Loop optical circulator
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United States of America Patent
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Jun 8, 2004
Grant Date -
Jan 9, 2003
app pub date -
Jul 5, 2001
filing date -
Jul 5, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A four-port loop optical circulator includes a first, a second, a third and a fourth optical ports for receiving optical beam therein. The circulator further includes a plurality of optical components. The optical components include a walk-off crystal for generating a vertical optical path displacement for a vertical polarized optical beam and for passing a horizontally polarized optical beam therethrough maintaining a same optical path. The optical components also include a vertical displacement device for shifting an optical path along a vertical direction with a predefined vertical displacement for an optical beam transmitted with a particular polarization. The vertical displacement device is coupled to the walk-off crystal for guiding a beam received from the fourth port to project from the first port.
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