Spectral filter for integrated optics

Details Spectral filter for integrated optics Spectral filter for integrated optics

1985-02-04

1987-10-20

Laroche, Eugene R.

350 9614, G02B 610

Patent

active

047010096

ABSTRACT:
A spectral filter for an integrated optic application, such as in an optical demultiplexer (14), is provided and includes a common input waveguide (20) integrally connected to a pair of optical output waveguides (22, 24). The material selected for the output waveguides (22, 24) can be semiconductor material that provides a low index of refraction for a specific wavelength in one output waveguide and a relatively higher index of refraction for the same wavelengths in the other output waveguide, the output waveguide materials being interrelated in that they have a common index of refraction for at least one wavelength across the spectrum of radiation. An incident spectrum of radiation (16) can be split into at least a pair of bandwidths of radiation to provide a spectral filter function.

REFERENCES:
patent: 3909108 (1975-09-01), Taylor
patent: 4146297 (1979-03-01), Alferness et al.
patent: 4223977 (1980-09-01), Papuchon et al.
patent: 4279464 (1981-07-01), Colombini

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