Slow-light fourier transform interferometer

Zhimin Shi*, Robert W. Boyd, Ryan M. Camacho, Praveen K. Vudyasetu, John C. Howell

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

122 Scopus citations


We describe a new type of Fourier transform (FT) interferometer in which the tunable optical delay between the two arms is realized by using a continuously variable slow-light medium instead of a moving arm as in a conventional setup. The spectral resolution of such a FT interferometer exceeds that of a conventional setup of comparable size by a factor equal to the maximum group index of the slow-light medium. The scheme is experimentally demonstrated by using a rubidium atomic vapor cell as the tunable slow-light medium, and the spectral resolution is enhanced by a factor of approximately 100.

Original languageAmerican English
Article number240801
JournalPhysical Review Letters
Issue number24
StatePublished - 11 Dec 2007
Externally publishedYes


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