Acousto-optic filter

Details Acousto-optic filter Acousto-optic filter

2009-03-06

2011-10-11

Hahm, Sarah (Department: 2874)

Optical waveguides

Directional optical modulation within an optical waveguide

Acousto-optic

Reexamination Certificate

active

08036499

ABSTRACT:
Optical waveguides are provided on a substrate, a thin film whose refractive index is optically less than the refractive indices of the optical waveguides is provided on the surface of the substrate, and a surface-acoustic-wave waveguide is arranged on the thin film so as to cross the optical waveguides in a direction oblique thereto. The optical waveguides are not directly influenced by the location of the SAW waveguide and the phase matching condition of the optical waveguides is not changed, whereby the sidelobe characteristic of an optical filter is not degraded by assigning weights to the SAW intensity.

REFERENCES:
patent: 5652809 (1997-07-01), Aronson
patent: 5677971 (1997-10-01), Okayama et al.
patent: 6400881 (2002-06-01), Seino et al.
patent: 2005/0286826 (2005-12-01), Tsunoda et al.
patent: 05-323248 (1993-12-01), None
patent: 08-114776 (1996-05-01), None
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patent: 2004-219589 (2004-08-01), None
patent: 2005/003847 (2005-01-01), None
Official Communication issued in International Patent Application No. PCT/JP2007/067483, mailed on Nov. 27, 2007.
Official Communication issued in corresponding European Patent Application No. 07806924.2, mailed on Oct. 8, 2009.

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