Related Experiment Video
Updated: Jun 13, 2026
A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
Published on: September 5, 2019
High-quality fiber-optic polarization entanglement distribution at 1.3 microm telecom wavelength
Tian Zhong1, Xiaolong Hu, Franco N C Wong
1Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA. tzhong@mit.edu
Abstract:
We demonstrate high-quality distribution of 1.3 microm polarization-entangled photons generated from a fiber-coupled periodically poled KTiOPO(4) waveguide over 200 m fiber-optic cables. Time-multiplexed measurements with a 19% efficient superconducting nanowire single-photon detector at the remote location show a detected flux of 5.8 pairs/s at a pump power of 25 microW and an average two-photon quantum-interference visibility of 97.7% without subtraction of accidentals.
