Optical: systems and elements – Optical modulator – Light wave temporal modulation
Patent
1991-11-26
1993-05-18
Lerner, Martin
Optical: systems and elements
Optical modulator
Light wave temporal modulation
359484, 359496, G02B 530, G02F 109
Patent
active
052125866
ABSTRACT:
An optical circulator which includes a first birefringent plate for receiving an incident beam of light from a first port, a Faraday rotator, a polarization transforming device, and a second birefringent plate immediately adjacent a second port and the polarization transforming device. The optical circulator further includes means for diverting light traveling from the second port to a direction of travel which is at a right angle to the prior direction of travel, whereby the light is directed to a third port. The diverting means is immediately adjacent the first birefringent plate and the first port, and permits the clear passage of light from the first port to the first birefringent plate. The optical circulator has a simplified design while providing for the efficient transmission of polarized light.
REFERENCES:
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patent: 4464022 (1984-08-01), Emkey
patent: 4650289 (1987-03-01), Kuwahara
patent: 4988170 (1991-01-01), Buhrer
patent: 4991938 (1991-02-01), Buhrer et al.
Shirasaki et al., "Compact Polarization-Independent Optical Circulator," Applied Optics, vol. 20, No. 15, Aug. 1, 1981, pp. 2683 to 2687.
Bain John N.
Lerner Martin
Lillie Raymond J.
Optics for Research
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