Patent US5689519A successfully refreshed from Google Patents.
US5689519A
Expired / Lapsed
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Environmentally stable passively modelocked fiber laser pulse source
Assignee: IMRA America Inc
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Filing: 1993-12-20
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Granted: 1997-11-18
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Expires: 2013-12-20
Abstract
Abstract The present invention is directed to providing an environmentally stable, ultra-short pulse source. Exemplary embodiments relate to passively modelocked ultra-short fiber lasers which are insensitive to temperature variations and which possess only negligible sensitivity to pressure variations. Further, exemplary embodiments can be implemented in a cost-effective manner which render them commercially practical in unlimited applications. Arbitrary fiber lengths (e.g., on the order of 1 millimeter to 1 kilometer, or greater) can be used to provide an ultra-short pulse with a cost-effective architecture which is commercially practical.
Inventors
- 👤 Martin E. Fermann
- 👤 Donald J. Harter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:09
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/05; H01S3/06; H01S3/063; H01S3/067; H01S3/08; H01S3/08059; H01S3/10; H01S3/11; H01S3/1106; H01S3/1112; H01S3/1115; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
84 words
A passively modelocked laser comprising: means for generating laser energy, said laser energy generating means having a cavity which includes: a gain medium for amplifying energy in the cavity; means for reflecting energy along an axis which passes through the gain medium; means for compensating linear phase drifts of the gain medium; means for outputting laser energy generated within said cavity; a doped highly-birefringent fiber; and low-birefringent fiber operably connected with said highly-birefringent fiber for transmitting laser energy along said axis of the cavity.
Claim 2
Dependent Claim
84 words
A passively modelocked laser comprising: means for generating laser energy, said laser energy generating means having a cavity which includes: a gain medium for amplifying energy in the cavity; means for reflecting energy along an axis which passes through the gain medium; means for compensating linear phase drifts of the gain medium; means for outputting laser energy generated within said cavity; a doped highly-birefringent fiber; and low-birefringent fiber operably connected with said highly-birefringent fiber for transmitting laser energy along said axis of the cavity.
Claim 3
Dependent Claim
15 words
A passively modelocked laser according to claim 1, wherein said gain medium includes highly-birefringent fiber.
Claim 4
Dependent Claim
79 words
A passively modelocked laser comprising: means for generating laser energy, said laser energy generating means having a cavity which includes: a gain medium for amplifying energy in the cavity; means for reflecting energy along an axis which passes through the gain medium; means for compensating linear phase drifts of the gain medium; means for outputting laser energy generated within said cavity; and a polarization beam splitter and a fiber isolator for output coupling of laser light from the cavity.
Claim 5
Dependent Claim
79 words
A passively modelocked laser comprising: means for generating laser energy, said laser energy generating means having a cavity which includes: a gain medium for amplifying energy in the cavity; means for reflecting energy along an axis which passes through the gain medium; means for compensating linear phase drifts of the gain medium; means for outputting laser energy generated within said cavity; and a polarization beam splitter and a fiber isolator for output coupling of laser light from the cavity.
Claim 6
Dependent Claim
71 words
A passively modelocked laser comprising: means for generating laser energy, said laser energy generating means having a cavity which includes: a gain medium for amplifying energy in the cavity; means for reflecting energy along an axis which passes through the gain medium; means for compensating linear phase drifts of the gain medium; means for outputting laser energy generated within said cavity; and a fiber stretcher for initiating modelocking of the laser.
Claim 7
Dependent Claim
71 words
A passively modelocked laser comprising: means for generating laser energy, said laser energy generating means having a cavity which includes: a gain medium for amplifying energy in the cavity; means for reflecting energy along an axis which passes through the gain medium; means for compensating linear phase drifts of the gain medium; means for outputting laser energy generated within said cavity; and a fiber stretcher for initiating modelocking of the laser.
Claim 8
Dependent Claim
46 words
A passively modelocked laser comprising: means for generating laser energy, said laser energy generating means having a cavity which further includes: a low-birefringent fiber; and a doped highly-birefringent fiber connected to said low-birefringent fiber along an axis through which laser energy is transmitted within the cavity.
Claim 9
Dependent Claim
46 words
A passively modelocked laser comprising: means for generating laser energy, said laser energy generating means having a cavity which further includes: a low-birefringent fiber; and a doped highly-birefringent fiber connected to said low-birefringent fiber along an axis through which laser energy is transmitted within the cavity.
Claim 10
Dependent Claim
22 words
A passively modelocked laser according to claim 5, wherein said laser energy generating means is a fiber laser for producing ultra-short pulses.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-11-17 | 2001-05-19 | 2001-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-11-17 | 2005-05-19 | 2005-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-11-17 | 2009-05-19 | 2009-11-18 | $7700.00 | Window Closed / Lapsed |