Modelocking can be induced not only by loss modulation, but also by phase modulation.
锁模不仅可用损耗调制取得，也可用位相调制来得到。
2
Press ESC to cancel lockingmode and double check that the phase display stands still when the tuning fork is struck.
按esc退出锁定模式，并且再次确认相位显示中的方块是在音叉持续发声时停止移动的。
3
The effects of phase bias and group velocity dispersion on modelocking mechanism are analyzed. The operating conditions for stable short pulse generation are obtained.