A Fabry-Perot Bragg grating cavity enhanced four-wave mixing process with a conversion efficiency of -37.7 dB is demonstrated experimentally on a Si 3 N 4 chip. A thermal-tuning based phase matching approach is also demonstrated.
In order to avoid side reactions with liquid electrolyte for the prelithiation method using metal lithium for the improvement of initial coulombic efficiency and prelithiation efficiency, we propose the solid electrochemical corrosion (SEC) of lithium replacing liquid electrolyte with solid electrolyte of lithium phosphorus oxynitride (LiPON) in previous works. However, the low prelithiation rate of solid electrochemical corrosion with LiPON interlayer between anode and lithium hinders its possible large-scale application. Here, an ultrathin film of Bi2O3 is introduced as the interface layer to improve the prelithiation rate of SEC, the prelithiation effects are investigated on both graphite and SiOx/C anodes by morphological, spectroscopic and electrochemical characterizations. The initial coulombic efficiencies of graphite and SiOx/C anodes can be respectively increased by about 5.1% and 9.7% after the prelithiation. The prelithiation efficiency values are as high as 79.3% for graphite and 86.7% for SiOx/C with SEC prelithiation. Our results demonstrate that SEC prelithiation with Bi2O3 interface layer could be applied to improve the capacity and cycling performance of lithium-ion batteries.
We report a novel method to generate arbitrary optical focus arrays (OFAs). Our approach rapidly produces computer-generated holograms (CGHs) to precisely control the positions and the intensities of the foci. This is achieved by replacing the fast Fourier transform (FFT) operation in the conventional iterative Fourier-transform algorithm (IFTA) with a linear algebra one, identifying/removing zero elements from the matrices, and employing a generalized weighting strategy. On the premise of accelerating the calculation speed by >70 times, we demonstrate OFA with 99% intensity precision in the experiment. Our method proves effective and is applicable for the systems in which real-time OFA generation is essential.
ABSTRACT Background Transition readiness is a key predictor of the success of the medical transition. There are numerous categories of assessment instruments for transition readiness in adolescents with chronic disease, but systematic integration and standardized evaluation of instruments are limited regarding measurement properties, complicating the selection of scientifically valid and reasonable instruments. This review aimed to critically appraise, compare, and summarize the transition readiness assessment instruments in adolescents with chronic diseases. Methods A comprehensive search was conducted in 10 databases from their inception to September 3, 2023. The Consensus‐based Standards for Selection of Health Measurement Instruments (COSMIN) systematic review guideline was used to evaluate the quality of the Patient‐Reported Outcome Measures (PROMs) and to facilitate the recommendation of the most suitable measuring instruments. Results The total number of retrieved articles was 1798, out of which 74 were selected for full‐text evaluation. Finally, a total of 41 articles were included, involving 22 transition readiness assessment instruments. Nine of the assessment instruments were generalized assessment instruments, whereas 13 were for specific chronic diseases. Because of insufficient or uncertain content validity and moderate or low quality of evidence, the 22 assessment instruments were recommended by grade B. Conclusions This systematic review offers a comprehensive overview of the measurement characteristics of the transition readiness assessment instrument for adolescent patients with chronic illnesses, along with corresponding recommendations. The findings indicate that no instrument demonstrated superior performance over others. Consequently, future efforts should focus on developing additional high‐quality instruments in accordance with COSMIN guidelines to evaluate transition readiness among this population precisely.
We have developed an innovative loss characterization approach suited for record-high Q (> 1×106) Bragg grating cavities. The demonstration sample's loss is evaluated to be 0.24 dB/cm, with a resolution limit of 0.001 dB/cm.
A 1.5-μm wavelength superluminescent light source operating at a heat sink temperature of 13/spl deg/C with the following properties was realized: 20-mW continuous wave output power, 130-nm spectral bandwidth, and 0.2-dB spectral modulation. This light source consists of an angled facet single-mode waveguide with a rear absorption region. These results were obtained by optimizing the epitaxial design, the waveguide design, and the device mounting.
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