Kim J W, Mackenzie J I, Hayes J R, Clarkson W A
Optoelectronics Research Center, University of Southampton, Southampton SO17 1BJ, UK.
Opt Express. 2011 Jul 18;19(15):14526-31. doi: 10.1364/OE.19.014526.
A simple method for conditioning the pump beam in an end-pumped solid-state laser to allow direct excitation of the first order Laguerre-Gaussian doughnut (LG01) mode is reported. This approach has been applied to a hybrid (fiber-laser-pumped) Er:YAG laser yielding 13.1 W of continuous-wave output at 1645 nm in a radially-polarized LG01 doughnut beam with beam propagation factor (M(2)) < 2.4 for 34 W of incident pump power at 1532 nm. The corresponding slope efficiency with respect to incident pump power was 48%. The prospects of further power scaling and improved laser performance are discussed.
报道了一种用于调节端面泵浦固态激光器中泵浦光束的简单方法，以实现对一阶拉盖尔 - 高斯环形（LG01）模式的直接激发。该方法已应用于一台混合（光纤激光泵浦）的铒钇铝石榴石（Er:YAG）激光器，在1532 nm处34 W的入射泵浦功率下，在径向偏振的LG01环形光束中产生1645 nm的13.1 W连续波输出，光束传输因子（M²）< 2.4。相对于入射泵浦功率的相应斜率效率为48%。还讨论了进一步提高功率和改善激光性能的前景。
