Patent US5253322A successfully refreshed from Google Patents.
US5253322A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical functioning glass and fiber amplifier
Assignee: Sumitomo Electric Industries Ltd
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Filing: 1991-06-20
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Granted: 1993-10-12
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Expires: 2011-06-20
Abstract
Abstract The present invention relates to an optical functioning glass containing Nd +3 as an active ion which amplifies an input light, and at least one other optical active ion different from Nd +3 which absorbs light at and near 1 μm. The present invention also relates to an optical functioning glass containing Nd +3 as an active ion which amplifies the input light, and at least one other optical active ion different from Nd +3 functioning as a promoter. An efficiency of the stimulated emission of Nd 3+ caused by signal light propagated through the optical functioning glass is enhanced and a gain of the light amplification at 1.3 μm is increased.
Inventors
- 👤 Masashi Onishi
- 👤 Yoshiki Chigusa
- 👤 Koji Nakazato
- 👤 Minoru Watanabe
- 👤 Yoshiaki Miyajima
- 👤 Tomoki Sugawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:48
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/05; H01S3/06; H01S3/063; H01S3/0632; H01S3/067; H01S3/06708; H01S3/14; H01S3/16; H01S3/17; H01S2302/00; H01S2303/00; H01S3/1601; H01S3/1603; H01S3/1611; H01S3/1691; H01S3/1698
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
60 words
An optical functioning single glass doped with Nd +3 as an active ion and codoped with at least one rare earth ion selected from the group consisting of Pr 3+ , Yb 3+ , Sm 3+ and Ho 3+ , said at least one codoped rare earth ion functioning as an absorbent for light at and near 1 μm band.
Claim 2
Dependent Claim
60 words
An optical functioning single glass doped with Nd +3 as an active ion and codoped with at least one rare earth ion selected from the group consisting of Pr 3+ , Yb 3+ , Sm 3+ and Ho 3+ , said at least one codoped rare earth ion functioning as an absorbent for light at and near 1 μm band.
Claim 3
Dependent Claim
21 words
An optical functioning glass according to claim 1 wherein a concentration of said rare earth ion is between 50% and 150%.
Claim 4
Dependent Claim
16 words
An optical fiber comprising: a core made of the optical functioning glass according to claim 1.
Claim 5
Dependent Claim
49 words
An optically active device comprising: an optical fiber according to claim 3 for propagating light at and near 1.3 μm band, an light source for generating an excitation light at 0.8 μm band, and optical means for directing the excitation light from said light source to said optical fiber.
Claim 6
Dependent Claim
26 words
A fiber amplifier comprising: an optically active device according to claim 4, coupling means for coupling signal light at 1.3 μm band into said optical fiber.
Claim 7
Dependent Claim
32 words
A fiber laser comprising: an optically active device according to claim 4, resonator means for feeding light at and near 1.3 μm band from said optical fiber back to said optical fiber.
Claim 8
Dependent Claim
17 words
A waveguide device comprising: a planar waveguide made of the optical functioning glass according to claim 1.
Claim 9
Dependent Claim
49 words
An optically active device comprising: a waveguide device according to claim 7 for propagating light at and near 1.3 μm band, an light source for generating an excitation light at 0.8 μm band, and optical means for directing the excitation light from said light source to said waveguide device.
Claim 10
Dependent Claim
32 words
A waveguide laser comprising: an optically active device according to claim 8, resonator means for feeding light at and near 1.3 μm band from said waveguide device back to said waveguide device.
Claim 11
Dependent Claim
26 words
A waveguide amplifier comprising: an optically active device according to claim 8, coupling means for coupling signal light at 1.3 μm band into said waveguide device.
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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) | 1996-10-11 | 1997-04-12 | 1997-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-10-11 | 2001-04-12 | 2001-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-10-11 | 2005-04-12 | 2005-10-12 | $7700.00 | Window Closed / Lapsed |