Variable-waveguide optical branching filter

Details Variable-waveguide optical branching filter Variable-waveguide optical branching filter

1988-06-23

1989-10-17

Gonzalez, Frank

350 9613, 350 9614, G02B 634

Patent

active

048742163

ABSTRACT:
A variable-waveguide optical branching filter is disclosed, in which a diffraction grating is formed in the cross region of two crossing waveguides, only light of a particular wavelength which is determined by the period of the diffraction grating is branched to a desired one of the waveguides, and the refractive index of the cross region is changed by control of a voltage or a current, or by way of irradiation with light, thereby changing the wavelength of light to be branched.

REFERENCES:
patent: 4673241 (1987-06-01), Nishiwaki et al.
patent: 4747654 (1988-05-01), Yi-Yan
patent: 4750801 (1988-06-01), Alferness

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