Methods for Obtaining Stabilized Output Beams from Frequency Converted Light Sources and Frequency Converted Light Sources Utilizing the Same

A frequency converted light source comprising a semiconductor laser optically coupled to a wavelength conversion device and a package controller electrically coupled to the semiconductor laser and operable to control a wavelength of a fundamental beam emitted by the semiconductor laser, wherein the package controller is programmed to:

• provide a wavelength control signal to a wavelength selective section of the semiconductor laser when the frequency converted light source is powered on;
• sweep the wavelength control signal of the semiconductor laser over an initial signal range and measure an optical power of a resulting frequency converted output beam emitted from the wavelength conversion device;
• sweep the wavelength control signal of the semiconductor laser over at least one truncated signal range and measure the optical power of the resulting frequency converted output beam, wherein the at least one truncated signal range is less than a preceding signal range and the at least one truncated signal range is centered on a point corresponding to a maximum optical power of the resulting frequency converted output beam of the sweep of the wavelength control signal over the preceding signal range;
• determine an operational signal range for the wavelength control signal based on the optical power of the resulting frequency converted output beam of the sweep of the wavelength control signal over the preceding signal range;
• and
• initiate closed-loop feedback control of the wavelength control signal in the operational signal range.