The wave equations for describing evolution of amplitudes of the pump and Stokes pulses in the Raman cavity have been derived. Results of the theoretical modeling have been analyzed for the conditions of an experiment with the Raman laser on barium nitrate crystal under the nanosecond pulse pump at 532 nm. Numerically calculated energy characteristics of the Raman laser as well as space-time dynamics of the Stokes generation have been demonstrated to be in reasonable agreement with the experiment. | Communications in Physics, Vol. 28, No. 4 (2018), pp. 287-300 DOI: RAMAN LASER WITH A SINGLY RESONANT CAVITY: THEORETICAL MODEL AND EXPERIMENT S. VOITIKOV1,† , R. CHULKOV1 , V. MARKEVICH1 , V. ORLOVICH1 , DO QUOC KHANH2 , NGUYEN XUAN TU2 AND PHAM HONG MINH2 1 . Stepanov Institute of Physics, 220072, Nezavisimosti ave. 68-2, Minsk, Belarus 2 Institute of Physics, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Rd., Cau Giay Distr., Hanoi, Vietnam † E-mail: Received 08 August 2018 Accepted for publication 23 November 2018 Published 15 December 2018 Abstract. A semiclassical theoretical model of a Raman laser possessing a cavity which is resonant at the Stokes wavelength and not resonant at the pump wavelength has been developed. The wave equations for describing evolution of amplitudes of the pump and Stokes pulses in the Raman cavity have been derived. Results of the theoretical modeling have been analyzed for the conditions of an experiment with the Raman laser on barium nitrate crystal under the nanosecond pulse pump at 532 nm. Numerically calculated energy characteristics of the Raman laser as well as space-time dynamics of the Stokes generation have been demonstrated to be in reasonable agreement with the experiment. Keywords: stimulated Raman scattering, solid-state laser, external cavity Raman laser. Classification numbers: , , . c 2018 Vietnam Academy of Science and Technology 288 RAMAN LASER WITH A SINGLY RESONANT CAVITY: THEORETICAL MODEL AND EXPERIMENT I. INTRODUCTION The effect of stimulated Raman scattering (SRS) is known to be widely used for downfrequency conversion [1, 2], pulse compression [3], improvement of beam quality (the Raman beam clean-up [4]) and spectral contrast [5] of laser radiation. Raman conversion has been successfully demonstrated under the time scales ranging from continuous-wave regime [6] to femtoseconds [7]. In many .
