Patent US5708672A successfully refreshed from Google Patents.
US5708672A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual wavelength solid state laser
Assignee: CVI Laser LLC
•
Filing: 1996-01-29
•
Granted: 1998-01-13
•
Expires: 2016-01-29
Abstract
Abstract A dual wavelength continuous wave (cw) solid state microlaser device that provides simultaneous laser action at a first and a second wavelength. The laser comprises a solid state gain material including a rare earth element having a first gain transition at the first wavelength and a second gain transition at the second wavelength. The gain material defines a block having a first face and a second, opposite face. A first reflective surface that is substantially reflective at both the first and second wavelengths is closely coupled to the first face. An output coupler provides a second reflective surface that is partially reflective at both the first and the second wavelengths, which is oriented with respect to the first reflective face to define an optical cavity through the first and second faces of the solid state gain material. An optical pump source is provided to end pump the solid state gain material with continuous pump radiation at a pump wavelength that is highly absorptive by the gain material. In some embodiments, the first reflective surface may be formed directly on the first face of the solid state gain material, and the second reflective surface may be formed directly on the second face of the solid state gain material. The resultant laser beam comprises two wavelengths each of which is believed to have a single longitudinal mode. In some embodiments the solid state gain material comprises a uniaxial crystal oriented within the optical cavity to provide polarized emissions for the first and second wavelengths.
Inventors
- 👤 Maurice A. Pessot
- 👤 David E. Hargis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:25
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/05; H01S3/06; H01S3/0627; H01S3/0602; H01S3/0604; H01S3/08; H01S3/08086; H01S3/0809; H01S3/09; H01S3/091; H01S3/094; H01S3/094049; H01S3/094053; H01S3/0941; H01S3/09415; H01S3/14; H01S3/16; H01S3/1601; H01S3/1603; H01S3/1611; H01S3/163; H01S3/1671; H01S3/1673
Claims Analysis
Total Claims: 41
Claim 1
Independent Claim
124 words
A dual wavelength continuous wave (cw) solid state laser device comprising: a solid state gain material having a first gain transition at a first wavelength and a second gain transition at a second wavelength, said gain material defining a block having a first face and a second, opposite face; a first reflective surface closely coupled to said first face, said first reflective surface being substantially reflective at both said first and said second wavelengths; and an output coupler including a second reflective surface that is partially reflective at both said first and said second wavelengths, said second reflective face oriented with respect to said first reflective face to define an optical cavity through said first and second faces of said solid state gain material.
Claim 2
Dependent Claim
124 words
A dual wavelength continuous wave (cw) solid state laser device comprising: a solid state gain material having a first gain transition at a first wavelength and a second gain transition at a second wavelength, said gain material defining a block having a first face and a second, opposite face; a first reflective surface closely coupled to said first face, said first reflective surface being substantially reflective at both said first and said second wavelengths; and an output coupler including a second reflective surface that is partially reflective at both said first and said second wavelengths, said second reflective face oriented with respect to said first reflective face to define an optical cavity through said first and second faces of said solid state gain material.
Claim 3
Dependent Claim
45 words
The solid state laser device of claim 1, and further comprising an optical pump source optically coupled through said first reflective face to end-pump said solid state gain material with continuous pump radiation at a pump wavelength that is highly absorptive by said gain material.
Claim 4
Dependent Claim
37 words
The solid state laser device of claim 2, wherein said first face of said solid state gain material is highly transmissive to said pump radiation and wherein said first reflective surface is formed on said first face.
Claim 5
Dependent Claim
52 words
The solid state laser device of claim 2, and further comprising an optical fiber having a first end coupled to said optical pump source and a second end coupled to said first reflective surface, so that said pump radiation is supplied through said optical fiber to pump said solid state gain material.
Claim 6
Dependent Claim
23 words
The solid state laser device of claim 1, wherein said first reflective surface is formed on said first face of said gain material.
Claim 7
Dependent Claim
23 words
The solid state laser device of claim 5, wherein said second reflective surface is formed on said second face of said gain material.
Claim 8
Dependent Claim
23 words
The solid state laser device of claim 1, wherein said second reflective surface is formed on said second face of said gain material.
Claim 9
Dependent Claim
19 words
The solid state laser device of claim 1, wherein said solid state gain material comprises a rare earth element.
