Abstract

The measurement of the second-order degree of coherence [g⁽²⁾(τ)] is one of the important methods used to study the dynamical evolution of photon-matter interaction systems. Here, we use a nitrogen-vacancy center in a diamond to compare the measurement of g⁽²⁾(τ) with two methods. One is the prototype measurement process with a tunable delay. The other is a start-stop process based on the time-to-amplitude conversion (TAC) and multichannel analyzer (MCA) system, which is usually applied to achieve efficient measurements. The divergence in the measurement results is observed when the delay time is comparable with the mean interval time between two neighboring detected photons. Moreover, a correction function is presented to correct the results from the TAC-MCA system to the genuine g⁽²⁾(τ). Such a correction method will provide a way to study the dynamics in photonic systems for quantum information techniques.

© 2016 Chinese Laser Press

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