Method of and device for measuring return losses in optical fiber components
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United States of America Patent
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Jan 26, 1999
Grant Date -
N/A
app pub date -
Jan 22, 1998
filing date -
Feb 14, 1997
priority date (Note) -
Expired
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Abstract
A method of and an apparatus for measuring return loss in an optical fiber component. Radiation of a predetermined wavelength, e.g. from a laser, is launched into an optical fiber component, preferably through an optical fiber having a polarization control loop and the radiation reflected and the direct radiation are subjected to phase modification. An amplitude of the frequency component of the detected signal at the frequency imposed by phase modulation is measured and is used as the basis for evaluating the return loss.
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