Two-Color Picosecond Raman Laser on Water with Multiple Temporal Compression of the Stokes Pulse in a Collimated Beam

Abstract

For the first time to our knowledge, we report a 10-fold temporal compression of stimulated Raman scattering (SRS) pulses in bulk double distilled water in a 30-cm long cuvette pumped by a collimated beam of a picosecond Nd³⁺:YAP laser (60 ps, 540 nm). The effect of the pump pulse forerunning by the SRS pulse due to group velocity mismatch and a large red shift of the Stokes component of SRS pulses in water on the Stokes pulse temporal compression coefficient is discussed.