Directly stabilized solitons in silicon-nitride microresonators
  We investigate soliton generation dynamics with the influence of thermal effects. Either soliton annihilation or survival can occur in different trials with the same tuning method, and a spontaneous route to soliton formation is observed. 
Chengying Bao, Yi Xuan, Daniel E. Leaird, Minghao Qi, and Andrew M.   Weiner
physics.optics