Abstract
We have generated a new type of biphoton state by cavity-enhanced down-conversion in a type-II phase-matched, periodically poled crystal. By introducing a weak intracavity birefringence, we obtained signal and idler photons whose quantum interference was modulated between singlet and triplet signatures according to their arrival-time difference. This cavity-enhanced biphoton source is spectrally bright, yielding a single-mode fiber-coupled coincidence rate of per mW of pump power per MHz of down-conversion bandwidth.
- Received 19 April 2006
DOI:https://doi.org/10.1103/PhysRevLett.97.223601
©2006 American Physical Society