Patent US5446750A successfully refreshed from Google Patents.
US5446750A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laser diode pumped solid laser
Assignee: Fujifilm Holdings Corp
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Filing: 1994-10-17
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Granted: 1995-08-29
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Expires: 2014-10-17
Abstract
Abstract A laser diode pumped solid laser comprises an optical module comprising a laser diode, a solid laser crystal, which is excited by a laser beam produced by the laser diode, and a resonator. An electronic cooling device has a cooling surface, on which the optical module is placed, and a heat radiating surface. An inner case housing houses the optical module therein on the cooling surface of the electronic cooling device. An outer case housing houses the inner case housing and the electronic cooling device therein and supports the electronic cooling device via its heat radiating surface. A temperature sensor detects the temperature in the region inside of the inner case housing. A control circuit controls the electronic cooling device in accordance with an output of the temperature sensor and thereby keeps the temperature in the region inside of the inner case housing at a predetermined target value.
Inventors
- 👤 Hisashi Ohtsuka
- 👤 Yoji Okazaki
- 👤 Hiroaki Hyuga
- 👤 Shinji Mitsumoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:35
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/02; H01S3/025; H01S3/04; H01S3/042; H01S3/0401; H01S3/0405; H01S3/09; H01S3/091; H01S3/094; H01S3/0941; H01S3/09415; H01S3/10; H01S3/102; H01S3/1028; H01S3/106; H01S3/108; H01S3/109
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
160 words
A laser diode pumped solid laser comprising: i) an optical module comprising a laser diode, a solid laser crystal, which is excited by a laser beam produced by the laser diode, and a resonator, ii) an electronic cooling device having a cooling surface, on which the optical module is placed, and a heat radiating surface, iii) an inner case housing, which houses the optical module therein on the cooling surface of the electronic cooling device, iv) an outer case housing, which houses the inner case housing and the electronic cooling device therein, and which supports the electronic cooling device via its heat radiating surface, v) a temperature sensor for detecting the temperature in the region inside of the inner case housing, and vi) a control circuit, which controls the electronic cooling device in accordance with an output of the temperature sensor and thereby keeps the temperature in the region inside of the inner case housing at a predetermined target value.
Claim 2
Dependent Claim
160 words
A laser diode pumped solid laser comprising: i) an optical module comprising a laser diode, a solid laser crystal, which is excited by a laser beam produced by the laser diode, and a resonator, ii) an electronic cooling device having a cooling surface, on which the optical module is placed, and a heat radiating surface, iii) an inner case housing, which houses the optical module therein on the cooling surface of the electronic cooling device, iv) an outer case housing, which houses the inner case housing and the electronic cooling device therein, and which supports the electronic cooling device via its heat radiating surface, v) a temperature sensor for detecting the temperature in the region inside of the inner case housing, and vi) a control circuit, which controls the electronic cooling device in accordance with an output of the temperature sensor and thereby keeps the temperature in the region inside of the inner case housing at a predetermined target value.
Claim 3
Dependent Claim
24 words
A laser diode pumped solid laser as defined in claim 1 wherein a rare earth metal has been added to the solid laser crystal.
Claim 4
Dependent Claim
18 words
A laser diode pumped solid laser as defined in claim 2 wherein the rare earth metal is neodymium.
Claim 5
Dependent Claim
50 words
A laser diode pumped solid laser as defined in claim 1 further comprising a crystal of a nonlinear optical material for converting the wavelength of a solid laser beam, which has been produced by the solid laser crystal, the crystal of the nonlinear optical material being located in the resonator.
Claim 6
Dependent Claim
22 words
A laser diode pumped solid laser as defined in claim 4 wherein the solid laser beam is converted into its second harmonic.
References Cited (Backward Citations)
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US5181214A
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US5253102A
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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) | 1998-08-28 | 1999-02-27 | 1999-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-08-28 | 2003-02-27 | 2003-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-08-28 | 2007-02-27 | 2007-08-29 | $7700.00 | Window Closed / Lapsed |