Stationary generation of diode-pumped self-Raman Nd:YVO4/YVO4 composite crystal laser

Abstract

Output power dependences of composite Nd 3+ :YVO 4 Raman laser stationary generation on the longitudinal diode pump power are measured at different transmissions of the output mirror at the Stokes radiation frequency. The deviation of the measured dependences from linear is explained by the influence of thermal effects on both the overlap of the beams and diffraction losses. A method to estimate the laser and Stokes losses in the cavity and the parameters characterizing the overlap of the laser radiation with the pump and Stokes beams is proposed. A Stokes-component of power 2.1 W is obtained and corresponds to 12% diode-toStokes efficiency.

Eye-safe solid-state quasi-CW Raman laser with millisecond pulse duration

“…For example, for pump power level of 17 W the optimal transmission T s is 1.1%, which is close to the one for a qCW 1.2 µm CWSSRL at the diode pump power level of the same order [30]. With an output coupler with this transmission the laser under consideration should provide 117 mW of Stokes output power at the diode pump power level of 17 W which corresponds to efficiency of 0.7% with respect to the diode pump power.…”

“…To simplify calculations we used fixed values of the beam sizes (P abs = 3.4 W); thus the slope of the theoretical curve is fixed. (Variation of the beams overlap with the pump power in the model used is given in paper [30]). Nevertheless, even with constant beam sizes the results provided by the model are in good agreement with the experimental data.…”

Theory of solid state Raman laser stationary generation of visible radiation

“…As it follows from [18], stationary SFG of the frequency ν SL = ν S + ν L in the laser shown schematically in Fig. 1…”

“…The coefficients G, K SL , and b/a are defined by properties of the respective media and overlap integrals of the interacting beams. As shown in [18][19][20], the relations for G and K LS are…”

“…The ratio b/a has the meaning of the efficiency of the conversion of the diode pump radiation to the fundamental radiation. According to [18][19][20], it can be expressed as…”