Group and phase velocity coupling of colliding pulses in a nanostructure.

@article{Luo2011GroupAP,
  title={Group and phase velocity coupling of colliding pulses in a nanostructure.},
  author={Xuan Luo and Ladan Arissian and Koji Masuda and Jean-Claude Diels},
  journal={Optics letters},
  year={2011},
  volume={36 19},
  pages={3885-7}
}
It is generally accepted that, in a laser cavity, the group delay--responsible for the round trip time--and the phase delay both have a linear dependence on the cavity length. We show that nanostructures, such as quantum wells, can create a coupling between phase and group velocities, resulting in a periodic dependence of the repetition rate on the laser cavity length.