone] [email protected] www.sukhamburg.com
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4. Adjustment Tools
For assembling and adjusting the fiber collimators series 60FC-SF you need the following tools:
Figure 12:
Screw driver type 9D-12
5. Accessories
Adapter ring type 12C-AM25 with an
outer diameter 25 mm for placing the
fiber collimator into a standard mirror
mount.

Fiber Collimators Series 60FC-SF
Adjustment_60FC-SF 09.12.2020 © Schäfter+Kirchhoff GmbH
Schäfter+Kirchhoff GmbH Kieler Str. 212 22525 Hamburg, Germany [phone] [email protected] www.sukhamburg.com
8
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.
• Schäfter+Kirchhoff GmbH and the Schäfter+Kirchhoff logo are registered trademarks.
• The specifications are subject to change; the manual is not covered by an update service.
• The system shown on the photos and drawings of this manual may differ in detail from the
system delivered.
Date of issue: 09.12.2020
Schäfter+Kirchhoff GmbH
Kieler Straße 212, 22525 Hamburg, Germany
Phone: [phone]
Fax: [phone]
Email: [e-mail]
Web: http://www.sukhamburg.com