Second-harmonic generating apparatus

Details Second-harmonic generating apparatus Second-harmonic generating apparatus

1991-08-27

1993-08-03

Scott, Jr.

Coherent light generators

Particular beam control device

Nonlinear device

372 20, 372 21, 372 64, 372100, 359328, H01S 310

Patent

active

052336204

ABSTRACT:
A second-harmonic generating device includes a laser diode for providing light of a fundamental wave, having end-facets at least one being an antireflection coated end-facet. An optical reflector forms an external resonator with one of the end-facets of the laser diode whereby a portion of the light from the laser diode is returned by the reflector to the laser diode. A second-harmonic generation element is disposed between the laser diode and the optical reflector, for producing a second-harmonic of the fundamental wave while the fundamental wave propagates in the second-harmonic generation element. In this way, the optical reflector determines the wavelength of the light of the fundamental wave so that the laser diode produces light with a wavelength satisfying a phase matching condition of the second-harmonic generation element.

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