Majidof Mohammad Mahdi, Latifi Hamid, Tanhaee Ehsan, Nabavi Seyed Hassan
Opt Express. 2020 May 11;28(10):15207-15220. doi: 10.1364/OE.383483.
This work experimentally introduces a new single-crystal Nd:YAG end-pumped zigzag slab (EPZS) gain module based on a thin polytetrafluoroethylene (PTFE) sheet as a total internal reflection (TIR) protection layer. In this gain module, a specific optical pump-beam delivery (OPBD) system is used to improve the output beam quality (BQ) of the slab amplifier from 9.4 in a typical OPBD system to 4.7 with the total pump power of 2400 W. The average logarithmic small-signal gain (g0l) in the 0.06% Nd:YAG EPZS gain module at the laser beam incident angle of 7.1° was obtained around 0.64 for the two OPBD systems mentioned above.
这项工作通过实验引入了一种新型的基于薄聚四氟乙烯（PTFE）片作为全内反射（TIR）保护层的单晶钕：钇铝石榴石端面泵浦之字形板条（EPZS）增益模块。在该增益模块中，采用了一种特定的光泵浦光束传输（OPBD）系统，将板条放大器的输出光束质量（BQ）从典型OPBD系统中的9.4提高到了4.7，总泵浦功率为2400W。对于上述两种OPBD系统，在激光束入射角为7.1°时，0.06%钕：钇铝石榴石EPZS增益模块中的平均对数小信号增益（g0l）约为0.64。
