Chromatic interferometry with small frequency differences
arXiv:2009.08217 · doi:10.1364/OE.402560
Abstract
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.
arXiv comment5 pages, 3 figures
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