Patent ID: 9223186
Filing Date: 2015-12-29
Classification: G02F,H01S

Abstract:
1. A method of operating a frequency converted laser source comprising at least one semiconductor laser and a wavelength conversion device optically coupled to the at least one semiconductor laser, the method comprising: operating the frequency converted laser source to produce a frequency converted output beam from the wavelength conversion device while said wavelength conversion device is subjected at least some of the time to visible light energy density greater than 0.5 MW/cm providing a degradation power threshold that corresponds to an output power of the frequency converted output beam of the wavelength conversion device at which photo-degradation begins to occur in the wavelength conversion device; providing a recovery threshold temperature T intermittently heating the wavelength conversion device above and below the recovery threshold temperature T holding the wavelength conversion device above the recovery threshold temperature T (i) includes a waveguide; and/or (ii) comprises MgO-doped periodically poled non-linear material.