Stable mode sorting by two-dimensional parity of photonic transverse spatial states.

@article{Leary2009StableMS,
  title={Stable mode sorting by two-dimensional parity of photonic transverse spatial states.},
  author={C C Leary and Lydia Ashleigh Baumgardner and Michael G. Raymer},
  journal={Optics express},
  year={2009},
  volume={17 4},
  pages={2435-52}
}
We describe a mode sorter for two-dimensional parity of transverse spatial states of light based on an out-of-plane Sagnac interferometer. Both Hermite-Gauss (HG) and Laguerre-Gauss (LG) modes can be guided into one of two output ports according to the two-dimensional parity of the mode in question. Our interferometer sorts HG(nm) input modes depending upon whether they have even or odd order n+m; it equivalently sorts LG(l)(p) modes depending upon whether they have an even or odd value of… CONTINUE READING