Optical isolator

Details Optical isolator Optical isolator

1992-12-30

1994-05-24

Lerner, Martin

Optical: systems and elements

Optical modulator

Light wave temporal modulation

359484, 359495, 372703, G02B 530, G02F 109

Patent

active

053154312

ABSTRACT:
A non-reciprocal unit and a parallel-surfaced flat birefringent plate are provided between incident side and outgoing side fiber collimators. The non-reciprocal unit is formed by disposing two tapered birefrigent plates, one on each side of a 45.degree. Faraday rotator consisting of a cylindrical permanent magnet and a magneto-optical element housed in the magnet. The optical axes of the parallel-surfaced flat birefringent plate and adjacent tapered birefringent plate are staggered from each other by 90.degree.. The thickness of the parallel-surfaces birefringent plate is set equal to the sum of the thicknesses of the two tapered birefringent plates.

REFERENCES:
patent: 4548478 (1985-10-01), Shirasaki
patent: 4852962 (1989-08-01), Nicia
patent: 4909612 (1990-03-01), Scerbak et al.

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