Optimized signal control in frequency-doubled laser sources

A method of operating a system for generating a projected laser image, the system comprising at least one laser source and associated laser projection optics, wherein the laser source comprises a semiconductor laser optically coupled to a wavelength conversion device, the semiconductor laser comprises a gain control element for intensity modulation of the laser source and one or more complementary control elements for controlling a complementary characteristic of the semiconductor laser, and the method comprises:

• utilizing a gain control signal applied to the gain control element for the intensity modulation;
• utilizing a complementary control signal applied to the complementary control element to improve emission in the laser source;
• and
• utilizing the laser source and the projection optics to display a sequence of pixelized image frames, wherein
• the sequence of pixelized image frames comprises an alternating sequence of relatively high intensity active projection periods ModON and relatively low intensity inactive projection periods ModOFF,
• the complementary control signal transitions between an active state QON during the relatively high intensity active projection periods ModON and an inactive state QOFF during the relatively low intensity inactive projection periods ModOFF, and
• the transition of the complementary control signal from the inactive state QOFF to the active state QON is conditioned to anticipate initiation of relatively high intensity active projection periods ModON such that it is optimized upon initiation of the relatively high intensity active projection periods ModON.