Diode array pumped kilowatt laser

High‐Power Laser Systems

“…High-energy solid-state lasers have been successfully used with liquid Freon SBS PCMs. [74] The SBS in Freon has a higher threshold and requires a longer working distance to achieve good reflectivity in the acoustic grating form. As a result, it can only work with a pulsed laser with a greater coherence length.…”

“…[72,73] The laser wavefront distortion caused by the thermal effect of the amplifier can be compensated to improve the laser beam quality by using phase conjugate mirror or adaptive optics. [74,75] A beam spot energy distribution before and after correction is illustrated in Figure 1g. [56] For high-power fiber amplifiers, the key to achieving high peak power lies in the suppression of nonlinear effects such as stimulated Raman scattering (SRS), stimulated Brillouin scattering (SBS), and transverse mode instability (TMI).…”

High-power Nd:YAG lasers using stable–unstable resonators

“…Furthermore, the height of the slab and the pumped region can be increased while maintaining constant pump density, thus providing simple scalability. This architecture has been successfully used by several authors in high average power (pulsed) solid-state laser designs [17][18][19]. In contrast to traditional implementations, we use the CPFS design as this reduces the width of the mode in the horizontal (stable) direction, which improves its dynamic stability and reduces problems associated with parasitic modes.…”

“…In practice, a weak vertical thermal lens that had a focal length of approximately 60 mm occurred. However, as discussed in section 3.2, the focal length of this lens can be controlled by using the heat bars, to heat the bottom and top surfaces of the slab [19]. Indium foil is used to provide thermal contact between the slab and the heat bars.…”

Two-stage optical parametric chirped-pulse amplifier using sub-nanosecond pump pulse generated by stimulated Brillouin scattering compression

“…[6][7][8][9][10] Stimulated Brillouin scattering (SBS) has been widely considered for different liquids, gases, and solids for improving the beam quality in high-power laser systems. [11][12][13][14][15][16][17] In addition, efficient SBS pulse compression has also been investigated theoretically and experimentally for various laser wavelengths. [18][19][20][21][22][23] This technique is very simple and applicable to high-brightness commercial lasers, such as the flash-lamp-pumped Q-switched Nd:YAG lasers.…”