Polarization rotation compensator and optical isolator using the

Details Polarization rotation compensator and optical isolator using the Polarization rotation compensator and optical isolator using the

1986-08-25

1987-12-15

Punter, William H.

350405, G02F 109, G02B 2728

Patent

active

047128801

ABSTRACT:
A polarization rotation compensator and an optical isolator using the same are described. The optical isolator comprises a first birefringent wedge plate; a polarization rotation compensator composed of a combination of a half-wave plate whose principal axis is inclined at an angle of .theta./2 with respect to the plane of polarization of the incident light and a quarter-wave plate whose principal axis is inclined at an angle of .theta. with respect to the plane of polarization of the incident light; a Faraday rotator; and a second birefringent wedge plate; wherein the Faraday rotator, quarter wavelength plate, and half-wavelength plate are respectively arranged in the order of propagation of the backward light or of the forward light.

REFERENCES:
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patent: 4178073 (1979-12-01), Uchida et al.
patent: 4375910 (1983-03-01), Seki
Jerrard, H. G., "Transmission of Light Through Birefringent & Optically Active Media: The Poincare Sphere", Jr. Optical Soc. America, 8-1954, pp. 634-640.
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Williamson et al, "New High-Precision Photoelectric Universal Polarimeter & Birefringence Compensator", Jr. Optical Soc. Am., 3-1964, pp. 337-341.
Matsumoto, T., "Polarization-Independent Isolators for Fiber Optics", Electronics & Communications in Japan, vol. 62-C, #7, 1979, pp. 113-118.
Bennett et al, "Polarization", Section 10 of Handbook of Optics, Driscoll et al, editors, McGraw-Hill 1978, pp. 10-25 & 10-139-140, 10-103-10-106..
M. Shirasaki et al, "Bistable Magnetoptic Switch for Multimode Optical Fiber", Applied Optics, vol. 21, No. 11, Jun. 1, 1982, pp. 1943-1949, New York, US.

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