Optical device
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United States of America Patent
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-
Jun 22, 1999
Grant Date -
N/A
app pub date -
Dec 30, 1996
filing date -
Feb 18, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An optical device comprises an optical fiber directional coupler having at least a first optical fiber optionally coupled at a coupling region to a second optical fiber such that light can propagate in the coupling region in at least two possible electromagnetic transmission modes; and means for transferring energy between the modes by a spatially periodic perturbation of at least a part of coupling region.
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