5 research outputs found
Experimental generation of multi-photon Fock states
We experimentally demonstrate the generation of multi-photon Fock states with
up to three photons in well-defined spatial-temporal modes synchronized with a
classical clock. The states are characterized using quantum optical homodyne
tomography to ensure mode selectivity. The three-photon Fock states are
probabilistically generated by pulsed spontaneous parametric down conversion at
a rate of one per second, enabling complete characterization in 12 hours.Comment: 9 pages, 5 figure
High-stability time-domain balanced homodyne detector for ultrafast optical pulse applications
Low-noise, efficient, phase-sensitive time-domain optical detection is
essential for foundational tests of quantum physics based on optical quantum
states and the realization of numerous applications ranging from quantum key
distribution to coherent classical telecommunications. Stability, bandwidth,
efficiency, and signal-to-noise ratio are crucial performance parameters for
effective detector operation. Here we present a high-bandwidth, low-noise,
ultra-stable time-domain coherent measurement scheme based on balanced homodyne
detection ideally suited to characterization of quantum and classical light
fields in well-defined ultrashort optical pulse modes.Comment: 6 pages, 4 figure
Hybrid squeezing of solitonic resonant radiation in photonic crystal fibers
We report on the existence of a novel kind of squeezing in photonic crystal
fibers which is conceptually intermediate between the four-wave mixing induced
squeezing, in which all the participant waves are monochromatic waves, and the
self-phase modulation induced squeezing for a single pulse in a coherent state.
This hybrid squeezing occurs when an arbitrary short soliton emits
quasi-monochromatic resonant radiation near a zero group velocity dispersion
point of the fiber. Photons around the resonant frequency become strongly
correlated due to the presence of the classical soliton, and a reduction of the
quantum noise below the shot noise level is predicted.Comment: 5 pages, 2 figure