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Description / Abstract:
General
This procedure describes three methods by which the angular radiant
intensity (far field)
distribution from an optical fiber can be measured. Methods A and B
are angular scans of the far
field pattern; Method C is a scan of the spatial transform of the
angular intensity pattern.
Numerical Aperture
This measurement method can be used to collect data that may be used
in conjunction with FOTP-177
to determine the numerical aperture of graded-index multimode optical
fibers.
Hazards
This method may employ laser sources and requires fiber alignment.
Conform the design and operation
of test equipment to the requirements of ANSI Z136.1 and/or Z136.2.