主动锁模掺铒光纤环形激光器有理数谐波调制技术

1 4 6GHz ERBIUM DOPED FIBER LASER USING RATIONAL HARMONIC MODE LOCKING TECHNIQUE

成功地利用有理数谐波锁模技术在主动谐波锁模掺铒光纤环形激光器中获取数倍于调制频率ｆｍ的高重复率脉冲序列，所得最高锁模脉冲重复频率ｆｐ＝４ｆｍ≈６ＧＨｚ．根据实验结果，本文指出有理数谐波锁模输出高阶光脉冲的物理机制、导致高阶输出脉冲脉宽展宽和幅度不稳定的原因以及消除幅度不稳定的具体办法．

Abstract By means of the technique of rational harmonic mode locking(RHML),we succeeded in obtaining the optical pulses at repetition rate ( f p) being integer multiples of the RF drive frequency( f m≈1 4GHz)with detuning ratio of>10 -6 .The generation of maximum frequency was about 6GHz and the stable rational harmonic mode locking occurs only at f P=2 f m.According to the result of our experiments,we put forth a possible mechanism of using RHML to generate high bit zate pulses and point out the cause of the occurrence of instability in higher RHML.Furthermore,we demonstrate an effective method to elliminate the amplitude fluctuations of output pulse train.