Planar lightwave wavelength device using moveable mirrors

Details Planar lightwave wavelength device using moveable mirrors Planar lightwave wavelength device using moveable mirrors

2005-09-13

2005-09-13

Connelly-Cushwa, Michelle R. (Department: 2874)

Optical waveguides

With optical coupler

Switch

C385S001000, C385S047000, C385S140000

Reexamination Certificate

active

06944366

ABSTRACT:
A method and apparatus are disclosed for adjusting the phase of an optical signal by varying the path length of the optical signal using one or more moveable mirrors. The phase adjustment techniques of the present invention may be employed in various optical devices, including 1×n optical switches. The position of the mirrors may be controlled, for example, using micromachined control elements that physically move the mirror along the lightpath. An exemplary 2-by-2 optical switch includes two waveguides configured to include a coupler region. A mirror is positioned at the output of each waveguide. The position of at least one of the mirrors may be adjusted along the optical path and the mirrors reflect the light exiting from the end of the waveguides back into the same waveguide after an adjustable phase delay due to the round trip through an adjustable air gap between the waveguides and corresponding mirrors.

REFERENCES:
patent: 4904042 (1990-02-01), Dragone
patent: 5949571 (1999-09-01), Goossen et al.
patent: 5974207 (1999-10-01), Aksyuk et al.
patent: 6049640 (2000-04-01), Doerr
patent: 2003/0095777 (2003-05-01), Janssen

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