The picture of the resonance peak while power changing

According to Aso-san's advice that the asymmetric may be caused by the laser power heat up the cavity when it nears to resonance leading to the increase of the cavity length, so it takes longer time to reach the maximum, I tried to see the resonance peak at different input power, the four pictures are took at laser power about: 2W, 1.5W, 1W and 0.5W.(When the laser power is 2W, the input power of the cavity is 820mW). It seems a little bit better with lower power.