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[IEEE 2018 20th International Conference on Transparent Optical Networks (ICTON) - Bucharest (2018.7.1-2018.7.5)] 2018 20th International Conference on Transparent Optical Networks (ICTON) - Antiresonant Oxide Island as a Measure for Improved Single-Mode Emission in VCSELs
摘要： In this paper, we propose a novel ARROW VCSEL structure with an antiresonant oxide island placed inside the resonant cavity with the use of planar oxidation technique. The oxidized island does not only improve single-mode emission, which is one of the most desired effects in vertical-cavity surface-emitting lasers (VCSELs), but also has a strong impact on modal loss associated with each lateral mode and affects the shape of their profiles. In this work, we investigate the physical basis of this impact and show how the dimensions of oxidized island determine optical properties of the ARROW VCSEL, leading to the strongest modal discrimination.
关键词： optical modeling,oxidation,ARROW,VCSEL,antiresonance,waveguiding
更新于2025-09-23 15:23:52
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Prediction Quality of Glucose Trend Indicators in Two Continuous Tissue Glucose Monitoring SystemsParts of these data were previously presented at the 53rd Annual Meeting of the European Association for the Study of Diabetes, September 11–15, 2017, Lisbon, Portugal.
摘要： Background: Continuous interstitial glucose monitoring (CGM) systems often provide glucose trend indicators (e.g., arrows) in addition to current glucose values. These indicators are recommended to be used in therapeutic decisions, because they are ascribed predictive qualities by CGM system manufacturers and expert committees. This study assessed how reliably trend indicators match future glucose change, because such information is missing. Methods: In a clinical trial, two different CGM systems were used by 20 participants, with two sensors of each system per patient. Participants used the systems for 14 days with three study site visits (48 h each). During study site visits, glucose trend indicators, as displayed by the CGM systems, were recorded at least once per hour during daytime and once at night in a diary. In addition, CGM data were downloaded from the devices. Trend indicators were compared with glucose change calculated from CGM data >30 min after recording the trend indicator. Results: Approximately 60% of trend indicators matched the glucose change calculated from CGM data. More than 10% of trend indicators differed by at least two trend indicator categories. Focusing on trend indicators recorded around carbohydrate (CHO) intake and insulin deliveries resulted in approximately half of trend indicators matching the calculated glucose change. Conclusions: Trend indicators do not always match future glucose change, especially within the first few hours after CHO intake and insulin deliveries. Manufacturers’ labeling and recommendations should reflect this, so that CGM users can make informed decisions.
关键词： Trend arrow,Trend indicator,Continuous glucose monitoring,Nonadjunctive use,Blood glucose monitoring replacement
更新于2025-09-23 15:23:52
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[IEEE 2018 International Conference on Numerical Simulation of Optoelectronic Devices (NUSOD) - Hong Kong, China (2018.11.5-2018.11.9)] 2018 International Conference on Numerical Simulation of Optoelectronic Devices (NUSOD) - Modeling Modal Properties of Antiresonant VCSEL with Bessel Expansion Transfer Method
摘要： We study optical properties of an ARROW-VCSEL, in which the anti-resonant effect is provided by an oxide island manufactured with planar oxidation inside the optical cavity. We implement a novel Bessel Expansion Transfer Method to show how this effect alters the nature of the laser modes by forcing qualitative change in the optical field profiles.
关键词： single-mode,resonance,ARROW-VCSEL,Bessel expansion,modal transfer method,orthogonality,oxidation
更新于2025-09-23 15:22:29
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Defining the Work Done on an Electromagnetic Field
摘要： The problem of defining work done on an electromagnetic field (EMF) via moving charges does not have a ready solution, because the standard Hamiltonian of an EMF—whose time derivative should define the work according to the first law—is not gauge invariant. This limits applications of statistical mechanics to an EMF. We obtained a new, explicitly gauge-invariant Hamiltonian for an EMF that depends only on physical observables. This Hamiltonian allows us to define work and to formulate the second law for an EMF. It also leads to a direct link between this law and the electrodynamic arrow of time, i.e., choosing retarded, and not advanced solutions of wave equations. Measuring the thermodynamic work can determine whether the photon mass is small but nonzero.
关键词： photon mass,work,second law,Hamiltonian,electromagnetic field,gauge invariance,electrodynamic arrow of time
更新于2025-09-23 15:19:57
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[IEEE 2019 3rd International Conference on Trends in Electronics and Informatics (ICOEI) - Tirunelveli, India (2019.4.23-2019.4.25)] 2019 3rd International Conference on Trends in Electronics and Informatics (ICOEI) - A Review On Liquid Core Waveguide based MOEMS Structures
摘要： An integrated optic technology with liquid core waveguide (LCW) has biomedical application in real time. The different structure of liquid core waveguide and mathematical modeling is implemented in this paper. The ARROW (Anti resonant reflecting optical waveguide) is simulated at 532nm wavelength gives 0.047dB loss and the effective index of 1.458715 for hundred percent Transfer Electric (TE) polarization factor. The Finite Difference Eigen (FDE) mode mathematical model is used.
关键词： Liquid Core waveguide (LCW),effective index,ARROW,FDE,PDMS
更新于2025-09-11 14:15:04
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Performance enhancement by shade dispersion of Solar Photo-Voltaic array under continuous dynamic partial shading conditions
摘要： Partial shading adversely affects the output parameters of the Solar Photo-Voltaic (SPV) array because it causes shading of some panels and at the same time, other panels in the array remain unshaded. This also hinders the performance of SPV Array by causing multiple peaks in the voltage-power characteristics and abrupt changes in the row current. In this work, conventional Total Cross-Tied (TCT) panels are reconfigured based on the Arrow Sudoku (AS) puzzle pattern. This reconfiguration minimizes the mismatch of current between the rows. The physical locations of shaded and unshaded panels are changed in this reconfiguration technique, without altering their electrical connections. This reconfiguration can dodge the requirement of complex maximum power point tracking algorithms. The performance of the proposed approach is investigated in terms of maximum output power, mismatch power loss and utility factor. A comprehensive analysis of the proposed reconfiguration for different continuous dynamic partial shading conditions like top to bottom, diagonal and left to right shading, proves its efficacy. The outperforming nature of the proposed approach with respect to the existing state-of-art approaches for all cases of the partial shading conditions provides apparent evidences in support of its utility.
关键词： Arrow Sudoku (AS),Partial Shading,Shade dispersion,Array configurations,Power generation
更新于2025-09-10 09:29:36