Self-frequency-sum mixing in Nd doped nonlinear crystals for laser generation in the three fundamental colours - The NYAB case

When combined with a suitable nonlinear crystal host, several coincidences occurring in Nd3+ ions allow for simultaneous generation of laser radiation in the three fundamental colours; red, green and blue (RGB) in the same solid state laser crystal. We show experimentally this possibility in neodymium doped yttrium aluminium berate (NYAB) Nd3-:YAl3(BO3)(4), although the same achievement is very likely to be possible in other nonlinear crystals containing Nd3+ laser active ions. (C) 2001 Elsevier Science B.V. All rights reserved.