Simultaneous stimulated Raman scattering and optical frequency mixing in lithium iodate

Abstract

Efficient stimulated Raman scattering (SRS) has recently been achieved in lithium iodate (LiIO3) at kHz PRF’s, thereby producing substantial average output powers in the first and second Stokes lines. In this letter, we show that the same LiIO3 crystal that serves as the Raman medium can also be used to generate the second harmonics and sum frequencies of the pump and Stokes lines. By rotating a LiIO3 crystal placed inside a Nd : YAlO3 laser, we have successively generated phase-matched outputs at 0.54 μm (1.13 W), 0.565 μm (78 mW), 0.592 μm (685 mW), 0.622 μm (98 mW), and 0.655 μm (107 mW).