Abstract The sputtering of UF4 targets by energetic beams 16O, 19F, and 35Cl ions has been investigated for beam energies in the range 0.12 to 1.5 MeV/amu. yields, which follow same trend as electronic part projectile energy loss material, are observed have a strong dependence on charge state incident ions. Data taken both transmission reflection (0° 180° direction, respectively). Energy spectra neutral sputtered particles obtained 5 MeV 19F 13 ions; cases spectrum Maxwellian form. data...

Si nanocone arrays are formed on Si(100) by Ar(+) ion sputtering combined with metal co-deposition. The aspect ratio of cone is found to increases steadily increasing sample temperature, but decreases slowly dose. Furthermore, the height and base diameter increase monotonously dose at a constant temperature. absorptivity in general height. A close unity all-solar-spectrum absorption nanostructured finally achieved, absorbance for λ = 350 1100 nm being higher than 96%, that 2000 92%....

We report in this work the first all-optical wavelength conversion (AOWC) of a mode division multiplexed (MDM) superchannel consisting 2N modes by dividing into N single-mode (SM) tributaries, converting SM signals using well developed SM-AOWC techniques, and finally combining tributaries back to an MDM at converted wavelength, inspired idea filtering techniques filter multimode astronomy. The conversions between are realized 3D laser-writing photonic lanterns SM-AOWCs based on polarization...

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We propose and experimentally demonstrate two independent component analysis (ICA) based channel equalizers (CEs) for 6 × MIMO-OFDM transmission over few-mode fiber. Compared with the conventional equalizer on training symbols (TSs-CE), proposed ICA-based (ICA-CE-I ICA-CE-II) can achieve comparable performances, while requiring much less symbols. Consequently, overheads equalization be substantially reduced from 13.7% to 0.4% 2.6%, respectively. Meanwhile, we also investigate convergence...

Objective: This study aimed to evaluate the television (TV) viewing and computer mobile phone usage duration in a community sample of Chinese adults examine their associations with BMI obesity. Methods: We conducted community-based health needs assessment from February December 2018 among 2,873 Nanshan District Shenzhen, China. used self-administered questionnaires collect data 24 service centers District. The participants individually recorded time they spent watching TV using computers...

We experimentally demonstrate on-chip mode-selective wavelength conversions based on the degenerate four-wave mixing (FWM) nonlinear effect in a few-mode silicon waveguide. A multimode waveguide with tapered directional coupler mode (de)multiplexers is designed and fabricated. Using signals advanced modulation formats all-optical of 102.6-Gb/s OFDM-QPSK are verified. Experimental results show that only small optical signal-to-noise ratio (OSNR) penalties observed after conversion both modes,...

We experimentally demonstrate a sub-band wavelength conversion scheme based on four-wave mixing in high-nonlinear fiber for multiple Tb/s-class superchannel coherent optical orthogonal frequency-division multiplexing networks. Combined with the selective switches reconfigurable add/drop multiplexers, overlapped spectra are efficiently relocated and almost seamlessly formed into new very little spectral efficiency degradation.

We experimentally demonstrate on-chip dual-channel all-optical AND logic operations based on four-wave mixing (FWM) for on-off keying (OOK) signals in a multimode silicon waveguide. A two-mode (de)multiplexing circuit consisting of tapered directional coupler-based (de)multiplexers and waveguide is designed fabricated this application. Experimental results show open eye-diagrams confirm the with moderate power penalties both modes.

This work focuses on the crystal size dependence of photoactive materials and light absorption enhancement addition carbon dots (CDs). mac-FTO (macroporous fluorine-doped tin oxide) films with an inverse opal structure are exploited to supply enhanced load sites induce morphology control for embedded materials. The Bi2WO6@mac-FTO photoelectrode is prepared directly inside a film using simple in situ synthesis method, application CDs achieved through impregnation assembly manipulation...

From 2010 to 2015, the Wuhan Institute of Posts and Telecommunications (WRI) had undertaken national key basic research development program project 'ultra-high speed, ultra-large capacity, ultra-long distance (3U) optical transmission based research' as leading agency. Under support project, we have obtained a series achievements in scientific engineering. Some results been widely used commercial systems. This Review will make preliminary summary during past 5 years.

In this paper, we propose a comprehensive security solution for mobile IPv6 networks including secure binding update, fast handover, user authentication and session key management data security. our proposal, one of the home agent's functions is to act as proxy its nodes. The based on certificate secret keys are generated by strong cryptosystems. Since these long term, it more suitable handover in network. addition, major operations deployed fixed wired machines, i.e., agents nodes, keeps...

We propose a signal-to-signal beating interference (SSBI) cancellation scheme in two-mode fiber (TMF) transmission system based on balanced detection without requirement of guard band. The SSBI can be eliminated the mode selectivity characteristic coupler. coupler relies coupling behavior between fundamental LP <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">01</sub> and first-order xmlns:xlink="http://www.w3.org/1999/xlink">11</sub> , which is...

In this paper, an interference fading mitigation method based on subband phase-shift transform in coherent phase-sensitive optical time-domain reflectometer ( <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex-math notation="LaTeX">$\Phi$</tex-math></inline-formula> -OTDR) is proposed. The operation principle of the with complementary amplitude characteristic presented. phase shift performed digital domain without requiring complex...

Mobile IPv6 allows mobile nodes to remain reachable while moving around in the Internet. In IPv6, each node is always identified by its home address, regardless of current point attachment While situated away from home, a also associated with care-of which provides information about node's location. This chapter reviews security threats and solutions particular emphasis on binding update operation - central mandatory achieve efficient mobility support IPv6. The inform agent correspondent new...