Claim 10
Dependent Claim
15 words
The solid state laser device of claim 8, wherein said rare earth element comprises neodymium.
Claim 11
Dependent Claim
18 words
The solid state laser device of claim 8, wherein said solid state gain material comprises Nd:YVO 4 .
Claim 12
Dependent Claim
38 words
The solid state laser device of claim 1, wherein said solid state gain material comprises a uniaxial crystal oriented within said optical cavity to provide said first and second lasing polarizations for said first and said second wavelengths.
Claim 13
Dependent Claim
18 words
The solid state device of claim 11, wherein said uniaxial crystal is doped with a rare earth element.
Claim 14
Dependent Claim
15 words
The solid state laser device of claim 12, wherein said rare earth element comprises neodymium.
Claim 15
Dependent Claim
16 words
The solid state laser device of claim 12, wherein said uniaxial crystal comprises Nd:YVO 4 .
Claim 16
Dependent Claim
121 words
A dual wavelength continuous wave (cw) solid state laser device comprising: a solid state gain material having a first gain transition at a first wavelength and a second gain transition at a second wavelength, said gain material defining a block having a first face and a second, opposite face, said first face having a reflective surface formed thereon that is substantially reflective at both said first and said second wavelengths; and an output coupler including a second reflective surface that is partially reflective at both said first and said second wavelengths, said second reflective face being oriented with respect to said first reflective face to define an optical cavity through said first and second faces of said solid state gain material.
Claim 17
Dependent Claim
121 words
A dual wavelength continuous wave (cw) solid state laser device comprising: a solid state gain material having a first gain transition at a first wavelength and a second gain transition at a second wavelength, said gain material defining a block having a first face and a second, opposite face, said first face having a reflective surface formed thereon that is substantially reflective at both said first and said second wavelengths; and an output coupler including a second reflective surface that is partially reflective at both said first and said second wavelengths, said second reflective face being oriented with respect to said first reflective face to define an optical cavity through said first and second faces of said solid state gain material.
Claim 18
Dependent Claim
22 words
The solid state laser device of claim 15, wherein said output coupler is formed on said second face of said gain material.
Claim 19
Dependent Claim
57 words
The solid state laser device of claim 15, and further comprising an optical pump source optically coupled through said first reflective face to end-pump said solid state gain material with continuous pump radiation at a pump wavelength that is highly absorptive by said gain material, and wherein said first face is highly transmissive to said pump radiation.
Claim 20
Dependent Claim
55 words
The solid state laser device of claim 17, and further comprising an optical fiber having a first end coupled to said optical pump source and a second end coupled to said first face of said gain material, so that said pump radiation is supplied through said optical fiber to pump said solid state gain material.
Claim 21
Dependent Claim
19 words
The solid state laser device of claim 15, wherein said solid state gain material comprises a rare earth element.
Claim 22
Dependent Claim
15 words
The solid state laser device of claim 19, wherein said rare earth element comprises neodymium.
Claim 23
Dependent Claim
18 words
The solid state laser device of claim 19, wherein said solid state gain material comprises Nd:YVO 4 .
Claim 24
Dependent Claim
38 words
The solid state laser device of claim 19, wherein said solid state gain material comprises a uniaxial crystal oriented within said optical cavity to provide said first and second lasing polarizations for said first and said second wavelengths.
Claim 25
Dependent Claim
18 words
The solid state device of claim 22, wherein said uniaxial crystal is doped with a rare earth element.
Claim 26
Dependent Claim
15 words
The solid state laser device of claim 22, wherein said rare earth element comprises neodymium.
Claim 27
Dependent Claim
16 words
The solid state laser device of claim 23, wherein said uniaxial crystal comprises Nd:YVO 4 .
Claim 28
Dependent Claim
158 words
A dual wavelength continuous wave (cw) solid state laser device comprising: a solid state gain material comprising a rare earth element having a first gain transition at a first wavelength and a second gain transition at a second wavelength, said gain material defining a block having a first face and a second, opposite face, said first face having a reflective surface formed thereon that is substantially reflective at both said first and said second wavelengths; an optical pump source optically coupled through said first face to end-pump said solid state gain material with continuous pump radiation at a pump wavelength that is highly absorptive by said gain material; and an output coupler including a second reflective surface that is partially reflective at both said first and said second wavelengths, said second reflective face oriented with respect to said first reflective face to define an optical cavity through said first and second faces of said solid state gain material.
