Polarization-independent optical switches/modulators

Details Polarization-independent optical switches/modulators Polarization-independent optical switches/modulators

1978-03-24

1981-09-29

Lee, John D.

350374, G02B 5174

Patent

active

042919398

ABSTRACT:
Optical channel waveguide switches/modulators having polarization-independent operation are disclosed. Electrodes are disposed in proximity to the waveguide channels to provide an electric field that is primarily horizontally directed in at least one channel and an electric field that is primarily vertically directed in at least one channel. Since the different electric-field orientations electrooptically induce different changes in the index of refraction for waves of different polarization in the guides, this permits improved electrooptic control over both TM-like and TE-like modes. Embodiments of both modal interference switches/modulators and branching waveguide switches/modulators are disclosed.

REFERENCES:
patent: 3874782 (1975-04-01), Schmidt
patent: 3909108 (1975-09-01), Taylor
patent: 4012113 (1977-03-01), Kogelnik et al.
patent: 4070094 (1978-01-01), Martin
patent: 4157860 (1979-06-01), Marcatili
Burns et al., "Optical Modal Evolution 3-dB Coupler", Applied Optics, vol. 5, No. 4, Apr. 1976, pp. 1053-1065.
Kogelnik et al., "Switched Directional Couplers with Alternating .DELTA..beta.", IEEE Journ. Quant. Elect., vol. QE-12, No. 7. Jul. 1976, pp. 396-401.
Steinberg et al., "Performance Limitations Imposed on . . . ", Applied Optics, vol. 15, No. 10, Oct. 1976, pp. 2440-2453.
Steinberg et al., "Polarization-Insensitive Integrated-Optical Switches: . . . ", Applied Optics, vol. 16, No. 8, Aug. 1977, pp. 2166-2170.

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