Patent ID: 9690165
Date: 2017-06-27
CPC Classifications: G02F

Claim:
1. A generator of laser beams in the infrared and in the visible domains, comprising: an elementary source for the emission of a continuous laser beam, at a first wavelength in the infrared domain; an optical amplifier for the amplification of the continuous laser beam providing an amplified laser beam at the first wavelength; a beam splitter allowing to split the amplified laser beam into a first laser beam at the first wavelength and a second laser beam at the first wavelength; a nonlinear frequency-doubling crystal, allowing a laser beam at a second wavelength to be generated on the basis of the first laser beam at the first wavelength, wherein the second wavelength is in the visible domain and wherein the first laser beam is directly coupled in the nonlinear frequency-doubling crystal; and a nonlinear frequency-sum-generating crystal, allowing a laser beam at a third wavelength to be generated on the basis of the second laser beam at the first wavelength and of the laser beam at the second wavelength, wherein the third wavelength is in the visible domain, wherein the second laser beam at the first wavelength is superposed on the laser beam at the second wavelength, the two beams being coupled into the nonlinear frequency-sum-generating crystal, and wherein the laser beam at the second wavelength, the laser beam at the third wavelength and the amplified laser beam at the first wavelength exhibit a fixed phase relation.