By stacking alternatively rotated gallium phosphide (GaP) plates, the maximum photon conversion efficiency of 40% for terahertz (THz) generation based on difference-frequency has been achieved. The corresponding peak power generated inside four GaP plates approaches 4 kW. As number is increased from to five, THz output significantly decreased, due back parametric conversion.

Mild thermal stimulation plays an active role in bone tissue repair and regeneration. In this work, a bioactive polydopamine/Ti

Coherent terahertz pulses have been generated at 328.2μm (914.1GHz) by frequency-mixing two CO2 laser lines near 10μm based on collinearly phase-matched difference-frequency generation in GaSe crystals. The highest average output power was measured to be 260μW, corresponding a peak of 510mW. Both the powers and normalized conversion efficiencies significantly improved over previous results. are expected narrowest linewidth dictated pulse width through Fourier transform characteristics beams.

While flexible supercapacitors with high capacitance and energy density is highly desired for outdoor wearable electronics, their application under low-temperature environments, like other storage devices, remains an urgent challenge. Solar thermal converts solar light into heat has been extensively applied desalination power generation. In the present work, to address failure problem of devices in a cold environment, was used improve supercapacitor performance at low temperature. As proof...

A high-resistivity GaP crystal was used to generate monochromatic THz pulses with peak output powers reaching 722 W at 108.1 μm by mixing two coherent beams about 1 based on phase-matched difference-frequency generation. By stacking and three plates their second-order nonlinear coefficients being switched between the adjacent ones, we have increased power 120.3 from 433.4 1.36 2.36 kW, respectively. kW corresponds photon conversion efficiency of 25%, which is orders magnitude higher than our...

We analytically solve the guided transverse magnetic modes of symmetrical planar slot waveguides and show that multiple may exist in a waveguide. For all types with index greater than cladding vice versa, field solutions characteristic equations are derived cutoff conditions provided discussed.

Linearity is of utmost importance for avalanche photodiodes (APDs) used in communication systems Ethernet beyond 10 Gbit/s. APDs with high linearity are able to extend the transmission distance without additional power consumption, but has not been investigated detail. In this paper, a model InGaAs/InAlAs separate absorption, grading, charge and multiplication (SAGCM) APD established optimize parameters device. The simulated results show that grading layer critical by reducing thickness or...

We propose using physical-informed neural network (PINN) for power evolution prediction in bidirectional Raman amplified WDM systems with Rayleigh backscattering (RBS). Unlike models based on data-driven machine learning, PINN can be effectively trained without preparing a large amount of data advance and learn the potential rules evolution. Compared to previous applications prediction, our model considers pumping RBS, which is more practical. experimentally demonstrate 200 km...

Open AccessCCS ChemistryRESEARCH ARTICLES20 May 2024Woven Crosslinks and Multiple Non-Covalent Interactions Enabled an Ultra-Tough, Highly-Stretchable, Recyclable Ionogel Wan-Ying Li, Yi Jiang Meifang Zhu Li , https://doi.org/10.31635/ccschem.024.202404230 SectionsSupplemental MaterialAboutPDF ToolsAdd to favoritesDownload CitationsTrack Citations ShareFacebookTwitterLinked InEmail Ultra-tough, highly stretchable, self-healable ionogels are urgently desired due their unique properties, such...

We demonstrate that the average output power of terahertz pulses generated by difference-frequency generation in stacked GaAs wafers is scaled up a factor 160. Such scaling made possible achieving first-order quasiphase matching for efficient conversion 590 μm thick (110) using two CO2 laser pulses. The highest measured to be 29.8 μW stacking ten wafers.

We have implemented a single-photon detection system in the 1.55-μm region, based on frequency up-conversion MgO-doped periodically poled LiNbO3 waveguide. subsequently reached record-low dark count rate of 45 counts per second. The detectable signal photon rate, i.e., for counting up-converted photons corrected by counts, noises, and losses, reaches value 81 Through free-space coupling, we eliminated induced parametric fluorescence.

Second-harmonic generation was phase-matched at the fundamental wavelength of 10.6 mum in an annealed ZnGeP(2) crystal room temperature. Our results demonstrated that phase-matching angle decreased with increasing pump power. Such a unique dependence resulted significant enhancement on second-harmonic output The highest average power 5.3 55 mW for 5.0 W, which corresponded to conversion efficiency 1.1%. Due laser-induced heating effect, increased by 65%. efficient made possible also using...

