Article comprising a variable optical attenuator

Details Article comprising a variable optical attenuator Article comprising a variable optical attenuator

1999-05-03

1999-11-02

Spyrou, Cassandra

Optical: systems and elements

Polarization without modulation

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

359321, 359324, G02B 530

Patent

active

059781351

ABSTRACT:
In an arrangement substantially like an optical isolator, appropriate choice of the composition of the magneto-optic element can result in a variable optical attenuator. The composition is selected to vary in the direction of light propagation, and also is selected such that the magneto-optic element comprises a compensation wall. The compensation wall is movable in response to a change in the temperature of the magneto-optic element, whereby the attenuation of the device is changed.

REFERENCES:
patent: 4218762 (1980-08-01), Haisma et al.
patent: 4981341 (1991-01-01), Brandle, Jr. et al.
patent: 5608570 (1997-03-01), Brandle, Jr. et al.
Wolfe et al., Appl. Phys. Lett. "Fiber Optic Magnetic Sensor Based on Domain Wall motion in Garnet Film Waveguides", vol. 58(16), pp. 1733-1735, Apr. 22, 1991.
Fukushima et al., OSA TOPS on Optical Amplifiers and Their Applications, Optical Society of America, "Non-Mechanical Variable Attenuator Module Using Faraday Effect", vol. 5, pp. 249-252, 1996.
Winkler, Vieweg Tracts in Pure and Applied Physics, Magnetic Garnets, vol. 5, 1981.

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