US5345457A
Expired / Lapsed
US
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Dual wavelength laser system with intracavity sum frequency mixing
Assignee: Q-PEAK Inc
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Filing: 1993-10-15
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Granted: 1994-09-06
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Expires: 2013-10-15
Abstract
Abstract A dual-wavelength laser system with intracavity, sum-frequency mixing including a bifurcated resonant cavity having a first arm, a second arm and a common arm; a first laser element located in the first arm for providing a first input laser beam of a first wavelength; a second laser element located in the second arm for providing a second input laser beam of a second wavelength; a nonlinear-mixing element in the common arm; and a beam combining device for combining the first and second beams and submitting them to the nonlinear-mixing element for providing an output laser beam of a third wavelength whose energy is the sum of the energy of the input laser beams.
Inventors
- 👤 Henry H. Zenzie
- 👤 Peter F. Moulton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:32
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/10; H01S3/106; H01S3/108; H01S3/05; H01S3/06; H01S3/07; H01S3/08; H01S3/08086; H01S3/0809; H01S3/081; H01S3/0811; H01S3/082
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
112 words
A dual-wavelength laser system with intracavity, sum-frequency mixing comprising: a bifurcated resonant cavity having a first arm, a second arm and a common arm; a first laser element located in said first arm for producing a first laser beam of a first wavelength; a second laser element located in said second arm for producing a second input laser beam of a second wavelength; a nonlinear-mixing element in said common arm; and a beam combining device for combining said first and second beams and submitting them to said nonlinear-mixing element for producing an output laser beam of a third wavelength whose energy is the sum of the energy of the input laser beams.
Claim 2
Dependent Claim
112 words
A dual-wavelength laser system with intracavity, sum-frequency mixing comprising: a bifurcated resonant cavity having a first arm, a second arm and a common arm; a first laser element located in said first arm for producing a first laser beam of a first wavelength; a second laser element located in said second arm for producing a second input laser beam of a second wavelength; a nonlinear-mixing element in said common arm; and a beam combining device for combining said first and second beams and submitting them to said nonlinear-mixing element for producing an output laser beam of a third wavelength whose energy is the sum of the energy of the input laser beams.
Claim 3
Dependent Claim
18 words
The dual-wavelength laser system of claim 1 in which said first laser element is a solid state element.
Claim 4
Dependent Claim
18 words
The dual-wavelength laser system of claim 1 in which said second laser element is a solid state element.
Claim 5
Dependent Claim
19 words
The dual-wavelength laser system of claim 1 in which said first and second laser elements are the same material.
Claim 6
Dependent Claim
18 words
The dual-wavelength laser system of claim 1 in which each of said laser elements includes a pumping device.
Claim 7
Dependent Claim
16 words
The dual-wavelength laser system of claim 5 in which each said pumping device is a flashlamp.
Claim 8
Dependent Claim
18 words
The dual-wavelength laser system of claim 1 in which said first and second laser elements include infrared lasers.
Claim 9
Dependent Claim
22 words
The dual-wavelength laser system of claim 7 in which said first wavelength is 1064 nm and said second wavelength is 1318 nm.
Claim 10
Dependent Claim
17 words
The dual-wavelength laser system of claim 1 in which said nonlinear-mixing element is potassium titanyl phosphate (KTP).
Claim 11
Dependent Claim
18 words
The dual-wavelength laser system of claim 1 in which said nonlinear-mixing element is lithium niobate (LiNbO 3 ).
Claim 12
Dependent Claim
16 words
The dual-wavelength laser system of claim 1 in which said nonlinear-mixing element is lithium triborate (LBO).
Claim 13
Dependent Claim
18 words
The dual-wavelength laser system of claim 1 in which said beam combining device includes a Brewster prism assembly.
Claim 14
Dependent Claim
17 words
The dual-wavelength laser system of claim 1 in which said beam combining device includes a dichroic mirror.
Claim 15
Dependent Claim
26 words
The dual-wavelength laser system of claim 1 in which said first and second beams are orthogonally polarized and said beam combining device is a polarizer element.
Claim 16
Dependent Claim
16 words
The dual-wavelength laser system of claim 14 in which said first wavelength is approximately 1064 nm.
Claim 17
Dependent Claim
16 words
The dual-wavelength laser system of claim 14 in which said second wavelength is approximately 1318 nm.
Claim 18
Dependent Claim
16 words
The dual-wavelength laser system of claim 14 in which said third wavelength is approximately 589 nm.
Claim 19
Dependent Claim
131 words
A dual-wavelength infrared laser system with intracavity, sum-frequency mixing for yellow light generation for vascular lesion removal, comprising: a bifurcated resonant cavity having a first arm, a second arm and a common arm; a first solid state H2 pfm infrared laser element located in said first arm for producing a first laser beam at approximately 1 micron; a second solid state H2 pfm infrared laser element located in said second arm for producing a second input laser beam at approximately 1.3 microns; a nonlinear-mixing element in said common arm; and a beam combining device for combining said first and second beams and submitting them to said nonlinear-mixing element for producing an output laser beam of a yellow wavelength whose energy is the sum of the energy of the input laser beams.
Claim 20
Dependent Claim
131 words
A dual-wavelength infrared laser system with intracavity, sum-frequency mixing for yellow light generation for vascular lesion removal, comprising: a bifurcated resonant cavity having a first arm, a second arm and a common arm; a first solid state H2 pfm infrared laser element located in said first arm for producing a first laser beam at approximately 1 micron; a second solid state H2 pfm infrared laser element located in said second arm for producing a second input laser beam at approximately 1.3 microns; a nonlinear-mixing element in said common arm; and a beam combining device for combining said first and second beams and submitting them to said nonlinear-mixing element for producing an output laser beam of a yellow wavelength whose energy is the sum of the energy of the input laser beams.
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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) | 1997-09-05 | 1998-03-07 | 1998-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-09-05 | 2002-03-07 | 2002-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-09-05 | 2006-03-07 | 2006-09-06 | $7700.00 | Window Closed / Lapsed |