Olivier Michel, Gagnon Marc-Daniel, Piché Michel
Opt Express. 2015 Mar 9;23(5):6738-46. doi: 10.1364/OE.23.006738.
A strategy to align a mode-locked fiber laser with nonlinear polarization rotation is presented. This strategy is based on measurements of the output polarization state. It is shown that, as the angle of a motorized polarization controller inside the cavity is swept, the laser eventually reaches a mode-locked regime and the values of the Stokes parameters undergo an abrupt change. The sensing of this sudden variation is thus used to detect the mode-locking condition and a feedback mechanism drives the alignment of the polarization controller to force mode locking.
提出了一种用于锁模光纤激光器与非线性偏振旋转对准的策略。该策略基于对输出偏振态的测量。结果表明，随着腔内电动偏振控制器的角度扫描，激光器最终达到锁模状态，斯托克斯参数的值会发生突变。因此，利用对这种突然变化的传感来检测锁模状态，并且反馈机制驱动偏振控制器的对准以强制实现锁模。
