激光原型装置光纤前端系统偏振稳定控制技术
Polarization stabilization of all fiber frontend system for laser facility prototype
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摘要: 分析了激光原型装置光纤前端系统的偏振特性，针对激光原型装置光纤前端系统窄光谱、短脉冲的特点以及该原型装置对光纤前端系统输出偏振态的要求，提出了一种稳定光纤前端系统输出偏振态的新方法。采用脉冲方式偏置光纤前端系统的幅度调制器，通过光纤偏振稳定装置在线检测幅度调制器泄漏连续激光的偏振态进行自动调整，实现了光纤前端系统偏振态的自动稳偏，解决了波导幅度调制器长时间工作后消光比下降的问题。光纤前端系统长时间工作输出的稳定度达到了2.9％。Abstract: The polarization characeristics of the all fiber front-end for a laser facility prototype were analyzed. According to the polarization control demand of the laser facility prototype, a new method was developed to stablize the polarization of the fiber system with narrow bandwidth and short-pulse output. The amplitude modulator of the fiber system was pulse-biased and the autostabilizaion of the fiber system polarization was obtained by on-line detecting the polarization state of CW laser leakage from the amplitude modulaor. The decrease of the extinction ratio of the amplitude modulator in longtime operation was restrained and the stability of the all fiber frontend system was improved to 2.9%．
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Key words:
- icf /
- front-end /
- all fiber system /
- polarization control /
- stability
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