7 research outputs found
Quantum memory for squeezed light
We produce a 600-ns pulse of 1.86-dB squeezed vacuum at 795 nm in an optical
parametric amplifier and store it in a rubidium vapor cell for 1 us using
electromagnetically induced transparency. The recovered pulse, analyzed using
time-domain homodyne tomography, exhibits up to 0.21+-0.04 dB of squeezing. We
identify the factors leading to the degradation of squeezing and investigate
the phase evolution of the atomic coherence during the storage interval.Comment: To appear in PRL. Changes to version 3: we present a larger data set
featuring somewhat less squeezing, but also better statistics and a lower
margin of error. Some additional revisions are made in response to the
referees' comment
Propagation of Squeezed Vacuum under Electromagnetically Induced Transparency
We experimentally and theoretically analyze the transmission of
continuous-wave and pulsed squeezed vacuum through rubidium vapor under the
conditions of electromagnetically induced transparency. Frequency- and
time-domain homodyne tomography is used to measure the quadrature noise and
reconstruct the quantum states of the transmitted light. A simple theoretical
model explains the spectrum and degradation of the transmitted squeezing with
high precision
Hybrid optical and electronic laser locking using slow light due to spectral holes
We report on a narrow linewidth laser diode system that is stabilized using both optical and electronic feedback to a spectral hole in cryogenic Tm:YAG. The large group delay of the spectral hole leads to a laser with very low phase noise. The laser has proved useful for quantum optics and sensing applications involving cryogenic rare-earth-ion dopants.</p