External beam combining of multiple lasers
July 28, 2006. 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 ReferencesAdaptive correction of linear phase aberrations in laser amplifier systems Laser having a nonlinear phase conjugating reflector Adaptive laser output coupler Agile beam laser Synchronously-pumped phase-conjugate laser Optical device for real-time amplification of the radiant energy of a beam Passive phase conjugate mirror Device for recording a coherent image in a multimode optical cavity Device for memory-storage of a coherent image in a multitude optical cavity Phase coupling multiple lasers Patent #: 4648092 InventorsAssigneeApplicationNo. 06/890055 filed on 07/28/1986US Classes:359/299, Opto-optical device359/298, Light wave directional modulation (e.g., deflection or scanning is representative of the modulating signal)372/21Nonlinear deviceExaminersPrimary: LaRoche, Eugene R.Assistant: Shingleton, Michael B Attorney, Agent or FirmInternational ClassesH01S 3/23 (20060101)G02F 1/35 (20060101) AbstractA coupled laser system includes a plurality of substantially parallel beams of coherent radiation with an output beam of coherent radiation at an oblique angle with respect to the plurality of beams. A photorefractive element is positioned to receive the plurality of beams and the output beams, the beams being frequency locked to within the photorefractive bandwidth of the photorefractive element such that laser energy is diffracted from the plurality of beams to the output beam by means of two-wave mixing. A lens may be used for focussing the parallel beams in the photorefractive element, while a plurality of mirrors may be supplied for adjusting the orientation of the output beam within the photorefractive element. Another coupled laser system includes a plurality of lasers, each laser providing a beam of coherent radiation, an optical resonant cavity, and a photorefractive element positioned within the resonant cavity, the beam being frequency locked to within the photorefractive bandwidth of the photorefractive element such that laser energy is diffracted from the coherent beams to a coupling beam in the resonant cavity by means of two-wave mixing. The resonant cavity is defined by a unidirectional ring resonator, with a partially reflecting mirror, a first substantially 100% reflecting mirror, and a second substantially 100% reflecting mirror.Other References
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