Lenski Mathias, Heuermann Tobias, Wang Ziyao, Aleshire Christopher, Gaida Christian, Jáuregui César, Limpert Jens
Opt Lett. 2024 Jul 15;49(14):4042-4045. doi: 10.1364/OL.528330.
We report on a highly efficient, in-band pumped, Q-switched, Tm-doped, rod-type master oscillator power amplifier (MOPA) system delivering up to 140 W average output power and 7 mJ pulse energy with a slope efficiency of 77% at 20 kHz repetition rate. The amplifier is pumped with Raman-shifted fiber lasers centered at 1692 nm. This in-band pump scheme for Tm-doped fiber lasers can significantly mitigate their quantum defect-related heat load limitations. At the same time, this pump wavelength yields a similar amount of storable and extractable energy to the state-of-the-art pumping at 793 nm. This approach has allowed for the development of highly efficient Tm-doped fiber laser systems combining a high average power and a high output pulse energy.
我们报道了一种高效、带内泵浦、调Q、掺铥棒型主振荡功率放大器（MOPA）系统，在20kHz重复频率下，平均输出功率高达140W，脉冲能量为7mJ，斜率效率为77%。该放大器由中心波长为1692nm的拉曼频移光纤激光器泵浦。这种用于掺铥光纤激光器的带内泵浦方案可以显著减轻其与量子缺陷相关的热负载限制。同时，该泵浦波长产生的可存储和可提取能量与793nm的现有泵浦技术相当。这种方法有助于开发出兼具高平均功率和高输出脉冲能量的高效掺铥光纤激光系统。
