Xu Yiqing, Coen Stéphane
Opt Lett. 2014 Jun 15;39(12):3492-5. doi: 10.1364/OL.39.003492.
We experimentally observe a spontaneous temporal symmetry breaking instability in a coherently driven passive optical Kerr resonator. Using a time-symmetric configuration, we report output pulses with strongly asymmetric temporal and spectral intensity profiles, with up to 71% of the energy on the same side of the pump center frequency. The instability occurs above a certain pump power threshold but remarkably vanishes above a second threshold, in excellent agreement with theory. We also observe a generalized bistability in which an asymmetric output state coexists with a symmetric one in the same pumping conditions.
我们通过实验观察到在相干驱动的无源光学克尔谐振器中存在自发的时间对称性破缺不稳定性。使用时间对称配置，我们报告了具有强烈不对称时间和光谱强度分布的输出脉冲，在泵浦中心频率同一侧的能量高达71%。这种不稳定性在一定的泵浦功率阈值以上出现，但在高于第二个阈值时显著消失，这与理论非常吻合。我们还观察到一种广义双稳性，即在相同的泵浦条件下，不对称输出状态与对称输出状态共存。
