Study On 355nm Ultraviolet Laser Pump Ba(NO₃)₂ Crysal Raman Scattering

Stimulated Raman Scattering is a very effective measure to change frequency.And Stimulated Raman Scattering in Ba(NO₃)₂ crystal at Ultraviolet band was studied by building the Flash lamp-pumped E-O Q-switched all-solid-state Raman laser experiment system,and the fundamental wave is 1064nm with the single pulse energy of 1J and the pulse width of 9ns,then the single pulse energy of 140.76mJ at 355nm with the pulse width of 8ns was obtained through second harmonic generation of KTP crystal and Third harmonic generation through BBO crystal.And 355 nm is used to be the pumping source to cause Stimulated Raman Scattering in Ba(NO₃)₂ crystal to acquire the Raman scattering light.It's proved to be 368.15nm by a spectrometer,with the pulse width of 7.1ns,and frequency shift is 1006 cm^-1 and the gain coefficient is 78.50cm/GW.So Ba(NO₃)₂ crystal is a kind of excellent Raman active crystal to obtain the Strokes with high efficiency,and Raman Shift course from Stimulated Raman Scattering at ultraviolet wave band is easy to achieve with the pulse width of nanosecond.The results are significant for obtaining laser at ultraviolet wave by Stimulated Raman Scattering technic in theory and practicality.