Beat-note interferometer for direct phase measurement of photonic information

Yong Fan Chen, Yu Chen Liu, Zen Hsiang Tsai, Shih Hao Wang, Ite A. Yu

Research output: Contribution to journalArticlepeer-review

37 Citations (Scopus)


We describe a simple method of the beat-note interferometer that directly and dynamically measures the phase shift of light pulses induced by highly dispersive samples. Using the method, we show intuitively that the storage and retrieval of light pulses in a medium due to the effect of electromagnetically induced transparency is a coherent process and, quantitatively, that there is no observable phase shift caused by the process. This method is sensitive enough that it can be used to measure the phase of a light pulse with energy on the order of a dozen photons.

Original languageEnglish
Article number033812
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Issue number3
Publication statusPublished - 2005 Sept

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics


Dive into the research topics of 'Beat-note interferometer for direct phase measurement of photonic information'. Together they form a unique fingerprint.

Cite this