一种新型主动锁模光纤激光器腔长稳定技术研究

A Novel Scheme for the Cavity Length Stability of Actively Mode-locked Fiber Laser

提出了一种全新的主动锁模光纤激光器的腔长稳定方案 ,通过波长的变化检测腔长的漂移 ,使用波长锁定器得到偏移误差信号补偿腔长变化 实验得到了脉宽为 7.6ps的近变换极限锁模脉冲 ,其超模抑制比达到 6 0dB ,并且在近 2h的工作时间内工作稳定 ,波长漂移小于 0 .0 1nm 与已有的方案相比较 ,不但输出脉冲质量高、并可长时间稳定工作 ,而且由于采用了低成本的稳定方案 。

A novel scheme is proposed for stabilizing actively mode-locked fiber lasers.Error signals are obtained for the scheme by detecting the cavity shift with a wavelength locker. The error signals are used for compensating for changes of the cavity length.A setup is established for realizing the proposed scheme.Pulse trains with a width of 7.6psareobtainedintheexperiments.Thesupermodesuppressionratioreaches60dBandanimprovementof35dB is made by adding stabilization devices.A wavelength shift is also measured,which is less than 0.01nm within 2 hours,and this value is about one sixties of that without adding stabilization devices. The results show that cavity length stability and noise suppression performance are much better than those published before. This scheme is simpler and more economical.