Abstract

A laser system based on difference frequency generation in non-oxide nonlinear crystals (LiInS2) emitting narrow linewidth mid-IR radiation at ~ 6.8 μm is presented. The system is developed as prototype of the laser system needed for the purposes of the muonic-hydrogen spectroscopy. The generated radiation has a narrow linewidth < 1.5 GHz, reaches an output energy more than 100 μJ, with 10 ns long pulses at 50 Hz frequency repetition rate and is tunable in the spectral range 6695 – 6870 nm. These results prove the suitability of such an approach for building a laser system with output parameters matching the requirements of the muonic-hydrogen experiment.

© 2015 Optical Society of America