C-COR NA15T Series Procedures Manual - 2.2
10
Fiber Care and Cleaning
MX0860
Revision B
2.2
Fiber Cleaning
The quality of interconnections in fiber optic systems must be comparable to that of the optical fiber itself to
minimize attenuation and, thus, maximize the performance of the link. Connector loss, typically measured for
a mated pair of connectors, is caused by several conditions, such as lateral offset, end separation, angular
misalignment, and core diameter mismatch. Ensuring a clean optical fiber connection is critical.
The presence of dirt or lint at the interface between two fibers degrades performance significantly. Keep the
ends of fibers covered with dust caps when not in use to protect the fiber endfaces from dirt or damage.
Always follow standard laser safety procedures when handling or cleaning fiber and fiber cable connectors.
2.2.1
Cleaning Fiber Cable Connectors
1.
Wipe the fiber tip with a lint-free cloth (such as Kimwipes
®
) moistened with 99% isopropyl alcohol.
2.
Wipe the fiber tip with a new dry lint-free cloth or the dry side of the same lint-free cloth.
3.
Hold the can of compressed air specified above in an upright position, at an angle to the fiber tip,
and about 6 inches away from the connector.
4.
After spraying a few short bursts at the fiber tip, the connector is clean and ready for connection.
2.2.2
Cleaning Bulkhead Connectors
1.
Remove the bulkhead connector’s dust cover if necessary.
2.
Hold the can of compressed air with the specifications above about 6 inches away from the bulkhead
connector.
3.
After spraying a few short bursts directly into the connector, the connector is clean and ready to
accept a fiber connector.
Using compressed air improperly on fiber cable connectors or bulkhead connectors can
scratch the fiber endface or leave a residue and thereby degrade signal performance.
Dust caps do not keep connectors completely free of dust or contaminants. Perform the
procedures below each time fiber is handled and connections are made.
Use compressed air with at least the following specifications:
■
Non-residue, inert gas for precision dust removal
■
Ultra-filtered to <0.2 microns
■
Recommended for optical systems.
Follow the manufacturer’s directions and cautions when using compressed air to clean
fiber connectors.
Do not tilt, invert, or shake the can of compressed air during use.
Caution
Caution
MX0860.fm Page 10 Wednesday, August 25, 1999 1:34 PM