Optical passive components

Details Optical passive components Optical passive components

1993-05-12

1996-03-12

Shafer, Ricky D.

Optical: systems and elements

Optical modulator

Light wave temporal modulation

359484, 359495, 372703, 385 11, 385 27, 385 31, 385 34, G02B 530, G02B 628, G02F 109

Patent

active

054991323

ABSTRACT:
An object of the present invention is to provide an optical passive component having a polarization-independent optical isolator for constituting an optical fiber amplifier and exhibiting an optical isolator function. At least first and second optical fibers for input and output of light rays, a birefringent crystal, a lens for converting the input light rays into nearly collimated rays, a magnetooptical crystal for receiving a magnetic field so as to rotate by .pi./8+N.pi./4(n=0, 1, . . . ) the polarization direction of the input light rays, and a reflector are disposed in order. A half wave plate is provided to cover one portion of the ray path between the above described birefringent crystal and the above described lens.

REFERENCES:
patent: 4770505 (1988-09-01), Okazaki
patent: 4941738 (1990-07-01), Olsson
patent: 4963003 (1990-10-01), Hiiro
patent: 5033830 (1991-07-01), Jameson
patent: 5044713 (1991-09-01), Mozer et al.
patent: 5048030 (1991-09-01), Hiiro
patent: 5089786 (1992-02-01), Tamura
patent: 5299056 (1994-03-01), Kurata et al.

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