小频差彩色干涉测量法
Chromatic interferometry with small frequency differences
摘要：
通过开发用于颜色擦除的“双晶体”方法，我们可以将彩色干涉测量的范围扩大到包括频率差落在400 nm至4500 nm波长范围之外的光子，该波长范围是PPLN晶体的通带。我们通过实验证明了这种可能性，通过观察在1064.4 nm和1063.6 nm处的源之间的干涉图案，对应于约200 GHz的频率差。
英文摘要：
By developing a `two-crystal' method for color erasure, we can broaden the scope of chromatic interferometry to include optical photons whose frequency difference falls outside of the 400 nm to 4500 nm wavelength range, which is the passband of a PPLN crystal. We demonstrate this possibility experimentally, by observing interference patterns between sources at 1064.4 nm and 1063.6 nm, corresponding to a frequency difference of about 200 GHz.
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