Acoustooptic filter

Details Acoustooptic filter Acoustooptic filter

2004-04-22

2008-03-11

Connelly-Cushwa, Michelle (Department: 2874)

Optical waveguides

Directional optical modulation within an optical waveguide

Acousto-optic

C359S305000, C359S308000

Reexamination Certificate

active

07343056

ABSTRACT:
An acoustooptic filter1having an optical waveguide3disposed on an upper surface2aof an acoustooptic substrate2, an interdigital electrode4which excites a surface wave disposed on the acoustooptic substrate2, a surface wave waveguide for the surface wave excited by the interdigital electrode4extends in substantially the same direction as the optical waveguide, and a mode of the light guided to the optical waveguide3is converted by the surface wave. The acoustooptic filter1includes a thin-film ridge5as a phase match condition changer that changes a phase match condition at a mutual action area by 0.235% or more from a state in which phases are matched, the mutual action area being an area where the surface acoustic wave and the light guided to the optical waveguide3act upon each other.

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Written Opinion for corresponding international application (with English translation).
David A. Smith and John J. Johnson, “Low Drive-Power Integrated Acoustooptic Filter on X-Cut Y-Propagating LiNbO3” (IEEE Photonics Technology Letters, vol. 3, No. 10, Oct. 1991, pp. 923-925).
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