Integrated optical polarization splitter

Details Integrated optical polarization splitter Integrated optical polarization splitter

1991-01-25

1991-10-15

Gonzalez, Frank

Optical waveguides

Directional optical modulation within an optical waveguide

Electro-optic

385132, 385 16, G02B 610

Patent

active

050568833

ABSTRACT:
The invention relates to an integrated optical polarization splitter based on the mode filter principle, in which the asymmetry, necessary therefor, of the waveguides is obtained by using a polable glassy polymer as optical waveguide material, which material is polarization-sensitive in the poled state and is not, or virtually not polarization-sensitive in the unpoled state. A Y-shaped optical waveguide pattern 8 of polable glassy polymer comprises a continuous optical waveguide formed by the optical waveguide sections 8.1 (incoming) and 8.2 (outgoing) in which the polymer is in the unpoled state and an outgoing optical waveguide section 8.3 which connects to said optical waveguide at an acute angle and in a tapered fashion and in which the polymer is in the poled state. Since the poled material is also electro-optical, an electric field, for example generated between electrodes 2 and 10, can still correct any small deviations in the asymmetry. Advantages are simple production, with relatively high tolerances, and a short integration length of the component.

REFERENCES:
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patent: 4070092 (1978-01-01), Burns
patent: 4772084 (1988-09-01), Bogert
patent: 4869569 (1989-09-01), Kapon
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patent: 5007696 (1991-04-01), Thackara et al.
SPIE, vol. 971, Nonlinear Optical Properties of Organic Materials, (1988), R. Lytel et al., pp. 218-229.
IEE Proceedings, vol. 136, Pt. J., No. 3, Jun. 1989, P. Kaczmarski, "Design of an Integrated Electro-Optic Switch in Organic Polymers", pp. 152-158.
Journal of Lightwave Technology, vol. 7, No. 10, Oct. 1989, N. Goto et al., "A TE-TM Mode Splitter in LiNbO.sub.3 by Proton Exchange and Ti Diffusion", pp. 1567-1574.

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