US5067134A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for generating blue laser light
Assignee: US Philips Corp
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Filing: 1991-03-08
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Granted: 1991-11-19
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Expires: 2011-03-08
Abstract
Abstract A device and a method of generating blue laser light having a wavelength of approximately 450 nm by means of an upconversion process, said device comprising a single semiconductor laser which emits light having a wavelength of 640 to 700 nm, and a resonator cavity which comprises a glass composition of heavy metal fluorides, which glass composition contains trivalent thulium ions. The resonator cavity preferably consists of a glass fibre having a core of a glass composition which consists of heavy-metal fluorides containing 0.01 to 1 mol% of thulium fluoride and a cladding with a lower refractive index than the core. The device suitable for generating continuous blue laser light.
Inventors
- 👤 Emmanuel W. J. L. Oomen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:55
CPC Classifications
H; H01; H01S; H01S5/00; H01S5/02; H01S5/026; H01S3/00; H01S3/05; H01S3/06; H01S3/063; H01S3/067; H01S3/14; H01S3/16; H01S3/17; H01S5/10; H01S5/12; H01S5/20; H01S5/24; H01S3/09; H01S3/091; H01S3/094; H01S3/094003; H01S3/094092; H01S3/1601; H01S3/1603; H01S3/1616; H01S3/173
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
76 words
A device for generating blue laser light having a wavelength of 445 to 455 nm by means of an upconversion process, said device including a pumping laser and a resonator cavity comprising a fluoride-containing material having trivalent thulium ions, characterized in that the fluoride-containing material is a glass composition of heavy-metal fluorides and in that a single semiconductor laser is used as the pumping laser which emits light having a wavelength of 640 to 700 nm.
Claim 2
Independent Claim
76 words
A device for generating blue laser light having a wavelength of 445 to 455 nm by means of an upconversion process, said device including a pumping laser and a resonator cavity comprising a fluoride-containing material having trivalent thulium ions, characterized in that the fluoride-containing material is a glass composition of heavy-metal fluorides and in that a single semiconductor laser is used as the pumping laser which emits light having a wavelength of 640 to 700 nm.
Claim 3
Dependent Claim
24 words
A device as claimed in claim 1, characterized in that the pumping laser used emits light having a wavelength of 650 to 665 nm.
Claim 4
Dependent Claim
39 words
A device as claimed in claim 1, characterized in that the resonator cavity comprises a glass fibre having a core of a glass composition consisting of heavy-metal fluorides and a cladding with a lower refractive index than the core.
Claim 5
Dependent Claim
25 words
A device as claimed in claim 1, characterized in that the glass composition contains 0.01 to 1 mol % of thulium fluoride TmF 3 .
Claim 6
Dependent Claim
34 words
A device as claimed in claim 1, characterized in that the glass composition additionally contains terbium fluoride TbF 3 and/or praseodymium fluoride PrF 3 in an overall quantity of 0.01 to 1 mol %.
Claim 7
Independent Claim
84 words
A method of generating blue laser light by means of an upconversion process, in which a pumping laser and a resonator cavity are used, which resonator cavity comprises a fluoride-containing material having trivalent thulium ions, characterized in that a glass composition of heavy metal fluorides is selected as the fluoride containing material, and in that a single semiconductor laser is used to irradiate light having a wavelength of 640 to 700 nm, thereby obtaining laser light having a wavelength of 445 to 455 nm.
Claim 8
Independent Claim
84 words
A method of generating blue laser light by means of an upconversion process, in which a pumping laser and a resonator cavity are used, which resonator cavity comprises a fluoride-containing material having trivalent thulium ions, characterized in that a glass composition of heavy metal fluorides is selected as the fluoride containing material, and in that a single semiconductor laser is used to irradiate light having a wavelength of 640 to 700 nm, thereby obtaining laser light having a wavelength of 445 to 455 nm.
Claim 9
Dependent Claim
36 words
A method as claimed in claim 6, characterized in that by means of the pumping laser light having a wavelength of 650 to 665 nm is irradiated, and in that the laser light obtained is continuous.
References Cited (Backward Citations)
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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) | 1994-11-18 | 1995-05-20 | 1995-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-11-18 | 1999-05-20 | 1999-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-11-18 | 2003-05-20 | 2003-11-19 | $7700.00 | Window Closed / Lapsed |