Integrated optical proximity coupler

Details Integrated optical proximity coupler Integrated optical proximity coupler

1992-12-18

1993-12-07

Bovernick, Rodney B.

Optical waveguides

With optical coupler

Particular coupling function

385 50, G02B 626

Patent

active

052689760

ABSTRACT:
The coupler comprises two waveguides imbedded in a substrate and exhibiting a coupling region of length L establishing coupling coefficients (C.sub.1) and (C.sub.2) for the signals of the wavelengths (.lambda..sub.1) and (.lambda..sub.2) respectively. Following the invention, the length (L) and the coefficients (C.sub.1) and (C.sub.2) are linked by the relationship: ##EQU1## where n and m are integers, one uneven and the other even, chosen in such a manner as to establish a pass band of predetermined width (BP1, BP2) around at least one of the wavelengths (.lambda..sub.1) and (.lambda..sub.2). The invention has application to multiplexers/demultiplexers for optical fiber telecommunications.

REFERENCES:
patent: 4652076 (1987-03-01), Unger
Cheng et al., "A Dual Wavelength (1.32-1.56 .mu.m) Directional Coupler Multiplexer by Ion Exchange in Glass.", IEEE Phototonics Technology Letters, vol. 2 No. 9, Sep. 1990, pp. 637-639, New York, U.S.
Najafi et al., "Potassium Ion Exchanged Glass Waveguide Directional Couplers at 0.6328 and 1.3 .mu.m", Applied Optics, vol. 28, No. 13, Jul. 1, 1989, pp. 2459-2460, New York, U.S.
Cheng et al., "Determination of the Coupling Length in Directional Couplers from Spectral Response", IEEE Phototonics Technology Letters, vol. 2, No. 11, Nov. 1990, pp. 823-825, New York, U.S.
Suzuki et al., "High Glass Waveguide Multi/Demultiplexers with Small Device Size and Low Wavelength Response Sensitivity", The Transactions of the Institute of Electronics, Information and Comm. Engineers, vol. E.73, No. 1, Jan. 1990, pp. 99-103, Tokyo, Japan.

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