Simultaneous generation of violet, blue, and green lasers using Nd:YAl₃(BO₃)₄ channel waveguides under pumping at 815 nm

Abstract Violet, blue, and green lasers were simultaneously generated by nonlinear processes using ultrafast laser inscribed neodymium‐doped yttrium aluminum borate (Nd:YAl₃(BO₃)₄ or Nd:YAB) channel waveguides under pumping at 815 nm. These visible lasers were generated by the frequency doubling, self‐frequency summing, and self‐frequency doubling processes based on a 1062 nm laser radiation that corresponded to the ⁴F_3/2 → ⁴I_11/2 transition of Nd³⁺ ions. Further, the wavelength tunability for the violet and blue lasers was achieved by simply tuning the pump wavelength within the ⁴I_9/2 → ⁴F_5/2 transition. The results obtained indicate that Nd:YAB waveguides are promising candidates for efficient compact visible laser sources. (© 2013 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)