Claim 29
Dependent Claim
158 words
A dual wavelength continuous wave (cw) solid state laser device comprising: a solid state gain material comprising a rare earth element having a first gain transition at a first wavelength and a second gain transition at a second wavelength, said gain material defining a block having a first face and a second, opposite face, said first face having a reflective surface formed thereon that is substantially reflective at both said first and said second wavelengths; an optical pump source optically coupled through said first face to end-pump said solid state gain material with continuous pump radiation at a pump wavelength that is highly absorptive by said gain material; and an output coupler including a second reflective surface that is partially reflective at both said first and said second wavelengths, said second reflective face oriented with respect to said first reflective face to define an optical cavity through said first and second faces of said solid state gain material.
Claim 30
Dependent Claim
22 words
The solid state laser device of claim 26, wherein said output coupler is formed on said second face of said gain material.
Claim 31
Dependent Claim
55 words
The solid state laser device of claim 26, and further comprising an optical fiber having a first end coupled to said optical pump source and a second end coupled to said first face of said gain material, so that said pump radiation is supplied through said optical fiber to pump said solid state gain material.
Claim 32
Dependent Claim
18 words
The solid state laser device of claim 26, wherein said solid state gain material comprises Nd:YVO 4 .
Claim 33
Dependent Claim
24 words
The solid state laser device of claim 29, wherein said first wavelength is approximately 1064 nm and said second wavelength is approximately 1342 nm.
Claim 34
Independent Claim
75 words
A method of generating continuous wave (cw) laser radiation in a cavity including a block of solid state laser material comprising the steps of: a) continuously end-pumping the block of solid state laser material with pump radiation; b) within said cavity, simultaneously generating substantial first cw laser radiation at a first wavelength and substantial second cw laser radiation at a second wavelength; and c) outputting said first and second cw laser radiation from said cavity.
Claim 35
Independent Claim
75 words
A method of generating continuous wave (cw) laser radiation in a cavity including a block of solid state laser material comprising the steps of: a) continuously end-pumping the block of solid state laser material with pump radiation; b) within said cavity, simultaneously generating substantial first cw laser radiation at a first wavelength and substantial second cw laser radiation at a second wavelength; and c) outputting said first and second cw laser radiation from said cavity.
Claim 36
Dependent Claim
40 words
The method of claim 31, and further comprising the step of absorbing said pump radiation within a short absorption distance into said solid state laser material so that said first and said second laser radiations have a single longitudinal mode.
Claim 37
Dependent Claim
31 words
The method of claim 31, wherein said first cw laser radiation is generated at a first polarization and said second cw laser radiation is generated at a second, approximately parallel polarization.
Claim 38
Dependent Claim
31 words
The method of claim 31, wherein said first cw laser radiation is generated at a first polarization and said second cw laser radiation is generated at a second, approximately perpendicular polarization.
Claim 39
Dependent Claim
39 words
The method of claim 31, wherein said step b includes generating said first cw laser radiation using a first transition of a neodymium ion and generating said second cw laser radiation using a second transition of a neodymium ion.
Claim 40
Dependent Claim
32 words
The method of claim 35, wherein said first transition comprises the 4 F 3/2 to 4 I 11/2 transition and the second transition comprises the 4 F 3/2 4 I 13/2 transition.
Claim 41
Dependent Claim
32 words
The method of claim 35, wherein said gain material comprises Nd:YVO 4 and said first transition is centered at approximately 1064 nm and said second transition is centered at approximately 1342 nm.
References Cited (Backward Citations)
US4739507A
Cited
US4731787A
Cited
US4879723A
Cited
US5365539A
Cited
US4860304A
Cited
US4933947A
Cited
US4847851A
Cited
US4942582A
Cited
US4956843A
Cited
US5142542A
Cited
US5369661A
Cited
JPH05341393A
Cited
US5313477A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-01-12 | 2001-07-14 | 2002-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-01-12 | 2005-07-14 | 2006-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-01-12 | 2009-07-14 | 2010-01-13 | $7700.00 | Window Closed / Lapsed |