Shi Yang, Gao Chunqing, Wang Shuo, Li Shanghua, Song Rui, Zhang Meng, Gao Mingwei, Wang Qing
Opt Express. 2019 Feb 4;27(3):2671-2680. doi: 10.1364/OE.27.002671.
A high-energy, single-frequency, injection-seeded, Q-switched Er:YAG laser oscillating at 1645 nm is demonstrated. For obtaining high output energy, a double-crystals-end-pumping architecture is utilized. The maximum output energies of single-frequency pulses are 12.84 mJ, 16.87 mJ, and 20.3 mJ at pulse repetition rates of 500 Hz, 300 Hz and 200 Hz, respectively. Correspondingly, the pulse widths are 162 ns, 125 ns, and 110 ns, respectively. The half-width of the pulse spectrum at the pulse repetition rate of 200 Hz is 4.59 MHz, measured by using the heterodyne technique, which is 1.14 times transform limited. To the best of our knowledge, 20.3 mJ is the highest energy obtained from a single-frequency, injection-seeded Er:YAG laser.
展示了一种在1645nm波长振荡的高能量、单频、注入种子、调Q的铒钇铝石榴石（Er:YAG）激光器。为了获得高输出能量，采用了双晶体端面泵浦结构。在500Hz、300Hz和200Hz的脉冲重复频率下，单频脉冲的最大输出能量分别为12.84mJ、16.87mJ和20.3mJ。相应地，脉冲宽度分别为162ns、125ns和110ns。通过外差技术测量，在200Hz脉冲重复频率下脉冲光谱的半高宽为4.59MHz，是变换极限的1.14倍。据我们所知，20.3mJ是从单频、注入种子的Er:YAG激光器获得的最高能量。
