Chromatic interferometry with small frequency differences

Luo Yuan Qu, Lu Chuan Liu, Jordan Cotler, Fei Ma, Jian Yu Guan, Ming Yang Zheng, Quan Yao, Xiuping Xie, Yu Ao Chen, Qiang Zhang, Frank Wilczek, Jian Wei Pan

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


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.

Original languageEnglish (US)
Pages (from-to)32294-32301
Number of pages8
JournalOptics Express
Issue number22
StatePublished - Oct 26 2020

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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