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In-fiber frequency-domain measurement of ultrashort second-order correlations of incoherent light

机译:非相干光的超短二阶相关性的光纤频域测量

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摘要

The second-order correlation function of incoherent light, which is usually measured in the time domain, can be alternatively measured in the frequency domain. Here, we use an all-optical technique in a highly nonlinear fiber for measuring the full spectrum of the fluctuations of the photocurrent (rf spectrum) generated by broadband radiation with different spectral coherence properties. Our experiments reveal that the rf spectrum of a light signal depends strongly on its spectral coherence properties. From a practical perspective, this ultrafast technique constitutes an alternative for measuring the intensity correlations of spectrally incoherent radiation.
机译:通常在时域中测量的非相干光的二阶相关函数可以在频域中测量。在这里,我们在高度非线性的光纤中使用全光学技术,以测量由具有不同光谱相干特性的宽带辐射产生的光电流波动的全光谱(rf光谱)。我们的实验表明,光信号的射频光谱在很大程度上取决于其光谱相干特性。从实际的角度来看,这种超快技术是测量光谱非相干辐射强度相关性的替代方法。

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