US5095491A
Expired / Lapsed
US
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Laser system and method
Assignee: International Business Machines Corp
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Filing: 1991-04-12
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Granted: 1992-03-10
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Expires: 2011-04-12
Abstract
Abstract A laser system uses a nonlinear ring resonator to produce Type-II nonlinear second harmonic generated light. The reflective surfaces of the resonator are all symmetrical with respect to the crystal axes. This allows orthogonally polarized light to be resonated along the same beampath in the resonator without experiencing bireflection.
Inventors
- 👤 William J. Kozlovsky
- 👤 William P. Risk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:49
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/35; G02F1/37; G02F1/3501; G02F1/3509; G02F1/353; G02F1/3542; H; H01; H01S; H01S5/00; H01S5/06; H01S5/068; H01S5/0683; H01S5/0687
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
96 words
A laser system comprising: a first radiation source for producing radiation of a first polarization; a second radiation source for producing radiation of a second polarization different from said first polarization; a nonlinear crystal for receiving the first and second polarization radiation and producing second harmonic radiation; and a ring resonator integral to the nonlinear crystal for resonating the first and second polarization radiation, the resonator having a plurality of reflective surfaces which are symmetrical with respect to the axes of the nonlinear crystal, whereby the first and second polarization radiation is resonated without experiencing bireflection.
Claim 2
Dependent Claim
96 words
A laser system comprising: a first radiation source for producing radiation of a first polarization; a second radiation source for producing radiation of a second polarization different from said first polarization; a nonlinear crystal for receiving the first and second polarization radiation and producing second harmonic radiation; and a ring resonator integral to the nonlinear crystal for resonating the first and second polarization radiation, the resonator having a plurality of reflective surfaces which are symmetrical with respect to the axes of the nonlinear crystal, whereby the first and second polarization radiation is resonated without experiencing bireflection.
Claim 3
Dependent Claim
15 words
The system of claim 1, wherein the first and second radiation sources are diode lasers.
Claim 4
Dependent Claim
14 words
The system of claim 1, wherein the nonlinear crystal is a Type-II nonlinear crystal.
Claim 5
Dependent Claim
15 words
The system of claim 1, wherein the reflective surfaces form a paralellogram shaped resonator path.
Claim 6
Independent Claim
101 words
A method for frequency conversion of radiation comprising the steps of: generating a first radiation beam of a first polarization; generating a second radiation beam of a second polarization different from said first polarization; coupling the first and second polarization radiation beams to a nonlinear crystal; and resonating the first and second polarization radiation beams inside the nonlinear crystal by reflecting the beams off of a plurality of reflective surfaces which are symmetrical with respect to the axes of the nonlinear crystal to produce second harmonic generated radiation, whereby the first and second polarization radiation beams are resonated without experiencing bireflection.
Claim 7
Independent Claim
101 words
A method for frequency conversion of radiation comprising the steps of: generating a first radiation beam of a first polarization; generating a second radiation beam of a second polarization different from said first polarization; coupling the first and second polarization radiation beams to a nonlinear crystal; and resonating the first and second polarization radiation beams inside the nonlinear crystal by reflecting the beams off of a plurality of reflective surfaces which are symmetrical with respect to the axes of the nonlinear crystal to produce second harmonic generated radiation, whereby the first and second polarization radiation beams are resonated without experiencing bireflection.
Claim 8
Dependent Claim
14 words
The method of claim 5 wherein, the radiation beams are produced by laser diodes.
Claim 9
Dependent Claim
14 words
The method of claim 5 wherein, the nonlinear crystal is a Type-II nonlinear crystal.
Claim 10
Dependent Claim
15 words
The method of claim 5, wherein the reflective surfaces form a parallelogram shaped resonator path.
Claim 11
Dependent Claim
98 words
A laser system comprising: a first laser for producing a radiation beam of a first polarization; a second laser for producing a radiation beam of a second polarization different from said first polarization; a nonlinear crystal for receiving the first and second polarization radiation and for producing second harmonic radiation; and a resonator for resonating the first and second polarization radiation, having four reflective surfaces integral to the nonlinear crystal, each of the reflective surfaces being symmetrical with respect to the axes of the nonlinear crystal, whereby the first and second polarization radiation is resonated without experiencing bireflection.
Claim 12
Dependent Claim
98 words
A laser system comprising: a first laser for producing a radiation beam of a first polarization; a second laser for producing a radiation beam of a second polarization different from said first polarization; a nonlinear crystal for receiving the first and second polarization radiation and for producing second harmonic radiation; and a resonator for resonating the first and second polarization radiation, having four reflective surfaces integral to the nonlinear crystal, each of the reflective surfaces being symmetrical with respect to the axes of the nonlinear crystal, whereby the first and second polarization radiation is resonated without experiencing bireflection.
Claim 13
Dependent Claim
17 words
The system of claim 9, wherein the first and second radiation beams are 995-1000 nm in wavelength.
Claim 14
Dependent Claim
25 words
The system of claim 9, wherein the first radiation beam is 810-820 nm in wavelength and the second radiation beam is 1040-1070 nm in wavelength.
Claim 15
Dependent Claim
11 words
The system of claim 9, wherein the nonlinear crystal is KTP.
Claim 16
Dependent Claim
26 words
The system of claim 9, wherein the reflective surfaces are arranged such that the first and second polarization beams travel along a parallelogram shape beam path.
Claim 17
Dependent Claim
144 words
A laser system comprising: a first radiation source for producing radiation of a first polarization; a second radiation source for producing radiation of a second polarization different from said first polarization; a nonlinear crystal for receiving the first and second polarization radiation and for producing second harmonic radiation; a ring resonator arranged around the nonlinear crystal for resonating the first and second polarization radiation, the resonator having a plurality of reflective surfaces which are symmetrical with respect to the axes of the nonlinear crystal, whereby the first and second polarization radiation is resonated without experiencing bireflection; an optical data storage medium; an optical transmission means for directing said second harmonic radiation from the resonator to the optical data storage medium; and an optical reception means for receiving a reflected second harmonic radiation beam from the medium and for providing a data signal responsive thereto.
Claim 18
Dependent Claim
144 words
A laser system comprising: a first radiation source for producing radiation of a first polarization; a second radiation source for producing radiation of a second polarization different from said first polarization; a nonlinear crystal for receiving the first and second polarization radiation and for producing second harmonic radiation; a ring resonator arranged around the nonlinear crystal for resonating the first and second polarization radiation, the resonator having a plurality of reflective surfaces which are symmetrical with respect to the axes of the nonlinear crystal, whereby the first and second polarization radiation is resonated without experiencing bireflection; an optical data storage medium; an optical transmission means for directing said second harmonic radiation from the resonator to the optical data storage medium; and an optical reception means for receiving a reflected second harmonic radiation beam from the medium and for providing a data signal responsive thereto.
References Cited (Backward Citations)
US4791631A
Cited
US5048047A
Cited
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