Optical isolator and polarization splitter therefor

Details Optical isolator and polarization splitter therefor Optical isolator and polarization splitter therefor

1994-10-11

1996-03-12

Lee, John D.

Optical waveguides

Polarization without modulation

359488, 359494, 385 15, G02B 627

Patent

active

054993075

ABSTRACT:
An optical isolator having no dependence on direction of plane of polarization is provided by using a pair of polarization splitters, each comprising at least two parallel optical waveguides, and a birefringent crystal plate inserted in a groove formed obliquely in said waveguides. A plane formed by said two optical waveguides is parallel to vector normal to the incident surface of said birefringent crystal plate, the optical axis of said birefringent crystal plate is also parallel to said plane, and the following relationship is substantially satisfied:

REFERENCES:
patent: 4239329 (1980-12-01), Matsumoto
patent: 4712880 (1987-12-01), Shirasaki
patent: 4761050 (1988-08-01), Byron
patent: 4974944 (1990-12-01), Chang
patent: 4978189 (1990-12-01), Blonder et al.
patent: 4988170 (1991-01-01), Buhrer
patent: 5033830 (1991-07-01), Jameson
patent: 5267078 (1993-11-01), Shiraishi et al.

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