USH822H
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of amplitude modulating a laser beam
Assignee: United States Department of the Army
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Filing: 1989-04-28
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Granted: 1990-09-04
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Expires: 2009-04-28
Abstract
Abstract An acousto-optic tunable filter (AOTF), instead of being used for its intended use of frequency or wavelength tuning a laser from within its resonant cavity, is used outside the laser cavity to amplitude modulate the output beam of the laser. This is accomplished by directing the laser output beam into the AOTF and applying an A.C. voltage to a piezo-electric transducer which is a part of the AOTF.
Inventors
- 👤 John E. Nettleton
- 👤 Dallas N. Barr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:50
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/11
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
A method of amplitude modulating a laser beam, including the steps of: directing said laser beam into a colinear acousto-optic tunable filter including an anisotropic medium with a piezo-electric transducer affixed thereto; and applying an A.C. voltage to said transducer, whereby said laser is amplitude modulated to produce a modulation envelope in accordance with said A.C. voltage.
Claim 2
Independent Claim
57 words
A method of amplitude modulating a laser beam, including the steps of: directing said laser beam into a colinear acousto-optic tunable filter including an anisotropic medium with a piezo-electric transducer affixed thereto; and applying an A.C. voltage to said transducer, whereby said laser is amplitude modulated to produce a modulation envelope in accordance with said A.C. voltage.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-09-03 | 1994-03-05 | 1994-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-09-03 | 1998-03-05 | 1998-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-09-03 | 2002-03-05 | 2002-09-04 | $7700.00 | Window Closed / Lapsed |