Optical wavelength filter

Details Optical wavelength filter Optical wavelength filter

1997-12-16

1999-11-23

Lee, John D.

Optical waveguides

Polarization without modulation

385 7, G02B 614

Patent

active

059914726

ABSTRACT:
The present invention provides an optical wavelength filter, in which the light of a particular wavelength in a first linear polarization inputted from the input end of an optical waveguide formed near the surface of a substrate is transformed into a second linear polarization perpendicular to the first linear polarization by means of an elastic surface wave generated by a reed screen type electrode composed of a plurality of finger electrode portions formed on the input end side of the optical waveguide, and said plurality of finger electrode portions formed in a circular arc shape are disposed each having an angle for correcting the deflection of the propagation direction of the elastic surface wave so that the elastic surface wave converges at a desired position.

REFERENCES:
patent: 4532632 (1985-07-01), Yamashita et al.
patent: 5002349 (1991-03-01), Cheung et al.
patent: 5677971 (1997-10-01), Okayama et al.
Arjun Kar-Roy et al., IEEE Photonics Technology Letters, vol. 4, No. 10, Low-Sidelobe Weighted-Coupled Integrated Acoustooptic Tunable Filter Using Focused Surface Acoustic Waves, Oct. 1992, pp. 1132-1135.

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