Open AccessFemtowatt-light-level phase measurement of slow light pulses via beat-note interferometer
Author(s) -
Hsiang Yu Lo,
Po Ching Su,
Yuanna Cheng,
Pin I. Wu,
Yong Fan Chen
Publication year - 2010
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.18.018498
Subject(s) - optics , interferometry , physics , beat (acoustics) , amplitude , electromagnetically induced transparency , phase (matter) , phase noise , photon , quantum mechanics
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.