Red, green, and blue laser light from a single Nd:YAl3(BO3)4 crystal based on laser oscillation at 1.3 μm

Laser radiation corresponding to the three fundamental colors (red, green, and blue) has been generated from the same ${\mathrm{Nd:YAl}}_{\mathrm{3}}{\mathrm{(BO}}_{\mathrm{3}}{\mathrm{)}}_{\mathrm{4}}$ crystal, operating on a fundamental laser wavelength of 1338 nm in an end-pumping configuration. Continuous wave generation was obtained by pumping with a tunable Ti: sapphire laser. Red (669 nm) has been obtained by self-frequency doubling of the fundamental laser line. Green (505 nm) and blue (481 nm) have been obtained by self-sum-frequency mixing of the fundamental laser radiation at 1338 nm and the pump radiation (807 nm for green and 755 nm for blue).