1 kHz, multi-wavelength MOPA system with narrow-pulse-width and single-longitudinal-mode output

We report a compact, all-solid-state laser generating simultaneous high-energy, narrow-linewidth pulses at 1064, 532, 355, and 266 nm. A volume Bragg grating (VBG) output coupler locks the Nd:YAG oscillator to single-longitudinal-mode (SLM) operation, yielding 2.93 ns pulses with a 2.8 pm linewidth at 1 kHz. The fundamental output is boosted to 32 mJ via four-stage amplification. Subsequent nonlinear frequency conversion delivers simultaneous pulse energies of 10.6, 6.8, 5.8, and 2.3 mJ, respectively. Pulse durations remain below 3 ns across all channels, with estimated harmonic linewidths sub-1 pm. This high-brightness source is tailored for advanced, high-resolution remote atmospheric sensing applications.