Simultaneous generation of red, green, and blue continuous-wave laser radiation in Nd3+-doped aperiodically poled lithium niobate

Simultaneous generation of red, green, and blue continuous-wave laser radiation in a Nd3+-doped aperiodically poled lithium-niobate crystal is reported. Red (686 nm) and green (542 nm) are obtained by self-frequency-doubling fundamental infrared laser lines at 1084 and 1372 nm oscillating simultaneously. Blue (441 nm) is obtained by self-sum-frequency mixing of end-pump laser radiation at 744 nm and the fundamental laser line at 1084 nm. Other laser lines at 605 nm (orange) and 482 nm (blue) are simultaneously obtained by self-sum-frequency mixing of both infrared fundamentals and by self-sum-frequency mixing of pump laser radiation with the remaining fundamental line at 1372 nm, respectively. A weaker violet (372 nm) laser emission results from frequency doubling of the pump radiation.