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Keysight DFB Laser Source Module User’s Guide
4
Cleaning Information
How to clean connectors
Cleaning connectors is difficult as the core diameter of a single-mode fiber
is only about 9 mm. This generally means you cannot see streaks or
scratches on the surface. To be certain of the condition of the surface of
your connector and to check it after cleaning, you need a microscope.
In the case of scratches, or of dust that has been burnt onto the surface of
the connector, you may have no option but to polish the connector. This
depends on the degree of dirtiness, or the depth of the scratches. This is a
difficult procedure and should only be performed by skilled personal, and
as a last resort as it wears out your connector.
To assess the projection of the emitted light beam you can use an infrared
sensor card. Hold the card approximately 5 cm from the output of the
connector. The invisible emitted light is project onto the card and becomes
visible as a small circular spot.
Preferred Procedure
Use the following procedure on most occasions:
1 Clean the connector by rubbing a new, dry cotton-swab over the
surface using a small circular movement.
2 Blow away any remaining lint with compressed air.
WARNING
Never look into the end of an optical cable that is connected to an active
source.
