Optical waveguide device with two predetermined wavelength, pola

Details Optical waveguide device with two predetermined wavelength, pola Optical waveguide device with two predetermined wavelength, pola

1991-07-08

1992-09-15

Healy, Brian

Optical waveguides

With optical coupler

Particular coupling structure

385 11, 385 16, 385 40, 385130, 385 14, G02B 610

Patent

active

051485079

ABSTRACT:
In an optical waveguide device, a plurality of optical directional coupler switches are provided on a substrate, and light input and output terminals are also provided to be coupled to the optical directional coupler switches. Each of the optical directional coupler switches is provided with a pair of parallel waveguides. One of the optical directional coupler switches operates independently of the polarization of light having a first predetermined wavelength by defining a width of the parallel waveguides and a distance therebetween to be first predetermined values, and one of the optical directional coupler switches operates independently of the polarization of light having a second predetermined wavelength by defining a width of the parallel waveguides and a distance therebetween to be second predetermined values. The parallel waveguides of the first and second ones of the optical directional coupler switches are provided by diffusing films of the same thickness deposited in a predetermined pattern on the substrate thereinto by a predetermined diffusing condition.

REFERENCES:
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IEEE Journal of Quantum Electronics vol. QE-22, No. 6, Jun. 1986, pp. 933-938, New York, US; J. J. Veselka et al.: "Optimization of Ti:LiNBO3 Optical Waveguides and Directional Coupler".
Electronics Letter, vol. 23, No. 21, Oct. 8, 1987, pp. 1167-1169.
"Low Drive Voltage, Low Crosstalk . . . Optical Waveguide" 1988 Technical Digest Series, vol. 5, Mar. 28, 1988, pp. 240-243.
"Low Crosstalk and Polarization Independent . . . Switch for OTDR".

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