Patent US20030144732A1 successfully refreshed from Google Patents.
US5084881A
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Glass laser
Assignee: Scientific Atlanta LLC
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Filing: 1990-10-11
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Granted: 1992-01-28
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Expires: 2010-10-11
Abstract
Abstract A laser is characterized by a glass gain medium which contains trivalent samarium Sm 3+ ions and which, when optically pumped on one or a number of absorption bands to achieve excitation at or above the metastable 4 G 5/2 level, radiates light at a wavelength substantially corresponding to transitions from the 4 G 5/2 level of samarium.
Inventors
- 👤 Mark C. Farries
- 👤 Paul R. Morkel
- 👤 Janet E. Townsend
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:31
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/14; H01S3/16; H01S3/17; C; C03; C03C; C03C13/00; C03C13/04; C03C13/045; C03C4/00; C03C4/0071; H01S3/05; H01S3/06; H01S3/063; H01S3/067; H01S3/06708; H01S3/06716; H01S3/1601; H01S3/1603; H01S3/1615
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
56 words
A glass laser characterised by a gain medium which contains trivalent samarium Sm 3+ ions, and which when optically pumped on one or a number of absorption bands to achieve excitation to the metastable 4 G 5/2 level, radiates lasing light at a wavelength substantially corresponding to transitions from the 4 G 5/2 level of samarium.
Claim 2
Dependent Claim
56 words
A glass laser characterised by a gain medium which contains trivalent samarium Sm 3+ ions, and which when optically pumped on one or a number of absorption bands to achieve excitation to the metastable 4 G 5/2 level, radiates lasing light at a wavelength substantially corresponding to transitions from the 4 G 5/2 level of samarium.
Claim 3
Dependent Claim
48 words
A laser as claimed in claim 1 wherein the glass gain medium contains more than 80 mol % silica (SiO 2 ) and is an optical fibre waveguide having a core and cladding and containing Sm 3+ ions in at least one of said core and said cladding.
Claim 4
Dependent Claim
24 words
A laser as claimed in claim 2, wherein the optical fibre waveguide is a single-mode design which lases at a wavelength of 651 nm.
Claim 5
Dependent Claim
39 words
A laser according to claim 2 in which the glass gain medium is doped with Sm 3+ ions using the solution doping technique and is adapted to be optically pumped with light having a wavelength of about 488 nm.
Claim 6
Dependent Claim
20 words
A laser according to claim 2, wherein said laser emits visible radiation having a line width of about 3.3 nm.
Claim 7
Dependent Claim
97 words
A glass laser, comprising: a gain medium formed from a glass optical fiber waveguide having an interior core and exterior cladding, having trivalent samarium Sm 3+ ions solution doped into at least one of said core and cladding, having a core which contains more than 80 mol % silica (SiO 2 ), and having at least one absorption band which when optically pumped achieves excitation to the metastable 4 G 5/2 level and radiates lasing light at a wavelength substantially corresponding to transitions from the 4 G 5/2 level to the 6 H 9/2 level of samarium.
Claim 8
Dependent Claim
97 words
A glass laser, comprising: a gain medium formed from a glass optical fiber waveguide having an interior core and exterior cladding, having trivalent samarium Sm 3+ ions solution doped into at least one of said core and cladding, having a core which contains more than 80 mol % silica (SiO 2 ), and having at least one absorption band which when optically pumped achieves excitation to the metastable 4 G 5/2 level and radiates lasing light at a wavelength substantially corresponding to transitions from the 4 G 5/2 level to the 6 H 9/2 level of samarium.
Claim 9
Dependent Claim
26 words
The glass laser of claim 6, wherein said glass optical fiber waveguide is a single-mode optical fiber which lases at a wavelength of about 651 nm.
Claim 10
Dependent Claim
67 words
The glass laser of claim 6, further including means for optically pumping said glass fiber at about 480 nm; and means for forming a Fabry-Perot resonator from two opposite dielectric mirrors whose reflectances at a wavelength of about 650 nm are in excess of 60% and whose reflectances at about 488 nm are less than about 10%, said fiber being cleaved and butted up to said mirrors.
Claim 11
Dependent Claim
102 words
A glass laser, comprising: a gain medium formed from a single-mode optical fiber having a glass core which contains at least 80 mol % silica and which is doped with trivalent samarium Sm 3+ ions using the solution doping technique and which has at least one absorption band to achieve excitation to the metastable 4 G 5/2 level, said fiber when optically pumped to said 4 G 5/2 level radiating light having a wavelength substantially corresponding to transitions from the 4 G 5/2 level to the 6 H 5/2 level of samarium, and having a line where width of about 3.3 nm.
Claim 12
Dependent Claim
102 words
A glass laser, comprising: a gain medium formed from a single-mode optical fiber having a glass core which contains at least 80 mol % silica and which is doped with trivalent samarium Sm 3+ ions using the solution doping technique and which has at least one absorption band to achieve excitation to the metastable 4 G 5/2 level, said fiber when optically pumped to said 4 G 5/2 level radiating light having a wavelength substantially corresponding to transitions from the 4 G 5/2 level to the 6 H 5/2 level of samarium, and having a line where width of about 3.3 nm.
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) | 1995-01-27 | 1995-07-29 | 1996-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-01-27 | 1999-07-29 | 2000-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-01-27 | 2003-07-29 | 2004-01-28 | $7700.00 | Window Closed / Lapsed |