US5088096A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tunable power laser
Assignee: Thales SA
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Filing: 1990-07-03
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Granted: 1992-02-11
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Expires: 2010-07-03
Abstract
Abstract A tunable laser source comprising a laser source emitting a pump beam towards a Raman cell. It transmits a beam at a Stokes wavelength to a non-linear crystal. Depending on the angle of this beam with the optical axis of the crystal, the non-linear crystal transmits two output waves at wavelengths that are different from the Stokes wavelength.
Inventors
- 👤 Jean-Paul Pocholle
- 👤 Michel Papuchon
- 👤 Claude Puech
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:50
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/30; H01S3/305; G; G02; G02F; G02F1/00; G02F1/35; G02F1/39
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
138 words
A power laser source comprising: a first laser cavity defined by a first set of two optically aligned reflection means, said cavity including a pump laser source emitting an optic pump wave at a first predetermined wavelength; a pressurized gas cell containing a gas of a nature such that, receiving the pump wave, the cell emits a Stockes wave at a second wavelength which is different from the first wavelength; a second cavity defined by a second set of two optically aligned reflection means, said second cavity including a non-linear crystal receiving the Stokes wave at a determined angle with respect to the optical axis of the crystal and providing two output waves with wavelengths which are different from the second wavelength wherein the wavelengths of said two output waves depend upon the value of said determined angle.
Claim 2
Dependent Claim
138 words
A power laser source comprising: a first laser cavity defined by a first set of two optically aligned reflection means, said cavity including a pump laser source emitting an optic pump wave at a first predetermined wavelength; a pressurized gas cell containing a gas of a nature such that, receiving the pump wave, the cell emits a Stockes wave at a second wavelength which is different from the first wavelength; a second cavity defined by a second set of two optically aligned reflection means, said second cavity including a non-linear crystal receiving the Stokes wave at a determined angle with respect to the optical axis of the crystal and providing two output waves with wavelengths which are different from the second wavelength wherein the wavelengths of said two output waves depend upon the value of said determined angle.
Claim 3
Dependent Claim
42 words
A power laser source according to claim 1, also comprising a control laser source emitting a control wave with a wavelength that is substantially equal to the second wavelength and transmitted to the pressurized gas cell substantially colinearly with the pump wave.
Claim 4
Dependent Claim
23 words
A power laser source according to claim 1, wherein the pump laser source is a first laser pumped by a first laser diode.
Claim 5
Dependent Claim
23 words
A power laser source according to claim 2, wherein the control laser source is a second laser pumped by a second laser diode.
Claim 6
Dependent Claim
40 words
A power laser source according to claim 1, wherein the determined angle, at which the non-linear crystal receives the Stokes wave, with respect to the optical axis is adjustable, thus enabling the wavelengths of the output waves to be adjusted.
Claim 7
Dependent Claim
20 words
A power laser source according to claim 3, wherein the first laser is a neodymium doped yttrium garnet (Nd:YAG) laser.
Claim 8
Dependent Claim
32 words
A power laser source according to claim 1, wherein the pump laser source and the gas cell are included in an optic cavity demarcated by a first mirror and a second mirror.
Claim 9
Dependent Claim
27 words
A power laser source according to claim 1, wherein the non-linear crystal is included in an optic cavity demarcated by a third mirror and a fourth mirror.
Claim 10
Dependent Claim
39 words
A power laser source according to claim 1, wherein: the pump laser source is an Nd:YAG type laser; the gas cell contains methane (CH 4 ) under pressure; the non-linear crystal is of the chalcopyrite (AgGaSe 2 ) type.
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) | 1995-02-10 | 1995-08-12 | 1996-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-02-10 | 1999-08-12 | 2000-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-02-10 | 2003-08-12 | 2004-02-11 | $7700.00 | Window Closed / Lapsed |