The correlated spontaneous up conversion and down conversion photons exhibits a high beam brightness, small spatial divergence, and broad spectral tunability.
相关的自发参量上转换和下转换光子表现出光束亮度高、空间发散小以及在很宽频谱范围内可调谐等特点。
Spontaneous Parametric Down-conversion(SPDC); correlated photon; quantum-efficiency; coincidence count;
自发参量下转换； 相关光子； 量子效率； 符合计数；
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