Precise Photon Correlation Measurement of a Chaotic Laser

TL;DR

This paper presents a highly precise measurement of the second order photon correlation function g^(2)(tau) for a chaotic laser using an advanced experimental technique, aligning well with theoretical predictions and enhancing quantum optics applications.

Contribution

It introduces a novel high-accuracy method for measuring photon correlations in chaotic lasers, improving precision over previous techniques.

Findings

g^(2)(tau) measured with less than 0.005 error within 50 ns

Confirmed bunching effect and coherence time of the chaotic laser

Method enhances accuracy of quantum statistical measurements

Abstract

The second order photon correlation g^(2)(tau) of a chaotic optical-feedback semiconductor laser is precisely measured using a Hanbury Brown-Twiss interferometer. The accurate g^(2)(tau) with non-zero delay time is obtained experimentally from the photon pair time interval distribution through a ninth-order self-convolution correction. The experimental results agree well with the theoretical analysis. The relative error of g^(2)(tau) is no more than 0.005 within 50 ns delay time. The bunching effect and coherence time of the chaotic laser are measured via the precise photon correlation technique. This technique provides a new tool to improve the accuracy of g^(2)(tau) measurement and boost applications of quantum statistics and correlation.