Optical in line filters
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United States of America Patent
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-
Aug 28, 1990
Grant Date -
N/A
app pub date -
Feb 23, 1989
filing date -
Feb 26, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An optical in-line filter comprises a first waveguide whose output end is coupled to a second, narrower waveguide such that light from the first waveguide of a predetermined waveband or wavebands only is passed to the second waveguide light of other wavebands emerging elsewhere from the open end of the first waveguide.
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