Patent ID: 6714567
Filing Date: 2004-03-30
Classification: G02F,G11B

Abstract:
A laser light generating apparatus comprising:a first laser light generator for outputting laser light with a first wavelength; a first resonator for resonating the laser light with the first wavelength; a second laser light generator for outputting laser light with a second wavelength; a second resonator arranged adjacent said first resonator for resonating the laser light with the second wavelength; a nonlinear optical device included in the first resonator and the second resonator and having an incident surface and an exit surface at respective ends through which the laser light with the first wavelength and the laser light with the second wavelength enter and exit; and wherein the laser light generating apparatus generates laser light with a third wavelength through sum-frequency mixing of the laser light with the first wavelength and the laser light with the second wavelength being in a crossing relationship when passing through the nonlinear optical device; optical elements respectively arranged in the first and second resonators for setting a respective incidence of the laser light with the first wavelength and the laser light with the second wavelength relative to the incident surface of the nonlinear optical device, so that the laser light with the first wavelength and the laser light with the second wavelength do not share an optical axis inside the nonlinear optical device, whereby the laser light with the first wavelength and the laser light with the second wavelength have spatially separated beam central axes and enter into the nonlinear optical device through the incident surface; and the laser light with the first wavelength, the laser light with the second wavelength, and the laser light with the third wavelength have spatially separated beam central axes, exit from the nonlinear optical device through the exit surface, and have different optical paths.