Abstract

A 1.88 μm Ba(NO3)2-based stimulated Raman scattering (SRS) laser pumped by a potassium-titanyl-phosphate-based optical parametric oscillator (OPO) laser is presented. Under the pumping energy of a 130 mJ 1064 nm Q-switched Nd:YAG laser, a 40 mJ 1.57 μm laser is achieved; the maximum output energy of the 1.88 μm Raman laser reaches 7.5 mJ with a pulse duration of 5.3 ns at repetition rates of 10 Hz, and the corresponding total optical conversion efficiency is about 5.8%. The combination of the SRS and OPO techniques significantly extends the wavelength from 1.064 to 1.57 μm (OPO) and then demonstrates Stokes-shifting to 1.88 μm (SRS).

© 2016 Chinese Laser Press

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