损耗调制型掺铒光纤环形激光器混沌现象的实验研究

报道了损耗调制型掺铒光纤环形激光器中的混沌现象.在单频损耗调制型掺铒光纤环形激光器中，改变调制频率或调制电压，观察到倍周期分岔和阵发两种进入混沌途径的共存现象，与抽运调制型掺铒光纤环形激光器的实验结果相一致.提出了一种采用两个正弦信号驱动的损耗调制型掺铒光纤环形激光器，在调制信号频率比近似等于黄金分割数和白银分割数时，增加调制电压，发现激光器通过准周期途径进入混沌.当调制信号两频率比不同时，发生转变所需的调制电压也不同. 关键词： 掺铒光纤环形激光器 混沌 倍周期分岔 准周期

Experimental investigation on chaotic behaviors in loss-modulated erbium-doped fiber-ring lasers

Chaotic behaviors in loss-modulated erbium-doped fiber-ring lasers are reported. In a single-frequency loss-modulated erbium-doped fiber-ring laser, the coexistence of period-doubling bifurcation and intermittency routes to chaos is observed by changing the modulation frequency or the modulation voltage. The results are in agreement with those in an erbium-doped fiber-ring laser subjected to pump modulation. Dual-frequency loss-modulated erbium-doped fiber-ring lasers are proposed. When the value of the frequency ratio is approximately equal to the gold mean and the silver mean, respectively, the transition to chaos via quasiperiodicity is found when the modulation voltage is increased. The modulation voltages for the transition are different for the varied values of the frequency ratio.