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arXiv:2310.10377 · Physical Review A

Direct measurement of the coherent light proportion from a practical laser source

Xi Jie Yeo, Eva Ernst, Alvin Leow, Jaesuk Hwang, Lijiong Shen, Christian Kurtsiefer, Peng Kian Tan

Published Jan 12, 2024• 2 citations
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Abstract

We present a technique to estimate the proportion of coherent emission in the light emitted by a practical laser source without spectral filtering. The technique is based on measuring interferometric photon correlations between the output ports of an asymmetric Mach-Zehnder interferometer. With this, we characterize the fraction of coherent emission in the light emitted by a laser diode when transiting through the lasing threshold.

DOI
10.1103/physreva.109.013706

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