Birefringence diffraction grating type polarizer

Details Birefringence diffraction grating type polarizer Birefringence diffraction grating type polarizer

1989-06-28

1991-07-09

Hille, Rolf

350 9619, 35016217, G02B 612

Patent

active

050299883

ABSTRACT:
A birefringence diffraction grating type polarizer is composed of an optically anisotropic sheet crystal substrate. The optically anisotropic sheet crystal substrate is provided with periodical ion-exchanged regions on the main plane thereof, thereby providing an optical diffraction grating. The ion-exchanged regions are covered with dielectric layers, respectively, and further diffused in the vicinity of the surface thereof with metal. Utilizing this structure, it a linearly polarized incident light does not become an elliptically polarized light.

REFERENCES:
patent: 4707059 (1987-11-01), Ogura et al.
"10 GHZ Bandwidth Traveling-Wave LiNbO.sub.3 Optical Waveguide Modulator"--Izutsu et al.--IEEE Journal of Quantum Electronics, vol. QE-14, No. 6, Jun. 1978, pp. 394-395.
"Efficient Prism-Couping into Titanium Diffused Lithium Niobate Optical Waveguides"--Sohler et al.--Wave Electronics-3 (1979), 269-275, Apr.-1979.

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