A versatile waveguide source of photon pairs for chip-scale quantum information processing

Opt Express. 2009 Apr 13;17(8):6727-40. doi: 10.1364/oe.17.006727.


We demonstrate a bright, bandwidth-tunable, quasi-phase-matched single-waveguide source generating photon pairs near 900 nm and 1300 nm. Two-photon coincidence spectra are measured at a range of operating temperatures of a periodically-poled KTiOPO(4) (PPKTP) waveguide, which supports both type-0 and type-II spontaneous parametric down-conversion. We map out relative contributions of two-photon to one-photon fluorescence for a range of operating parameters. Such a versatile device is highly promising for future chip-scale quantum information processing.

Publication types

  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Computer-Aided Design
  • Equipment Design
  • Equipment Failure Analysis
  • Light
  • Lighting / instrumentation*
  • Photons
  • Quantum Theory
  • Refractometry / instrumentation*
  • Reproducibility of Results
  • Scattering, Radiation
  • Sensitivity and Specificity
  • Signal Processing, Computer-Assisted / instrumentation*
  • Telecommunications / instrumentation*