Device for modulating optical radiation by a variable magnetic f

Details Device for modulating optical radiation by a variable magnetic f Device for modulating optical radiation by a variable magnetic f

1978-06-30

1980-12-02

Bauer, Edward S.

350 9612, 350151, 350355, G02B 514

Patent

active

042367824

ABSTRACT:
The device according to the invention comprises a wave guide formed by a thin layer of a ferrimagnetic garnet deposited onto a substrate, preferably by epitaxy, and capable of propagating first and second modes of radiated energy, means for exciting the first mode in said layer, means for inducing a magnetic field in the propagation direction to enable at least a fraction of the propagated energy to be transferred from the first mode towards the second mode, means for selectively transmitting one of the two modes situated in front of the guide, for example a metallic layer deposited onto the thin layer and means for extracting the energy of the transmitted mode.

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patent: 4032217 (1977-06-01), Coeure et al.
Hepner et al., "Magnetooptic Effects in Garnet Thin Film Waveguides", Applied Optics, vol. 14, No. 7, Jul. 1975, pp. 1479-1481.
Lohmann, "Magneto-Optical Light Fibers", IBM Tech. Discl. Bulletin, vol. 12, No. 6, Nov., 1969, pp. 788-789.
Tien et al., "Switching and Modulation of Light in . . . ", Appl. Phys. Ltr., vol. 21, No. 8, Oct. 1972, pp. 394-396.
Tseng et al., "Mode Conversion in Magneto-Optic Waveguides . . . ", Appl. Phys. Ltr., vol. 24, No. 6, Mar. 1974, pp. 265-267.

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