We review our recent efforts on power scaling of THz pulses generated from several nonlinear-optical crystals. By using a high-resistivity GaP crystal, we have significally increased the output peak to as high 722 W. stacking three wafers, further highest 2.36 kW. On other hand, by CO2 laser pulses, obtained average 260 μW. also used these scale up for 29.8 μW GaAs wafers. Indeed, ten factor 160. Finally, ultrafast achieved record-high powers multi-period periodically-poled LiNbO3 crystals...

Transverse electric (TE) modes in symmetrical planar slot waveguides are analytically solved, and a comprehensive knowledge about them is provided. It has been shown that there four types of TE just as the TM modes. Their field solutions, characteristic equations cut-off conditions derived. The power confinement factors compared. demonstrated may be degeneration points between Because three-dimensional waveguide similar modal characteristics its counterpart, our work presents foundation...

Based on Adina finite element software, this paper established elaborate model in consideration of the fluid-structure interaction between structure and air, then compared stress on-site monitoring simulation which wind speed is 5m/s.Finally, based Davenport spectrum, analyzed dynamic response power tower for pulsating 10a , 20a 50a suggested more accurate method when wind-induced response.The study shows: The used mostly consistent with monitoring; FSI makes a better accuracy than...

Resonant optical gyroscopes suffer serious performance degradation induced by noises. We propose using an air-gap silicon-on-silica slot waveguide ring resonator as the resonant cavity of a integrated gyroscope. estimate possible backscattering, Kerr effect, polarization fluctuation, and thermal drift in waveguide. It is shown that nonlinearity, instabilities can decrease significantly compared to those common solid-core silicon cavity, perturbations fluctuation may be eliminated. In...

Get PDF Email Share with Facebook Tweet This Post on reddit LinkedIn Add to CiteULike Mendeley BibSonomy Citation Copy Text Y. Jiang, D. Li, J. Ding, and I. B. Zotova, "Broadband Phase-Matched Backward Difference-Frequency Generation: A Novel Scheme for Spectral Optical Phase Conjugation," in CLEO:2011 - Laser Applications Photonic Applications, OSA Technical Digest (CD) (Optica Publishing Group, 2011), paper JThB92. Export BibTex Endnote (RIS) HTML Plain alert Save article

We review some of our recent results on frequency upconversion. Frequency upconversion laser pulses at 10.26 μm to those 1.187 was measured in the presence Nd:YAG based difference-frequency generation a 10-mm-long GaSe crystal. The highest power conversion efficiency for parametric determined be 20.9%, corresponding photon 2.42%. This value is two orders magnitude higher than reported literature. saturation output as input increased, due back conversion, i.e. + → 1.064 μm, clearly evidenced....

We review our previous results on frequency upconversion. Frequency upconversion of laser pulses at 10.26 μm to those 1.187 was measured in the presence Nd:YAG based differencefrequency generation a 10-mm-long GaSe crystal. The highest power conversion efficiency for parametric determined be 20.9%, corresponding photon 2.42%. This value is two orders magnitude higher than reported literature. saturation output as input increased, due back conversion, i.e. + → 1.064 μm, clearly evidenced....

We review our recent efforts on power scaling of THz pulses generated by several nonlinear crystals. By using a single GaP crystal and stacking three plates, we have significantly increased the output peak to as high 722 W 2.36 kW, respectively. On other hand, CO₂ laser pulses, obtained average 260 μW. also used these scale up for 29.8 μW GaAs wafers. Indeed, ten wafers, factor 160. Finally, ultrafast achieved record-high powers from multi-period periodically-poled...

Coherent ns pulses for 2 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">nd</sup> , 3 xmlns:xlink="http://www.w3.org/1999/xlink">rd</sup> and 4 xmlns:xlink="http://www.w3.org/1999/xlink">th</sup> harmonics of CO <inf xmlns:xlink="http://www.w3.org/1999/xlink">2</inf> laser frequency were efficiently generated from GaSe crystals, with corresponding output peak powers as high 443 W, 23 respectively.