Photon statistics measurement by use of single photon detection |
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Authors: | Email author" target="_blank">Liantuan?XiaoEmail author Yuqiang?Jiang Yanting?Zhao Wangbao?Yin Jianming?Zhao Suotang?Jia |
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Institution: | XIAO Liantuan, JIANG Yuqiang, ZHAO Yanting, YIN Wangbao, ZHAO Jianming & JIA Suotang State Key Laboratory of Quantum Optics and Quantum Optics Devices, College of Physics and Electronic Engineering, Shanxi University, Tai-yuan 030006, China |
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Abstract: | The direct measurement of the Mandel para- meter of weak laser pulses, with 10 ns pulse duration time and the mean number of photon per pulsenbeing approxi-mately 0.1, is investigated by recording every photocount event. With the Hanbury Brown and Twiss detection scheme, and not more than one photon per pulse being detected dur-ing the sample time by single-photon counters, we have found that the single mode diode laser with driving current lower than the threshold yields a sub-Poissonian statistics. In addition, when the diode laser driving current is much higher than the threshold, it is validated that the Mandel parameter QC of the Poissonian coherent state is nearly -/2.nThe experimental results are in good agreement with theoretical prediction considering the measurement error. |
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Keywords: | photon statistics Mandel parameter dead time sin-gle-photon counter Poisson distribution |
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