Method of making an index grating in an optical fiber, and a quasi-distributed array of sensors formed in said fiber
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United States of America Patent
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May 17, 1994
Grant Date -
N/A
app pub date -
Oct 3, 1991
filing date -
Feb 6, 1990
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An array of sensors quasi-distributed in an optical fiber (10), the sensors being delimited along the fiber by intermode coupling zones which are made by exposing the optical fiber (10) to a laser beam (16) through a mask (18) having periodic spatial transmission tuned to the difference between the propagation constants of the two modes to be coupled.
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