NKT Photonics Koheras BOOSTIK, Руководство по эксплуатации продукта

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Polishing
Figure 12 Optical fiber cleaning tool
Signs of damage
Indications of a damaged fiber facet may be due to one of the following:
•
Output power suddenly decreases.
•
The spectrum (recorded from an optical spectrum analyzer) is significantly
degraded compared to the original spectrum found in the measurement report.
•
The output beam shape (using a detector card) may be affected.
Beam shape
When the fiber facet is clean and undamaged, the emitted beam has a discernible
shape when using a detector card to view it. An Incorrect beam shape or profile
occurs as a result of a damaged or dirty fiber facet. In this case, the emitted beam is
random in direction and may even show variation in color.
Damaged facet
If the fiber facet is damaged, the connector must be re-polished before operating the
laser. Failing to do so, could result in incorrect measurements/usage or even damage
to the laser unit itself.
Caution: The connector attached to the fiber should NOT be removed, special equip-
ment and procedures are required to fit a new connector with the fiber.
Polishing
The output fiber can be polished using proper equipment; however, you must be
careful not to over polish and generally NKTP recommends to return the unit for
factory polishing.
The general procedure is to:
1. Clean the connector and quickly and very lightly, polish the connector end.
Caution: Do not over-polish the connector end (fiber facet). Over-polishing the
connector end will damage it.
2. Inspect the fiber facet for contamination and damage using a microscope.
(Ensure the module is off.)
3. After inspection, if any contamination or damage is still present repeat steps 1
and 2.