## 1 Introduction  
Lasers that generate in pulse-burst mode can be used in high-speed photography, gas flow and plasma diagnostics, dermatology, cosmetic medicine, etc. [1; 2; 3]. According to a recent review [1], currently, most of these systems are based on 1064 nm Nd: YAG lasers. Wavelength diversification considerably increases the capabilities of systems. Many different methods of 1064 nm wavelength conversion, especially into the visible spectral range, have been investigated for use in pulse-burst-generation mode, the main examples being harmonic generation, optical parametric generation, and the pumping of dye lasers. Interestingly, wavelength conversion using stimulated Raman scattering applied to pulse-burst lasers has not been scrutinized previously. We found only two publications in which Raman conversion was produced in pulse-burst mode in the NIR range [4; 5]. To the best of our knowledge, there are no publications on the Raman conversion of multi-joule energy pulse-burst lasers into the visible range. For crystalline Raman lasers, most of the studies from the last decade [6; 7; 8; 9] have focused on increasing the average power of lasers operating in continuous-wave (CW) mode, or generating pulses with a high repetition rate (\(\sim\)10\({}^{5}\) Hz) and relatively low (\(<\)1 mJ) energy. In these cases, the Raman gain coefficient required for the efficient conversion of the pump radiation into Stokes components is achieved only if the pump radiation is concentrated in a spot of relatively small (\(<\)0.2 mm) size. Accordingly, with an increase in the average pump power, a significant temperature gradient is created in the Raman crystal, leading to strong thermo-optical distortions. These distortions comprise the main physical factor limiting an increase in the average power of such lasers. Such an increase can only be achieved using diamond crystals, which have a \(\sim\)1000 times higher thermal conductivity than other known Raman crystals [10]; however, their use in practice is limited, due to the high cost of diamonds, and the small size of the available crystals. Operating Raman lasers in pulse-burst mode allows another approach to Raman laser energy and power scaling. If the power of individual pulses (subpulses) in the burst is sufficient for efficient Raman conversion without tight focusing, then the temperature gradient and corresponding thermo-optical distortions in the Raman crystal can be considerably reduced. Considering, for simplicity, the generating volume as a cylinder with radial heat flow, and using a formula [11] for the thermal lens dioptric power \(\mathbf{f^{-1}}\):  
\[\mathbf{f^{-1}\sim P/d^{2}}\]  
(here, \(\mathbf{P}\) is a heat power, dissipated within a cylinder of diameter \(\mathbf{d}\)), one can estimate that an increase in the generating spot diameter from 0.2 mm to 4 mm should result in a \(\sim\)400-times reduction in the thermal lens power in the Raman crystal. This would allow a significant increase in the energy and average power of a Raman laser, even when using standard Raman crystals, such as potassium gadolinium tungstate (KGW). It should be noted that the largest burst energy previously realized in Raman lasers was 1.6 J at 1180 nm, which was obtained using a BaWO4 crystal pumped via a 2.5 ms burst of 50 Q-switched subpulses at 1062 nm, with a burst energy of 19 J from a Nd: GGG laser [4]. In this paper, we study the generation of high-energy bursts in the visible spectral range, using an external resonator Raman laser with a KGW crystal. The practical goal is to create an all-solid-state yellow-orange (585-595 nm) laser with an energy of at least 8 J, irradiated with \(10^{-2}\)-\(10^{-3}\) s bursts at a \(\sim\)1 Hz repetition rate, for application in dermatology and cosmetic medicine. So far, such high-level energy characteristics have only been achievable in flash-lamp-pumped organic dye lasers (model \"Vbeam\", manufactured by Candela.