10GHz可调谐主动锁模光纤激光器

SELF STABLE 10GHZ ACTIVELY MODE LOCKED FIBER RING LASER

主动锁模光纤激光器研制的难点在于克服不稳定性，本文提出解决其长期和短期不稳定的方法，分析了它们的工作原理，通过试验证明该两项技术使主动锁模光纤激光器实现了自稳定运转，在全部采用国产非保偏光纤的条件下稳定运行时间超过８ｈ，激光器重复频率为１０ＧＨｚ，脉宽１０ｐｓ，谱宽为０．３１７ｎｍ，时间带宽积为０．４０３，调谐范围为３９ｎｍ．

The actively mode locked fiber laser has two kinds of instability.It is proposed a novel method to overcome the short term instability by exploiting nonlinear polarization rotation.The long term instability is removed by feedback used to control fiber cavity length.It is made the actively mode locked fiber ring laser operation stabily for more than 8 times.The pulse width was 10ps,the spectrum width was 0.317nm,the product of time bandwidth was 0.403,wavelength was 1535～1564nm,the tunable range was 39nm.