Patent US2193770A successfully refreshed from Google Patents.
US3736045A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fast optical guided wave modulator and digital deflector
Assignee: International Business Machines Corp
•
Filing: 1971-12-27
•
Granted: 1973-05-29
•
Expires: 1991-12-27
Abstract
Abstract An optical guided wave modulator and digital deflector is described having a piezoelectric substrate with an amorphous film waveguide thereon. An interdigital periodic electrode structure is connected to the amorphous film and to a source of d.c. voltage. The voltage produces fringing fields which generate a periodic strain in the piezoelectric substrate. The compressional strain in the piezoelectric substrate extends into the amorphous film to produce a periodic variation of index of refraction which functions as a grating at the Bragg angle which deflects an optical wave traveling in the amorphous film.
Inventors
- 👤 P F Heidrich
- 👤 L Kuhn
- 👤 K S Pennington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:30
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/29; G02F1/295; G02F1/2955; G02F1/01; G02F1/011; G02F1/0128; G02F1/0131; G02F1/0134
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
65 words
A modulator and deflector for optical waves comprising a substrate, an amorphous optical waveguide connected to said substrate, a source of d.c. voltage supply, and a periodic electrode structure connected to said source of d.c. voltage and said waveguide to generate periodic strains in said substrate which are transferred to said waveguide to produce a periodic variation of the index of refractions of said waveguide.
Claim 2
Dependent Claim
65 words
A modulator and deflector for optical waves comprising a substrate, an amorphous optical waveguide connected to said substrate, a source of d.c. voltage supply, and a periodic electrode structure connected to said source of d.c. voltage and said waveguide to generate periodic strains in said substrate which are transferred to said waveguide to produce a periodic variation of the index of refractions of said waveguide.
Claim 3
Dependent Claim
18 words
A modulator and deflector according to claim 1 wherein said substrate is a slab of piezoelectric optical material.
Claim 4
Dependent Claim
26 words
A modulator and deflector according to claim 1 wherein said electrode structure is a spatially periodic interdigital electrode connected to a source of direct current voltage.
Claim 5
Dependent Claim
17 words
A modulator and deflector according to claim 1 wherein said amorphous optical waveguide is composed of glass.
Claim 6
Dependent Claim
92 words
A modulator and deflector for optical waves comprising a substrate composed of a slab of piezoelectric crystal material, an amorphous optical waveguide film connected to the top of said substrate for conducting optical waves, a source of direct current voltage, and a periodic electrode structure connected to said source of direct current voltage and connected to the top of said amorphous waveguide for generating periodic compressional strains in said substrate which generates a spatially periodic variation of the index of refraction of said amorphous waveguide for deflecting optical waves in said waveguide.
Claim 7
Dependent Claim
92 words
A modulator and deflector for optical waves comprising a substrate composed of a slab of piezoelectric crystal material, an amorphous optical waveguide film connected to the top of said substrate for conducting optical waves, a source of direct current voltage, and a periodic electrode structure connected to said source of direct current voltage and connected to the top of said amorphous waveguide for generating periodic compressional strains in said substrate which generates a spatially periodic variation of the index of refraction of said amorphous waveguide for deflecting optical waves in said waveguide.
Claim 8
Dependent Claim
19 words
A modulator and deflector according to claim 5 wherein said electrode structure is a spatially periodic interdigital electrode structure.
References Cited (Backward Citations)
US3655261A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-28 | 1976-11-27 | 1977-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-28 | 1980-11-27 | 1981-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-28 | 1984-11-27 | 1985-05-29 | $7700.00 | Window Closed / Lapsed |