title: Femtowatt-light-level phase measurement of slow light pulses via beat-note interferometer.
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.
authors: Department of Physics, National Cheng Kung University, Tainan 701, Taiwan.
authors: Hsiang-Yu
authors: HY
authors: Lo
authors: Po-Ching
authors: PC
authors: Su
authors: Yu-Wei
authors: YW
authors: Cheng
authors: Pin-I
authors: PI
authors: Wu
authors: Yong-Fan
authors: YF
authors: Chen
mesh_terms: D000162:Acoustics / Q000295:instrumentation*; D004867:Equipment Design; D007368:Interferometry / Q000295:instrumentation* / Q000379:methods*; D007834:Lasers; D008027:Light; D008962:Models, Theoretical; D055100:Optical Fibers; D017785:Photons