Spectroscopy and LD end-pumped high power 2.79 μm CW laser from an Er:LuYSGG mixed crystal

Temperature distribution and the laser performance of LD end-pumped LuYSGG/Er:LuYSGG composite crystal

“…The horizontal and vertical M 2 factors were calculated to be 1.33 and 1.42, respectively, and the corresponding far-field divergence angles were 18.50 and 18.46 mrad, respectively. Both parameters were reduced compared with the M 2 factors of a single Er:LuYSGG crystal (1.78/1.83), 27 indicating that the bonding technique increases the laser output power and improves the beam quality due to the weakened thermal effect. The result suggests that the LD end-pumped LuYSGG/ Er:LuYSGG composite crystal with a high beam quality can be applied as a seed source in the MIR multi-stage amplification laser apparatus.…”

“…26 Dong et al achieved a maximum power of 909 mW and M 2 factors of 1.78/1.83 on the LD end-pumped Er:LuYSGG crystal. 27 However, for further improvement on the beam quality, the LD end-pumping was combined with thermal bonding technology on the Er:LuYSGG crystal. In addition, the Er:LuYSGG crystal has been proven to be an excellent radiation-resistant laser gain medium.…”

2.79 μm laser performance of a 968 nm LD side-pumped Er:LuYSGG mixed crystal

“…In recent years, Er:LuYSGG crystals have been investigated as an excellent potential mid-infrared laser material. 22,28 In our previous work, a maximum output power of 909 mW was obtained on the Er:LuYSGG crystal under 973 nm LD end-pumping. 28 However, to date, there is no report focusing on the LD side-pumped Er:LuYSGG crystal.…”

“…22,28 In our previous work, a maximum output power of 909 mW was obtained on the Er:LuYSGG crystal under 973 nm LD end-pumping. 28 However, to date, there is no report focusing on the LD side-pumped Er:LuYSGG crystal.…”

Laser performance of LD side-pumped Er: YSGG crystal rods with different diameters

“…2.7~3 µm mid-infrared (MIR) laser has been widely concerned due to its important application prospect in medical surgery, environmental monitoring, space military, and other fields [1][2][3]. Among a variety of ways to obtain MIR laser, laser diode (LD) pumped all-solid-state laser (ASSL) has the advantages of compact structure, stable performance, good beam quality, and high efficiency [4][5]. Currently, rare earth ions commonly used in MIR solid-state lasers are Er 3+ , Ho 3+ , and Dy 3+ [6][7][8].…”