Laser system and method having a nonlinear crystal resonator
First Claim
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1. A laser system comprising:
- a nonlinear crystal for receiving a first and a second polarization radiation beams and producing second harmonic radiation; and
a ring resonator integral to the nonlinear crystal for resonating the first and second polarization radiation beams, the resonator having a plurality of reflecting surfaces which form a first beam path for the first polarization radiation beam and a second beam path for the second polarization radiation beam, wherein a portion of the first and second beam paths overlap along an overlap segment, the beams in the overlap segment having a direction of propagation which is parallel to a crystalographic axis of the nonlinear crystal.
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Abstract
A laser system uses a nonlinear crystal ring resonator to produce Type II nonlinear second harmonic generated light. The reflective surfaces of the resonator are oriented to form two closed beam paths for the two fundamental frequency light beams having different orthogonal polarization. The two beam paths overlap along one segment which is parallel to an axis of the nonlinear crystal. Second harmonic generated light is produced along this segment of the beam paths.
23 Citations
41 Claims
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1. A laser system comprising:
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a nonlinear crystal for receiving a first and a second polarization radiation beams and producing second harmonic radiation; and a ring resonator integral to the nonlinear crystal for resonating the first and second polarization radiation beams, the resonator having a plurality of reflecting surfaces which form a first beam path for the first polarization radiation beam and a second beam path for the second polarization radiation beam, wherein a portion of the first and second beam paths overlap along an overlap segment, the beams in the overlap segment having a direction of propagation which is parallel to a crystalographic axis of the nonlinear crystal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A laser system comprising:
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a first radiation source for producing a first radiation beam of a first polarization; a second radiation source for producing a second radiation beam of a second polarization different from said first polarization; a nonlinear crystal for receiving the first and second polarization radiation beams and producing second harmonic radiation; and a ring resonator integral to the nonlinear crystal for resonating the first and second polarization radiation beams, the resonator having a plurality of reflecting surfaces which form a first beam path for the first polarization radiation beam and a second beam path for the second polarization radiation beam, wherein a portion of the first and second beam paths overlap along an overlap segment, the beams in the overlap segment having a direction of propagation which is parallel to a crystalographic axis of the nonlinear crystal. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A method for frequency conversion of radiation comprising the steps of:
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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 to produce second harmonic radiation; and resonating the first and second polarization radiation beams inside a ring resonator integral to the nonlinear crystal by reflecting the beams off of a plurality of reflecting surfaces which form a first beam path for the first polarization radiation beam and a second beam path for the second polarization radiation beam, wherein a portion of the first and second beam paths overlap along an overlap segment, the beams in the overlap segment having a direction of propagation which is parallel to a crystalographic axis of the nonlinear crystal. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. A laser system comprising:
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a first radiation source for producing a first radiation beam of a first polarization; a second radiation source for producing a second radiation beam of a second polarization different from said first polarization; a nonlinear crystal for receiving the first and second polarization radiation beams and producing second harmonic radiation; a ring resonator integral to the nonlinear crystal for resonating the first and second polarization radiation beams, the resonator having a plurality of reflective surfaces which form a first beam path for the first polarization radiation beam and a second beam path for the second polarization radiation beam, wherein a portion of the first and second beam paths overlap along an overlap segment, the beams in the overlap segment having a direction of propagation which is parallel to a crystalographic axis of the nonlinear crystal; a means for receiving 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 return second harmonic radiation beam from the medium and for providing a data signal responsive thereto. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38, 39, 40, 41)
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Specification