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Updated: Jun 10, 2026

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Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
Published on: November 30, 2012
Femtowatt-light-level phase measurement of slow light pulses via beat-note interferometer
Hsiang-Yu Lo1, Po-Ching Su, Yu-Wei Cheng
1Department of Physics, National Cheng Kung University, Tainan 701, Taiwan.
Optics Express
|August 20, 2010
Abstract:
We report on an experimental demonstration of applying the beat-note interferometer to simultaneously measure the phase and amplitude variations of light pulses after propagating through an electromagnetically induced transparency medium at femtowatt-light levels. Furthermore, we observe that the measured phase noise approaches the shot-noise level arising from the fluctuations of detected photons.

