Method and apparatus for optical isolation

Details Method and apparatus for optical isolation Method and apparatus for optical isolation

1994-08-29

1998-10-06

Shafer, Ricky D.

Optical: systems and elements

Optical modulator

Light wave temporal modulation

359282, 359298, 359484, 359487, 359494, 359495, 359497, 372703, G02B 530, G02B 2806, G02B 2728, G02F 109

Patent

active

058186263

ABSTRACT:
An optical isolator and circular polarizer are used in combination to optically isolate specular and diffuse reflections which result when a forward traveling radiation beam encounters an optical or non-optical boundary surface. The forward traveling radiation beam is linearly polarized with a linear polarizer such that its plane of linear polarization is aligned with a first polarization axis, then the axis of linear polarization is rotated to a second polarization axis with a polarization rotator and finally the linearly polarized forward traveling beam is circularly polarized with a quarter wave retarder.

REFERENCES:
patent: 3675125 (1972-07-01), Jaecklin
patent: 4963003 (1990-10-01), Hiiro
patent: 5048030 (1991-09-01), Hiiro
patent: 5052786 (1991-10-01), Schulz
patent: 5089786 (1992-02-01), Tamura
patent: 5504619 (1996-04-01), Okazaki
patent: 5574595 (1996-11-01), Kurata et al.

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