Diode-pumped Q-switched Nd:YAG-KGW Raman laser operating in two-color modulation

Abstract

We report a diode-pumped Q-switched Nd:YAG-KGW Raman laser operating in two-color modulation. The output wavelength can be switched between 1159 nm and 1177 nm using an E-O switch, and the Raman output modulated in spectra-time domains was achieved. Raman pulse energy up to 114 mJ at 1177 nm and 98 mJ at 1159 nm were obtained respectively, corresponding to an overall Diode-Stokes conversion efficiency of 15.3% at 1177 nm and 13.2% at 1159 nm.

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.…”

Online Measurement of Internal Parameters in a Quasi-CW Diode-Pumped Nd:YAG Laser

“…All-solid-state neodymium doped yttrium aluminum garnet Nd:YAG lasers pumped by laser diodes (LDs) have been studied extensively for various applications, including material processing [1], nonlinear optics [2,3], lidars [4], the military domain [5,6], and medical surgery [7] due to their inherent advantages of a high output power, good beam quality, and high stability. The internal parameters of a laser, especially the small-signal gain, internal optical losses, and saturation parameter, and the optimization of a laser's output coupler are essential to the production, maintenance, and design of Nd:YAG laser systems.…”