Er3+-Yb3+共掺杂光纤环型腔被动谐波锁模激光器

 报道了Er³⁺-Yb³⁺共掺杂光纤作为增益介质的环型腔光纤激光器。利用光纤的非线性偏振旋转效应产生可饱和吸收体的锁模机制，通过调整泵浦功率，调节偏振控制器的状态，实现了连续基波锁模和高阶谐波锁模两种稳定的锁模运转状态。其中连续基波锁模重复频率15.89 MHz，中心波长为1.557 nm，光谱宽度为9.9 nm。二阶谐波锁模重复率为31.79 MHz，三阶谐波锁模脉冲重复率为46.99 MHz。观察到了调Q锁模和调Q脉冲序列，给出了各种运转状态的实验结果并对多种锁模机理作了简要的分析。

Er3+-Yb3+ codoped fiber ring cavity passive harmonically mode-locked laser

The paper demonstrated that by using the nonlinear polarization rotation as the mode-locking mechanism, the laser could operate stably in either CW fundamental wave mode-locked or high-order harmonically mode-locked regimes by changing the pump power and adjusting the polarization controller. Under the pump power of 10 mW, fundamental wave mode-locked pulses with repetition rate of 15.89 MHz, output spectrum width of 9.9 nm, central wavelength of 1.557 nm was obtained. Under a different pump power of 75 mW, we obtained second harmonically mode-locked pulses with repetition rate of 31.79 MHz and third harmonically mode-locked pulses with repetition rate of 46.68 MHz. The paper also presented some preliminary theoretical analyses.