Efficient high-output diode side-pumped electro-optical Q-switched Nd:YAG/KGd(WO₄)₂Raman laser with conductive and air cooling

Abstract

Abstract:We report an efficient high-output periodically diode side-pumped electro-optical (EO) Q-switched Nd:YAG/KGd(WO 4 ) 2 coupled-cavity Raman laser with conductive and air cooling. A maximum pulse energy of 126 mJ and a peak power of 21 MW are achieved at the first order Stokes wavelength of 1177 nm under the diodes energy of 694 mJ, corresponding to an overall Diode-Stokes conversion efficiency of 18.2%, a slope efficiency of 28.8%, and a fundamental-Stokes coupling efficiency of 51.6%. Diode-Stokes overall optical efficiency, diode-Stokes slope efficiency, and fundamental-Stokes coupling efficiency with respect to incident pump energy at 808 nm

Kilohertz high power extracavity KGW yellow raman lasers based on pulse LD side-pumped ceramic Nd: YAG

“…Raman yellow lasers near 577 nm wavelength based on the Stimulated Raman scattering (SRS) have many advantages including low cost, high beam quality, small volume, etc. [2][3][4][5][6][7], and they have become the preferred laser source of used in photodynamic ther apy for cutaneous hemangioma and micro venous malformations. To achieve required yellow sources, a variety of approaches have been explored in recent years.…”

LD-pumped Nd:GdVO4 Raman laser at 1166 nm with LiIO3 crystal

“…In the past few years, the SRS lasers rapidly developed, many crystals such as Ba(NO 3 ) 2 [1], BaWO 4 [2,3], SrWO 4 [4][5][6], KGd(WO 4 ) 2 [7,8], and KLu(WO 4 ) 2 [9] have been widely used in Raman lasers to generate new wavelength lights, which have been proved to be efficient and reliable Raman crystals.…”

Thermo-Optic Numerical Research on Segmented Circular LD Arrays Side-Pumping a Nd:YAG Laser Rod

“…Finally, the heat is removed by the segmented holders. This scheme reduces the thermal lensing caused by the radial temperature gradient and has been demonstrated in applications of Q-switched neodymium-doped yttrium aluminum garnet (Nd:YAG) [10] and Raman [11,12] lasers. However, no detailed comparative research has yet been conducted on the temperature distributions and thermo-optic effects in laser rods between this scheme and the other side-pumping schemes under the same cooling boundary conditions.…”