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Quantum Zeno blockade offers a distinct approach to signal manipulation and logic operations in a counterintuitive “interaction-free” implementation. Previous experimental studies have used nonlinear waveguides and optical cavities, both in bulk-optics settings. We report the observation of quantum Zeno blockade in a chip-integrable platform, whose results point to all-optical information processing...
We analyze an efficient quantum-communications architecture over telecom fibers using overlapping time-frequency modes and optimal receivers based on nonlinear processing.
We show that spatiotemporally overlapping quantum photonic signals in orthogonal time-frequency modes can be discriminated via quantum frequency conversion during a single passage through a waveguide.
Photon pairs sources based on nonlinear optical techniques are essential components in modern quantum optical systems. We present here a naturally occurring biological source of photon pairs—Green Fluorescent Protein (GFP)—obtained by a non-degenerate four-wave mixing (FWM).
The time-shift control (TSC) technique for voltage regulator module (VRM) is proposed to achieve high performance power supply for servers in cloud computing. Four power stages are adopted to provide high current driving capability and low output ripple. Besides, the power request, which includes the number of active phases and voltage identification (VID), is acknowledged by servers for high driving...
We present the measurement of χ(3) nonlinearity of Green Fluorescent Protein. The nonlinear index is n2 = 10−19m2/W, opening the possibility of using genetically engineerable and naturally occuring proteins in cells as a source of four wave mixing experiments.
We report observing all-optical modulation with a contrast of 80% via quantum Zeno blockade in a Lithium Niobate whispering-gallery-mode resonator at a pump peak power of 100μW.
We present a fiber-based multichannel source of correlated photon pairs in the telecommunication O-band. Coincidence-to-accidental ratios >100 (≃1) are measured between the paired (unpaired) signal-idler channels.
We demonstrate a quantum optical Fredkin gate in an all-fiber setup, which is self-stabilizing against pump fluctuations owing to stimulated Raman scattering occurring naturally in such a system.
In this paper, two flexible fabric antennas in UHF band are chosen to study the effect of three sewing types on performances of embroidery antennas. A meandered sleeve monopole antenna is embroidered into a jean cotton substrate with Fill stitch and Spiral stitch respectively. From measured return loss and received power, the antenna with Spiral stitch shows better performances. In the same way, a...
We present our recent development of fiber-optic technology for all-optical switching and routing of entangled photons at high speeds, with minimal loss and added in-band noise, and—most importantly—without disturbing the photons' quantum state.
A low cross-polarization stacked slot antenna backed by a cavity is presented. Due to the combination of stacked structure and substrate integrated waveguide technology, the bandwidth is enhanced and the parallel plate modes are suppressed. Measurements showed that a standalone antenna can achieve 22.5% fractional bandwidth and 89% radiation efficiency. Meanwhile, the use of an end stripline feed...
We will present progress in ultrafast all-optical quantum switching. χ(3)-based devices can route entangled photons without disturbing their quantum state, whereas χ(2)-based devices can, in principle, lead to dissipation-free quantum-optical Fredkin gates.
We present recent progress in all-optical routing of entangled single photons at high speeds, with minimal loss and added in-band noise, and — most importantly — without disturbing the photons' quantum state.
Aiming at the issue of slow operating speed, low real-time character and unsuitability on looking for the source of the harmonic which is the traditional power quality monitor system based on single chip Microprocessor (SCM), this paper designs a new one based on DSP. Analyzing from the hardware and software designed, it present the principle of clamp type Hall sensor and adopts the improved fast...
A single controller current balance (SCCB) technique is proposed to achieve the time-multiplexing current balance in voltage-mode multi-phase DC-DC buck converter with only one modulation controller. Thus, the N-1 controllers can be removed when the SCCB technique is implemented in the monolithic N-phase DC-DC buck converters for largely decreasing the silicon area and power consumption. In addition,...
We model fiber parametric entangled photon sources for use in quantum key distribution applications. Effects of Raman scattered photons are evaluated and are found to be manageable when appropriately detuned optical filters are employed.
In this paper, the use and the effect of magneto-dielectric materials in two antenna structures, namely waveguide antenna and coaxial antenna, is discussed. For different values of the permeability and permittivity of the material, the effect of the material on the wave impedance and the return loss performance of waveguide and coaxial antennas are compared. It was shown that the material loading...
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