Temporal behavior of the Stokes and anti-Stokes lines in a high pressure hydrogen Raman shifter

Abstract

Stimulated Raman scattering (SRS) is a non-linear laser frequency conversion technique capable of generating multiple wavelengths of higher and lower frequencies. It has found applications in areas such as in lidar measurements, generation of short pulses, time-gated imaging, low-light-level imaging and two-color pump-probe plasma-induced spectral blue-shifting.
In this paper, we investigate the process of generating Stokes and anti-Stokes laser lines in a high pressure hydrogen cell excited by a 355 nm Nd:YAG laser. In particular, we study the temporal evolution of these lines as a function of the laser excitation energy.