Nonlinear optical wavelength converters with feedback
December 3, 2012. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesNear millimeter wavelength modulator and tunable oscillator Diode end pumped laser and harmonic generator using same CPM pulse laser device having a feedback means Frequency doubled, cavity dumped feedback laser Generation of coherent optical radiation by optical mixing Mode-locked laser Optical analog-digital converter provided with a nonlinear optical element and an optical feedback system for the output lights of said element Frequency conversion of optical radiation Pulsed laser Patent #: 5054027 InventorAssigneeApplicationNo. 985470 filed on 12/03/1992US Classes:359/328, Harmonic generator359/326, OPTICAL FREQUENCY CONVERTER372/22Frequency multiplying (e.g., harmonic generator)ExaminersPrimary: Lee, John D.Attorney, Agent or FirmForeign Patent References
International ClassH01S 003/109AbstractAn optical frequency conversion apparatus includes at least one resonator (10) having an optical path defined by a plurality of mirrors (M1, M2). A nonlinear conversion medium (10a) is disposed within the optical path of the resonator, the nonlinear conversion medium receiving optical radiation at a first frequency and outputting optical radiation at a second frequency that is a multiple of the first frequency. One of the plurality of mirrors is an input mirror (M1) for coupling into the resonator a pulse of radiation having the first frequency, and one of the mirrors is an output mirror (M2) for out-coupling a pulse of radiation having a frequency that is a multiple of the first frequency. The input mirror has a predetermined reflectivity that is selected to cause the pulse of radiation to have an intensity sufficient to maximize, with respect to the pulse of radiation, a conversion efficiency of the nonlinear medium, without exceeding a damage threshold for the nonlinear conversion medium or for any of the plurality of mirrors. The teaching of the invention is also applied to third, fourth, and higher order harmonic generators, to optical parametric oscillators and amplifiers, and to optical mixers. Also disclosed is an intra-cavity wavefront distortion corrected second harmonic generator that compensates for heating of a nonlinear conversion medium at high average powers.Other References
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