Optical device

Details Optical device Optical device

1997-02-28

1999-11-09

Spyrou, Cassandra

Optical: systems and elements

Polarization without modulation

Polarization using a time invariant electric, magnetic, or...

359496, 359497, 385 11, G02B 530

Patent

active

059825391

ABSTRACT:
Light input from a first optical fiber is split up into two orthogonally-polarized beams by a polarizing prism. Their polarization planes are rotated by a 45-degree Faraday rotator. The beams are refracted by a birefringent wedge as extraordinary light, and finally output to a fourth optical fiber. The light output from the fourth optical fiber is refracted by a birefringent wedge as ordinary light, and enters a second optical fiber. Similarly, the light from the second optical fiber is led to a third optical fiber, thereby implementing a capability of an optical circulator. Light output from the first optical fiber can be input to the third optical fiber by inverting a rotation angle of the 45-degree Faraday rotator. As a result, it serves as a magneto-optical switch.

REFERENCES:
patent: 4548478 (1985-10-01), Shirasaki
patent: 4650289 (1987-03-01), Kuwahara
patent: 4852962 (1989-08-01), Nicia
patent: 5048937 (1991-09-01), Takeda et al.
patent: 5319483 (1994-06-01), Krasinski et al.
patent: 5446578 (1995-08-01), Chang et al.
patent: 5768005 (1998-06-01), Cheng et al.
M. Koga, "Compact Quarzless Quasi Optical Circulator", Electronics Letters, vol. 30, No. 17, Aug. 18, 1994.
Japanense Abstract No. 57-100410 (Dec. 15, 1980).
Japanese Abstract No. 60-130934 (Dec. 20, 1983).
M. Koga, et al. "Polarization-Insensitive High-Isolation Optical Nonreciprocal Device for Circulator Application", vol. 91, No. 61, pp. 1-6, (May 24, 1991).

Affiliated with

Also associated with

Rating

Optical device does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Optical device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical device will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1464295