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Updated: Aug 7, 2026

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Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
Published on: May 30, 2014
Dispersion-independent high-visibility quantum interference in ultrafast parametric down-conversion
1Quantum Imaging Laboratory, Department of Physics, Boston University, 8 Saint Mary's Street, Boston, Massachusetts 02215, USA.
Physical Review Letters
|October 4, 2000
Abstract:
We demonstrate the effective removal of intrinsic distinguishability between entangled-photon pairs in femtosecond spontaneous parametric down-conversion. High-visibility quantum interference is recovered (an increase to 96% from 17%) while preserving the high photon-flux density associated with the use of long nonlinear crystals. This new technique is expected to serve as a basic component in the preparation of multiphoton entangled states.

