US3992079A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frequency tunable acoustooptic mode filter
Assignee: United States Department of the Navy
•
Filing: 1975-12-11
•
Granted: 1976-11-16
•
Expires: 1995-12-11
Abstract
Abstract A system using collinear acoustooptic interactions in optical waveguides through which waveguide mode conversion is achieved. The system involves a surface acoustic wave interaction with an optically guided wave and its operation for mode conversion.
Inventors
- 👤 Thomas G. Giallorenzi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:52
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/29; G02F1/33; G02F1/335
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
83 words
An optical waveguide structure for co-linear acoustooptic interactions through which guided wave mode conversion and coupling is achieved; which comprises, an optical material substrate, an optical waveguide formed upon said substrate, a mode separating optical waveguide formed on and along a portion of said optical waveguide and, a surface acoustic wave transducer formed on said optical waveguide for producing a surface acoustic wave which travels along the upper surface of said optical waveguide and extends approximately one acoustic wavelength into said optical waveguide.
Claim 2
Dependent Claim
83 words
An optical waveguide structure for co-linear acoustooptic interactions through which guided wave mode conversion and coupling is achieved; which comprises, an optical material substrate, an optical waveguide formed upon said substrate, a mode separating optical waveguide formed on and along a portion of said optical waveguide and, a surface acoustic wave transducer formed on said optical waveguide for producing a surface acoustic wave which travels along the upper surface of said optical waveguide and extends approximately one acoustic wavelength into said optical waveguide.
Claim 3
Dependent Claim
19 words
An optical waveguide structure as claimed in claim 1 wherein, said mode separating optical waveguide is a branching waveguide.
Claim 4
Dependent Claim
18 words
An optical waveguide structure as claimed in claim 2 wherein, said branching waveguide has a large taper slope.
Claim 5
Dependent Claim
27 words
An optical waveguide structure as claimed in claim 1; wherein, said optical waveguide comprises a double material, doubled layered optical waveguide in combination with a branching waveguide.
Claim 6
Dependent Claim
18 words
An optical waveguide structure as claimed in claim 4; wherein, said branching waveguide has a large taper slope.
Claim 7
Dependent Claim
56 words
A mode converting structure as claimed in claim 1; which includes, two parallel waveguides brought into close proximity to each other by means of curved guide sections and modes in these two guides are coupled together by means of overlapping fields and are phase matched by means of an acoustic surface wave produced by said transducer.
References Cited (Backward Citations)
US3920314A
Cited
US3904270A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-11-16 | 1980-05-17 | 1980-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-16 | 1984-05-17 | 1984-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-16 | 1988-05-17 | 1988-11-16 | $7700.00 | Window Closed / Lapsed |