论文标题
在单独来源之间的诱导相干实验中，对双光子波函数的频率相关要求
Frequency correlation requirements on the biphoton wavefunction in an induced coherence experiment between separate sources
论文作者
论文摘要
对于使用在单独的下接种源中生成的光束之间的相干性，用于成像，光谱，显微镜和光学相干断层扫描（OCT）的新应用。这些方案利用低参数增益制度中的连续波（CW）泵送，该方案在每个单个源中产生的信号形式对之间产生频率相关性和频率纠缠。但是，如果没有频率相关性，仍然可以观察到诱导的连贯性，因此双音波函数是可分解的吗？我们将证明情况就是这种情况，这可能是OCT应用程序的优势。高轴向分辨率需要大带宽。对于CW泵送，这需要使用短非线性晶体。这是有害的，因为短晶体会产生小光子通量。我们表明，即使对于产生较高光子通量的长晶体，超短泵脉冲的使用也可以改善轴向分辨率。
There is renewed interest in using the coherence between beams generated in separate down-converter sources for new applications in imaging, spectroscopy, microscopy and optical coherence tomography (OCT). These schemes make use of continuous wave (CW) pumping in the low parametric gain regime, which produces frequency correlations, and frequency entanglement, between signal-idler pairs generated in each single source. But can induced coherence still be observed if there is no frequency correlation, so the biphoton wavefunction is factorable? We will show that this is the case, and this might be an advantage for OCT applications. High axial resolution requires a large bandwidth. For CW pumping this requires the use of short nonlinear crystals. This is detrimental since short crystals generate small photon fluxes. We show that the use of ultrashort pump pulses allows improving axial resolution even for long crystal that produce higher photon fluxes.
