Integrated-optic device and a method for attenuating light...

Details Integrated-optic device and a method for attenuating light... Integrated-optic device and a method for attenuating light...

2005-04-26

2005-04-26

Kang, Juliana K. (Department: 2874)

Optical waveguides

With optical coupler

Input/output coupler

C002S008600, C002S010000

Reexamination Certificate

active

06885791

ABSTRACT:
An integrated-optic attenuator/equalizer device comprising a photorefractive substrate, at least one optical waveguide channel formed in the substrate, at least one diffractive-Bragg grating formed in the substrate, and a diffractive-Bragg grating modulator that is capable of modulating the diffractive Bragg grating(s). The diffractive-Bragg grating(s) intersects the optical waveguide channel. When a diffractive-Bragg grating formed in the substrate is modulated, at least a fraction of light of a wavelength associated with the modulated diffractive-Bragg grating is re-directed by the modulated diffractive-Bragg grating, thereby preventing the re-directed fraction of light from arriving at the output of the optical waveguide channel. Multiple diffractive-Bragg gratings may be implemented in the integrated-optic device, each having a particular wavelength associated therewith, and the diffractive-Bragg gratings may be simultaneously or independently modulated to control the fractions of light of different wavelengths that arrive at the output of the optical waveguide channel.

REFERENCES:
patent: 5706375 (1998-01-01), Mihailov et al.
patent: 5781670 (1998-07-01), Deacon et al.
patent: 6181840 (2001-01-01), Huang et al.
patent: 6510167 (2003-01-01), Jain et al.
patent: 6594421 (2003-07-01), Johnson et al.
patent: 20020197013 (2002-12-01), Liu et al.

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