Wave Chaos in Rotating Optical Cavities
  It is shown that, even when the eigenmodes of an optical cavity are wave-chaotic, the frequency splitting due to the rotation of the cavity occurs and the frequency difference is proportional to the angular velocity although the splitting eigenmodes are still wave-chaotic and do not correspond to any unidirectionally-rotating waves. 
Takahisa Harayama, Satoshi Sunada, and Tomohiro Miyasaka