Optical waveguides – Temporal optical modulation within an optical waveguide – Electro-optic
Patent
1991-12-26
1993-03-09
Lee, John D.
Optical waveguides
Temporal optical modulation within an optical waveguide
Electro-optic
385 2, G02B 610
Patent
active
051931281
ABSTRACT:
An optic intensity modulator includes a substrate of an optic material that is conductive to light and acoustic waves and has both electrooptic and piezoelectric properties. A pair of associated elongated light waveguides is formed in the substrate, with the waveguides extending substantially coextensively with one another, and being separated from one another by a transverse distance that gradually varies along the courses of the waveguides. Each of two portions of light of substantially identical properties is launched into one of the waveguides for propagation longitudinally thereof, and different phase shifts are induced in the light portions as they propagate in the waveguides by imposing different variable electric fields onto each of the waveguides. The light portions are combined with one another subsequently to their emergence from the waveguides with attendant amplitude modulation of the combined output light due to interference between such phase-shifted light portions.
REFERENCES:
patent: 4684207 (1987-08-01), Lawless
patent: 4984861 (1991-01-01), Suchoski, Jr. et al.
Farina James D.
Suchoski Paul G.
Heartney Phan T.
Lee John D.
Ruzek Peter R.
United Technologies Corporation
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