新一代高功率固体激光装置前端系统大多采用了先进的全光纤全固化技术路线，为了实现单模光纤系统长期稳定输出，需要对系统中的偏振态有针对性地进行控制。提出一种主动偏振控制实现单模光纤系统低重复频率窄脉冲偏振稳定的方法。利用该技术开发的脉冲稳偏器在重复频率大于100 Hz，脉冲宽度大于1.5 ns的情况下，系统输出稳定性可控制在均方根(RMS)为1%和峰谷值(PV)为7%左右。所开发的脉冲稳偏器成功应用于我国第二代高功率固体激光装置前端系统中，输出稳定性指标优于国家点火装置(NIF)。该技术可广泛应用于窄脉冲和低重复频率系统中实现偏振态的主动控制。

The all-fiber and all-solidified technique was installed to the front end of the next generation high power laser system. Appropriate control to the polarization was required to maintain the stabilization of the fiber system. In order to maintain low repetition narrow band pulses′ polarization stabilization, a novel active control technique applied to single mode fiber laser system which worked with low repetition narrow band pulses was proposed. A root-mean-square of 1% and a peak to valley ratio of 7% stability were achieved, when the pulse polarization stabilizer based on this novel technique was used to 1.5 ns pulses at repetition above 100 Hz. The new polarization stabilizer was applied to fiber front end of the second generation high power laser system. The performance index was better than national ignition facility (NIF), and this technique could be used to control the polarization of the narrow-band and low-repetition system actively.