Inline optical circulators
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United States of America Patent
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Apr 23, 2002
Grant Date -
N/A
app pub date -
Apr 12, 2000
filing date -
Feb 24, 1999
priority date (Note) -
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Abstract
Inline optical circulators utilizing birefringent displacers to split an incoming beam into two orthogonally polarized beams and thereafter to recombine the beams. The birefringent displacers are used in combination with non reciprocal devices (Faraday rotators), reflectors and waveplates and serve to route a signal serially to the next port. Specific embodiments utilize birefringent wedges which provide circulators with reduced component counts and simplified alignment of the components. Circulators which do not utilize waveplates, and thus are relatively wavelength insensitive, are also described.
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