“…High peak power solid state 2-3 µm lasers have triggered considerable attention due to their applications in laser medicine, remote sensing, high resolution molecular spectroscopy, and optical communications [1,2]. Thus far, Stimulate Raman Scattering (SRS) in crystalline materials has been demonstrated as one of the most important nonlinear frequency conversion methods for mid-IR laser sources [3][4][5], among which, the output laser wavelength depends on vibrational frequencies of the Raman crystal and the fundamental frequency of the excitation laser.…”