US3757247A
Expired / Lapsed
US
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Frequency selective optical isolator
Assignee: United States Department of the Navy
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Filing: 1972-06-22
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Granted: 1973-09-04
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Expires: 1992-06-22
Abstract
Abstract A traveling wave optical oscillator (LASER) in a ring cavity. The system provides loss or gain in the cavity field in order to provide loss or gain in one direction in a two direction system.
Inventors
- 👤 T Giallorenzi
- 👤 M Reilly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:42
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/05; H01S3/08; H01S3/081; H01S3/083; H01S3/10; H01S3/106; H01S3/108; H01S3/1083
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
62 words
A frequency selective optical isolator; which comprises, first, second and third mirrors, spaced from each other and positioned to form a triangular optical path, a radiation gain medium positioned in the optical cavity, a nonlinear crystal positioned in said optical cavity, one of said mirrors having a reflective coating for the desired oscillator radiation and being transparent at the desired input frequency.
Claim 2
Dependent Claim
62 words
A frequency selective optical isolator; which comprises, first, second and third mirrors, spaced from each other and positioned to form a triangular optical path, a radiation gain medium positioned in the optical cavity, a nonlinear crystal positioned in said optical cavity, one of said mirrors having a reflective coating for the desired oscillator radiation and being transparent at the desired input frequency.
Claim 3
Dependent Claim
26 words
A frequency selective optical isolator as claimed in claim 1; in which, said nonlinear crystal is selected from a group consisting of LiNbO3, ADP, and KDP.
Claim 4
Independent Claim
65 words
A method of limiting oscillation to one direction of propagation only in a ring cavity which has traveling waves set up which travel in both directions in the optical path, which comprises, providing selectively gain to the wave traveling in the desired directioN by the parametric process, and providing selectively loss to the wave traveling in the undesired direction of travel by the up-conversion process.
Claim 5
Independent Claim
65 words
A method of limiting oscillation to one direction of propagation only in a ring cavity which has traveling waves set up which travel in both directions in the optical path, which comprises, providing selectively gain to the wave traveling in the desired directioN by the parametric process, and providing selectively loss to the wave traveling in the undesired direction of travel by the up-conversion process.
Claim 6
Dependent Claim
16 words
A method as claimed in claim 3; in which, the parametric process is the down-conversion process.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |