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Polarization Independent All-fiber Optical Circulator
(U.S. Patent and Trademark Office, 1995-03-21)
There is provided an optical circulator (16) for bidirectional communication on a fiber optic communication transmission system. Polarization preserving single-mode fiber lengths (26), (28) connect all-fiber polarization ...
Polarization Independent Low Cross-talk Optical Circulator
(U.S. Patent and Trademark Office, 1994-06-07)
There is provided an optical circulator (16) for bidirectional communication on a fiber optic communication transmission system. A reflection rhomb (17) includes a polarizing thin film (26) and an inclined, internally ...