US5134620A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laser with longitudinal mode selection
Assignee: Ciena Corp
•
Filing: 1990-11-20
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Granted: 1992-07-28
•
Expires: 2010-11-20
Abstract
Abstract A laser is fabricated from an optical transmission medium having a laser cavity with an rare earth (e.g. Erbium) doped portion. At least one longitudinal mode is suppressed using a plurality of series coupled Fabry-Perot cavities, an optical grating, or a combination thereof. Ring lasers and linear structures are disclosed.
Inventors
- 👤 David R. Huber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:36
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/05; H01S3/08; H01S3/08018; H01S3/08022; H01S3/08031; H01S3/08036; H01S3/06; H01S3/063; H01S3/067; H01S3/081; H01S3/083; H01S3/0675; H01S3/06791; H01S3/14; H01S3/16; H01S3/1601; H01S3/1603; H01S3/1608
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
55 words
A laser for providing an optical carrier comprising: a laser cavity formed in a guided wave configuration from an optical material doped at least in part with a rare earth element; and means including an optical grating and a separate reflector at opposite ends of said laser cavity for suppressing at least one mode thereof.
Claim 2
Dependent Claim
55 words
A laser for providing an optical carrier comprising: a laser cavity formed in a guided wave configuration from an optical material doped at least in part with a rare earth element; and means including an optical grating and a separate reflector at opposite ends of said laser cavity for suppressing at least one mode thereof.
Claim 3
Dependent Claim
19 words
A laser in accordance with claim 1 wherein said grating is in the doped portion of said optical material.
Claim 4
Dependent Claim
18 words
A laser in accordance with claim 1 wherein said grating is outside the doped portion of said cavity.
Claim 5
Dependent Claim
15 words
A laser in accordance with claim 1 wherein: said laser cavity has a ring configuration.
Claim 6
Dependent Claim
18 words
A laser in accordance with claim 4 wherein said grating is within the doped portion of said ring.
Claim 7
Dependent Claim
18 words
A laser in accordance with claim 4 wherein said grating is outside the doped portion of said ring.
Claim 8
Dependent Claim
15 words
A laser in accordance with claim 4 further comprising: an optical isolator within said ring.
Claim 9
Dependent Claim
19 words
A laser in accordance with claim 1 further comprising: an optical isolator coupled in series with said laser cavity.
Claim 10
Dependent Claim
15 words
A laser in accordance with claim 1 wherein said laser cavity is an optical fiber.
Claim 11
Dependent Claim
15 words
A laser in accordance with claim 1 wherein said laser cavity is a silica waveguide.
Claim 12
Dependent Claim
14 words
A laser in accordance with claim 1 wherein said rare earth element is Erbium.
Claim 13
Dependent Claim
14 words
A laser in accordance with claim 1 wherein said rare earth element is Neodymium.
Claim 14
Dependent Claim
56 words
A laser for providing an optical carrier comprising: a laser cavity formed in a guided wave configuration from an optical material doped at least in part with a rare-earth element; and means including a plurality of series coupled Fabry-Perot cavities operatively associated with said laser cavity for suppressing at least one mode of said laser cavity.
Claim 15
Dependent Claim
56 words
A laser for providing an optical carrier comprising: a laser cavity formed in a guided wave configuration from an optical material doped at least in part with a rare-earth element; and means including a plurality of series coupled Fabry-Perot cavities operatively associated with said laser cavity for suppressing at least one mode of said laser cavity.
Claim 16
Dependent Claim
15 words
A laser in accordance with claim 13 wherein: said Fabry-Perot cavities area of unequal length.
Claim 17
Dependent Claim
17 words
A laser in accordance with claim 14 wherein: one of said Fabry-Perot cavities is said laser cavity.
Claim 18
Dependent Claim
25 words
A laser in accordance with claim 14 wherein the lengths of said Fabry-Perot cavities provide suppression of all but one mode of said laser cavity.
Claim 19
Dependent Claim
17 words
A laser in accordance with claim 13 further comprising: an optical isolator coupled to said laser cavity.
Claim 20
Dependent Claim
16 words
A laser in accordance with claim 13 further comprising: an optical grating within said laser cavity.
Claim 21
Dependent Claim
17 words
A laser in accordance with claim 18 further comprising: an optical isolator coupled to said laser cavity.
Claim 22
Dependent Claim
23 words
A laser in accordance with claim 13 wherein said laser cavity has a ring configuration and said Fabry-Perot cavities are within said ring.
Claim 23
Dependent Claim
19 words
A laser in accordance with claim 20 further comprising: an optical isolator coupled in series with said laser cavity.
Claim 24
Dependent Claim
72 words
A laser for providing an optical carrier comprising: a laser cavity formed from an optical material doped at least in part with a rare-earth element; and an external grating coupled to a first end of said laser cavity a distance L from a reflector coupled to a second end of said cavity, wherein the dimensions of said grating and said distance L cooperate to suppress at least one mode of said laser.
Claim 25
Dependent Claim
72 words
A laser for providing an optical carrier comprising: a laser cavity formed from an optical material doped at least in part with a rare-earth element; and an external grating coupled to a first end of said laser cavity a distance L from a reflector coupled to a second end of said cavity, wherein the dimensions of said grating and said distance L cooperate to suppress at least one mode of said laser.
References Cited (Backward Citations)
US3958188A
Cited
US4530097A
Cited
US4564949A
Cited
US4734912A
Cited
US4794615A
Cited
US4901322A
Cited
US4963832A
Cited
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1995-07-28 | 1996-01-27 | 1996-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-07-28 | 2000-01-27 | 2000-07-28 | $3760.00 | Window Closed / Lapsed |
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