Optical polarizer

Details Optical polarizer Optical polarizer

1980-06-25

1982-11-16

Lee, John D.

350385, G02B 5174

Patent

active

043592600

ABSTRACT:
An optical polarizer is described in which a propagation layer (14) is covered with a dielectric buffer layer (16) and a metal layer (18). The thickness of the buffer layer is chosen so as to increase the attenuation of TM modes of radiation in the waveguide relative to TE modes. In accordance with the invention, additional discrimination between TM and TE modes is achieved by segmenting the metal layer into a plurality of tandem sections (18.1, 18.2, 18.3), thereby increasing the mode coupling loss for TM modes. A GaAs-AlGaAs rib waveguide polarizer is specifically described.

REFERENCES:
Appl. Phys. Lett., vol. 36, No. 4, Feb. 15, 1980, Reinhart et al., "MOS Rib Waveguide Polarizers", pp. 237-240.
Appl. Phys. Lett., vol. 24, No. 6, Mar. 15, 1974, Reinhart et al., "Transmission Properties of Rib Waveguides Formed . . . ", pp. 270-272.
IEEE Journal of Quantum Electronics, vol. QE-11, No. 9, Sep. 1975, "Characteristics of Optical Guided Modes in Multilayer . . . ", pp. 729-736.
Applied Optics, vol. 13, No. 2, Feb. 1974, Kaminow et al., "Metal-Clad Optical Waveguides: Analytical and Experimental Study", pp. 396-405.

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