Low-frequency shift Raman spectroscopy using atomic filters

Xiaobo Xue, Corey Janisch, Yizhu Chen, Zhiwen Liu, Jingbiao Chen

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


A Faraday anomalous dispersion optical filter (FADOF) and an atomic resonant absorption filter are used in tandem to demonstrate a low-frequency shift Raman measurement down to few cm-1. The FADOF, with an ultralow bandwidth of 0.08 cm-1 at 780 nm, serves as a bandpass filter, while the rubidium atomic cell acts as a notch filter which has a bandwidth of 0.3 cm-1. A proof-of-concept study to measure a Raman signal generated from a silica optical fiber is performed, demonstrating a low-frequency measurement of both the Stokes and the anti-Stokes shift down to 3 cm-1 at an equivalent signal level. These results indicate the prospect for gigahertz-terahertz low-energy Raman spectroscopy based on atomic filters.

Original languageEnglish (US)
Pages (from-to)5397-5400
Number of pages4
JournalOptics Letters
Issue number22
StatePublished - Nov 15 2016

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics


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