US3877782A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electro-optical thin film device
Assignee: AT&T Inc
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Filing: 1974-01-23
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Granted: 1975-04-15
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Expires: 1994-01-23
Abstract
Abstract The static loss characteristics of an integrated optical thinfilm converter that includes an interdigital electrode grating are reduced by insuring that the optical transmission path in the thin film does not pass below any portion of the electrode grating.
Inventors
- 👤 Ivan Paul Kaminow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:39
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/03; G02F1/035; G02F1/0353; G02B; G02B6/00; G02B6/24; G02B6/26; G02B6/30; G02F1/0136; G02F1/0142; G02F2201/00; G02F2201/12; G02F2201/124
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
138 words
In combination in an integrated optical device, electro-optic thin-film means defining a longitudinally extending optical waveguiding path whose lateral extent is defined approximately by first and second longitudinal reference lines, and electrode means for establishing along a portion of said longitudinally extending waveguiding path a spatially periodic refractive index variation, said electrode means comprising plural longitudinally spaced-apart pairs of facing electrode fingers, the fingers of each such facing pair being spaced apart laterally the distance between said first and second longitudinal reference lines to encompass therebetween a portion of said waveguiding path, and further including a substrate, wherein said thin-film means comprises a thin-film longitudinal ridge of an electro-optic material on said substrate, and wherein said electrode fingers are disposed on said substrate such that the facing ends of said fingers respectively abut the sides of said ridge.
Claim 2
Dependent Claim
138 words
In combination in an integrated optical device, electro-optic thin-film means defining a longitudinally extending optical waveguiding path whose lateral extent is defined approximately by first and second longitudinal reference lines, and electrode means for establishing along a portion of said longitudinally extending waveguiding path a spatially periodic refractive index variation, said electrode means comprising plural longitudinally spaced-apart pairs of facing electrode fingers, the fingers of each such facing pair being spaced apart laterally the distance between said first and second longitudinal reference lines to encompass therebetween a portion of said waveguiding path, and further including a substrate, wherein said thin-film means comprises a thin-film longitudinal ridge of an electro-optic material on said substrate, and wherein said electrode fingers are disposed on said substrate such that the facing ends of said fingers respectively abut the sides of said ridge.
Claim 3
Dependent Claim
17 words
A combination as in claim 1 further including means for applying a voltage to said electrode fingers.
References Cited (Backward Citations)
US3795433A
Cited
US3810688A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-14 | 1978-10-14 | 1979-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-14 | 1982-10-14 | 1983-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-14 | 1986-10-14 | 1987-04-15 | $7700.00 | Window Closed / Lapsed |