Second-Stokes YVO_4/Nd:YVO_4/YVO_4self-frequency Raman laser

Abstract

We demonstrated an efficient second-Stokes Raman laser emission at 1313 nm based on self-frequency stimulated Raman scattering from a diode-end-pumped actively Q-switched YVO(4)/Nd:YVO(4)/YVO(4) laser at 1064 nm for the first time, to the authors' knowledge. A double-end diffusion-bonded Nd:YVO(4) composite crystal was adopted for sufficiently improving the thermal lensing effect in the course of self-frequency stimulated Raman scattering operation. With an incident pump power of 14.6 W and a pulse repetition (PRR) of 40 kHz, a maximum average output power of 2.34 W was obtained, corresponding to an optical-to-optical conversion efficiency of 16%. Pulse width and peak power were 1.2 ns and 49 kW, respectively.

Second-Stokes dual-wavelength operation at 1321 and 1325 nm ceramic Nd:YAG/BaWO_4 Raman laser

“…The corresponding pulse energy and peak power of the second-Stokes dual-wavelength Raman lasers were 0.11 mJ and 38.4 kW, respectively. The present second-Stokes pulse width (2.9 ns) is less than the result (9.2 ns) obtained by a diode-side-pumped crystal Nd:YAG=BaWO 4 Raman laser [12] and greater than the result (1.2 ns) obtained by a diode-end-pumped Nd:YVO 4 self-Raman laser [15]. The output beam profiles were monitored by a NanoScan beam analyzer (Photons Inc.) and a precision linear stage (Zolix, Inc.).…”

Dual-wavelength actively Q-switched diode-end-pumped ceramic Nd:YAG/BaWO4Raman laser operating at 1240 and 1376 nm

“…As is known, stimulated Raman scattering (SRS) is a cascading nonlinear frequency conversion process. When the first Stokes Raman generation reaches adequate power intensity, it can act as a pump source for SRS to generate a second Stokes generation [12,13]. To our knowledge, in 2009, the first CW Raman laser operating simultaneously at frequencies of two Stokes components was demonstrated by Grabchikov et al [14].…”

Multi-wavelength continuous-wave Nd:YVO4 self-Raman laser under in-band pumping*

“…[14][15][16][17][18][19] Compared with fundamental lasers, Raman lasers have the advantages of high beam quality, short pulse duration, and pure spectrum. [20,21] In the CW Raman laser, the Raman conversion efficiency is very sensitive to the thermal effect and cavity loss. As reported in Ref.…”