Boitier Fabien, Godard Antoine, Ryasnyanskiy Aleksandr, Dubreuil Nicolas, Delaye Philippe, Fabre Claude, Rosencher Emmanuel
DMPH, Onera-the French Aerospace Laboratory, Palaiseau, France.
Opt Express. 2010 Sep 13;18(19):20401-8. doi: 10.1364/OE.18.020401.
We study the photon correlation properties of broadband parametric down-converted light. The measurement of the photon correlation is carried out thanks to a modified Hanbury Brown-Twiss interferometer based on two photon absorption in GaAs detector. Since this method is not affected by the phase matching conditions of the detecting apparatus (so called "final state post-selection"), the detection bandwidth can be extremely large. This is illustrated by studying, with the same apparatus, the degree of second order coherence of parametric light in both degenerate and non-degenerate cases. We show that our experiment is able to determine the coherent as well as the incoherent contributions to the degree of second order coherence of parametric light with a time resolution in the fs range scale.
我们研究了宽带参量下转换光的光子关联特性。借助基于砷化镓探测器中双光子吸收的改进型汉伯里·布朗 - 特威斯干涉仪对光子关联进行测量。由于该方法不受检测装置的相位匹配条件（即所谓的“末态后选择”）影响，检测带宽可以极大。通过使用同一装置研究简并和非简并情况下参量光的二阶相干度，对此进行了说明。我们表明，我们的实验能够在飞秒量级的时间分辨率下确定参量光二阶相干度中的相干和非相干贡献。
