Optical isolator device capable of preventing optical axis from

Details Optical isolator device capable of preventing optical axis from Optical isolator device capable of preventing optical axis from

1994-03-09

1996-05-21

Lerner, Martin

Optical: systems and elements

Polarization without modulation

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

359281, 372703, G02B 530, G02B 2728

Patent

active

055194672

ABSTRACT:
An optical isolator device comprises a magnet having a rectangular channel and a rectangular optical isolator element fitted in the channel and fixed to the magnet by adhesive filled up in a gap around the element in the channel. In order to avoid an increased thickness of the adhesive layer which is caused by round corners of the rectangular channel in production of the magnet by injection molding, the magnet is formed with a small slit outwardly extending from each corner of the rectangular channel. Thus, the optical isolator element is fitted in the channel without interference of the channel corners and is in close contact with at least one of flat inner surfaces of the channel to form a thin gap of 10 microns or less therebetween. Accordingly, the optical isolator element is strongly adhered to the inner surface of the channel by the thin adhesive layer of 10 microns or less in the thin gap. In another approach, each of corners of the channel in the magnet is round, but the optical isolator element is partially and obliquely cut away to form a facet at each of the corners of the rectangular shape thereof.

REFERENCES:
patent: 5161049 (1992-11-01), Tanno et al.
patent: 5305137 (1994-04-01), Ohkawara
patent: 5315431 (1994-05-01), Masuda et al.
patent: 5341235 (1994-08-01), Watanabe et al.

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