He Jing, Du Songtao, Wang Ziwei, Wang Zhaokun, Zhou Jun, Lou Qihong
Opt Express. 2013 Dec 2;21(24):29249-54. doi: 10.1364/OE.21.029249.
A linearly-polarized, high peak power, short-pulse, Q-switching Yb-doped large-mode-area photonic crystal fiber (PCF) oscillator with three-level system operation is demonstrated. By optimizing cavity parameters and adopting linear polarization component, the laser can easily obtain linearly-polarized output over 2 W at 978 nm with polarization extinction ratio (PER) up to 43 dB without any additional wavelength filter. Less than 50 ns stable output pulses are achieved within repetition range of 10 kHz-200 kHz and short pulse of 9 ns pulse duration, 130 kW peak power at 10 kHz can be reached. The characteristics and the key issues of the laser, such as interpulse ASE, spectrum ASE around 1030 nm, are with detailed discussion in the paper.
展示了一种具有三能级系统运行的线性偏振、高峰值功率、短脉冲、调Q掺镱大模面积光子晶体光纤（PCF）振荡器。通过优化腔参数并采用线性偏振组件，该激光器在978nm处无需任何额外波长滤波器即可轻松获得超过2W的线性偏振输出，偏振消光比（PER）高达43dB。在10kHz - 200kHz的重复频率范围内实现了小于50ns的稳定输出脉冲，在10kHz时可达到9ns脉冲持续时间、130kW峰值功率的短脉冲。本文详细讨论了该激光器的特性和关键问题，如脉冲间放大自发辐射（ASE）、1030nm附近的光谱ASE。
