Electro-optical tunable filter

Details Electro-optical tunable filter Electro-optical tunable filter

1993-09-28

1995-06-27

Bovernick, Rodney B.

Optical waveguides

With optical coupler

Particular coupling structure

G02B 626

Patent

active

054287014

ABSTRACT:
An optical filter comprises a light waveguide and an electrode structure located adjacent the waveguide. The electrode structure comprises a first ladder arrangement having a plurality of rungs disposed along the length of the waveguide and spaced apart from each other, each rung of the first ladder arrangement comprising a plurality of interdigitated electrode pairs. A second ladder arrangement has a plurality of rungs interleaved with the rungs of the first ladder arrangement and spaced apart from each other by a second pitch spacing that is different from the first pitch spacing.

REFERENCES:
patent: 4327971 (1982-05-01), Kondo et al.
patent: 4415226 (1983-11-01), Verber et al.
patent: 4422088 (1983-12-01), Gfeller
patent: 4966431 (1990-10-01), Heismann
patent: 4988169 (1991-01-01), Walker
patent: 5218653 (1993-06-01), Johnson et al.
I.E.E.E. Journal of Quantum Electronics, vol. QE-24, No. 1, Jan., 1988, pp. 83-93, "Wavelength-Tunable Electrooptic Polarization Conversion in Birefringent Waveguides", F. Heismann et al.
I.E.E.E. Photonics Technology Letters, vol. 3, No. 3 Mar., 1991, pp. 219-221, "Mirror-Folded Polarization-Independent Wavelength Filter", F. Heismann et al.
Electronics Letters, vol. 29, No. 2, Jan. 21, 1993, pp. 157-159, "Lithium Niobate Electro-Optic Tunable Filter With High Sidelobe Suppression", I. R. Croston et al.
Proceedings of the Spie--Integrated Optical Circuit Engineering III, vol. 651, Apr. 1986, pp. 139-146, "Spatially-Variant Coupling Design for Co-Directional Mode-Converting Bandpass Filters", D. P. Morgan.

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