Method of stabilizing a laser apparatus with wavelength converter

Ole Bjarlin Jensen (Inventor), Peter Eskil Andersen (Inventor), Paul Michael Petersen (Inventor), André Müller (Inventor)

Research output: Patent

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Abstract

A method of controlling beam quality and stability of a laser apparatus, the laser apparatus comprising, a diode laser (10) providing first radiation of at least a first wavelength, and a frequency conversion unit (12) configured to frequency-convert the first radiation from the diode laser and to output the frequency-converted radiation (213), the frequency-converted radiation having at least a second wavelength different from the first wavelength, the diode laser (10) comprising at least a first and a second section (222,223), a first contact (220) for injecting a first current (I1) into the first section (222), a second contact (221) for injecting a second current (I2) into the second section (223), and means for controlling a temperature of the diode laser; wherein the method comprises monitoring a first parameter indicative of the power content of a dominant lobe of the first radiation; iteratively determining a combination of respective values of the first current, the second current and the temperature at which combination of respective values the monitored first parameter and a stability parameter indicative of a fluctuation over time of the monitored first parameter each fulfils a respective predetermined optimization criterion; and setting the first current, the second current, and the temperature to the determined combination of respective values
Original languageEnglish
IPCH01S3/0941; H01S3/131; H01S5/00; H01S5/026
Patent numberWO2013135271
Filing date13/03/2012
CountryInternational Bureau of the World Intellectual Property Organization (WIPO)
Publication statusPublished - 2013

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