8163A/B, 8164A/B, 8166A/B User’s Guide 435
Cleaning Instructions 15
How to clean connectors
Cleaning connectors is difficult as the core diameter of a single-mode fiber
is only about 9 μm. 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.
Please pay attention to the following laser safety warnings:
• Do not switch on the instrument when there is no termination to the
optical output connector, to the optical fiber or to the attached
device. The laser radiation can seriously damage your eyesight.
• The use of other optical instruments with this product will increase
the hazard to your eyes.
• 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.
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