Optical isolator

Details Optical isolator Optical isolator

1992-04-21

1993-11-16

Arnold, Bruce Y.

Optical: systems and elements

Polarization without modulation

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

359495, 359497, 359282, G02B 530

Patent

active

052628922

ABSTRACT:
In an optical isolator, first, second and third birefringent crystals shaped in a flat plate are arranged in order in a forward direction in which a light beam advances and formed in ratios 1:1:1 in thickness. One magneto-optical member is interposed between the first and second birefringent crystals and another magneto-optical member may be arbitrarily disposed between the second and third birefringent crystals. Since the birefringent crystals are equal in thickness, the optical isolator can be readily produced with a high accuracy without much labor.

REFERENCES:
patent: 3438692 (1969-04-01), Tabor
patent: 3540795 (1970-11-01), Harris
patent: 4178073 (1979-12-01), Uchida et al.
patent: 4239329 (1980-12-01), Matsumoto
patent: 4461543 (1984-07-01), McMahon
patent: 4548478 (1985-10-01), Shirasaki
patent: 4974944 (1990-12-01), Chang
patent: 4988170 (1991-01-01), Buhrer
patent: 5151955 (1992-09-01), Ohta et al.
"Polarization Independent Isolator Using Spatial Walkoff Polarizers", Kok Wai Chang and Wayne V. Sorin, IEEE Photonics Technology Letters, vol. 1, No. 3, Mar., 1989.

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