Measuring the second order correlation function and the coherence time using random phase modulation
| Autor: | Yi-Wei Liu, Chen-How Huang, Yung-Hsiang Wen |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: |
Physics
Coherence time Photon business.industry Stray light FOS: Physical sciences 02 engineering and technology 01 natural sciences Measure (mathematics) Atomic and Molecular Physics and Optics Photon counting Correlation function (statistical mechanics) Interferometry 020210 optoelectronics & photonics Optics 0103 physical sciences 0202 electrical engineering electronic engineering information engineering 010306 general physics business Phase modulation Optics (physics.optics) Physics - Optics |
| Popis: | A new approach to measure the second order correlation function $g^{(2)}$ and the coherence time was investigated. The $g^{(2)}$ was calculated from the photon pair time interval distribution by direct numerical self-convolution with the high order correction. The accuracy of this method was examined using an optical fiber based Hanbury-Brown-Twiss interferometer with a pseudo-thermal light source. We found that the significance of the high order correction is related to the factor $\bar{I}\tau_{c}$, which is the overlapping of the photon wave packets. A novel technique was also demonstrated to measure the coherence time $\tau_c$ of a light source using the random phase modulation. In comparison with the conventional self-heterodyne detection, this method is more suitable for a weak light source with a long coherence time. Comment: 10 pages, 5 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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