We demonstrate a master oscillator power amplifier system that emits single-frequency, high-energy optical pulses at 1539 nm using an Er, Yb:glass planar waveguide amplifier with a normalized frequency of the waveguide of 4.4. A maximum pulse energy of 9.7 mJ is observed at a repetition frequency of 500 Hz. The signal to noise ratio is 25 dB and is independent of the repetition frequency from 100 to 500 Hz. The beam quality factor M² of the output is 1.03 thanks to the small normalized frequency of the planar waveguide.

中文翻译：

---

来自 Er:Yb 玻璃平面波导放大器的单频高能脉冲，具有良好的光束质量

我们演示了一个主振荡器功率放大器系统，该系统使用 Er、Yb: 玻璃平面波导放大器发射 1539 nm 的单频高能光脉冲，波导的归一化频率为 4.4。在 500 Hz 的重复频率下观察到的最大脉冲能量为 9.7 mJ。信噪比为 25 dB，与 100 至 500 Hz 的重复频率无关。由于平面波导的归一化频率较小，输出的光束质量因数 M ^{2为 1.03。}