Optical circulators

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Details

350 9613, 350370, 350394, 350400, G02F 100, G02B 530

Patent

active

042945097

ABSTRACT:
An optical circulator in which a cubic prism for a signal coupler, a lens-like magneto-optic structure, and a reflecting structure are utilized as important constituents acts a role of circulation in optical region. Basic features of the optical circulator are such that a signal light cumulatively effects the Faraday rotation on repeated passages through the magneto-optic structure and therefore a shortened magneto-optic structure will provide sufficient roles in performing a circulator action, and furthermore, such multiple passage of the signal light will introduce useful resonant modes in the magneto-optic structure in order to produce operating modes which can achieve various multiple circulation frequency operations in the optical region. And also the optical circulator has low loss characteristics and broad availability especially in the field of optical communication.

REFERENCES:
patent: 4143939 (1979-03-01), Desormiere et al.
patent: 4153328 (1979-05-01), Wang
patent: 4168107 (1979-09-01), Sauter
patent: 4221460 (1980-09-01), Hepner et al.

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