A5101686244- Optical Wireless Communication Technologies
- Underwater Vehicles and Communication Systems
- Image Enhancement Techniques
- Advanced Fiber Optic Sensors
- Water Quality Monitoring Technologies
- Primary Care and Health Outcomes
- Semiconductor Lasers and Optical Devices
- Healthcare Policy and Management
- Nail Diseases and Treatments
- Metamaterials and Metasurfaces Applications
- Photoacoustic and Ultrasonic Imaging
- Astronomical Observations and Instrumentation
- Optical Network Technologies
- Energy Harvesting in Wireless Networks
- Full-Duplex Wireless Communications
- Liquid Crystal Research Advancements
- Geriatric Care and Nursing Homes
- Wireless Communication Networks Research
- Random lasers and scattering media
- Palliative Care and End-of-Life Issues
- Optical Coherence Tomography Applications
- Reproductive tract infections research
- Clostridium difficile and Clostridium perfringens research
- Diphtheria, Corynebacterium, and Tetanus
- Optical Polarization and Ellipsometry
Zhejiang University
2015-2025
Zhejiang Ocean University
2001-2022
UCLA Health
2018
University of California, Los Angeles
2016
In this paper, a joint digital signal processing (DSP) scheme including partial response shaping and trellis coded modulation (TCM) technology is proposed to mitigate the bandwidth limitation of long-reach underwater wireless optical communication (UWOC) system. The similarity spectral responses between filter system utilized suppress enhancement noise distortion induced by full-response feed-forward equalizer. A random interleaver precoder are applied whiten distortion. laboratory...
The transmission distance of underwater wireless optical communication (UWOC) is severely limited by the rapid decay light intensity in water. Power-efficient pulse position modulation (PPM) and ultra-sensitive multi-pixel photon counter (MPPC) open door toward designing long-reach UWOC systems. In this paper, a 46-m system based on PPM MPPC was proposed experimentally demonstrated with ultra-low transmitting power into channel. Clear eye diagrams without any slot error for ten different...
To extend the transmission distance and relax strict alignment requirement of underwater wireless optical communication ((UWOC), we design implement a UWOC system using 3×1 fiber combiner high-sensitive multi-pixel photon counter (MPPC). The 50-m 100-m distances (corresponding to 24 attenuation lengths) are experimentally achieved with data rates 16.78 Mbps 8.39 Mbps, respectively, in standard swimming pool. Moreover, also investigate optimize performance misalignment tolerance this two...
Abstract Tunable filters are vital not only for dynamic display but also in the miniaturized spectral imaging system. Yet, present tunable devices possess low optical throughput, bulky volume, slow response, or complex configuration. In this paper, study proposed and experimentally demonstrated a compact filter module based on metagratings combined with liquid crystals (LC). By synergetic effect between birefringent LC dichroic metagratings, possesses distinct transmissive features by...
We experimentally demonstrate high-speed visible light communication (VLC) and high-quality solid-state lighting (SSL) using polymethyl-methacrylate-doped phosphor film based on cesium lead bromide quantum dot (CsPbBr3-QD) potassium fluorosilicate K2SiF6:Mn4+, which is excited by a blue gallium nitride laser diode. A 1.6 Gbps data rate achieved employing non-return-to-zero on-off keying modulation scheme. The measured bit error of 2.7×10-3 adheres to the standard threshold (3.8×10-3) forward...
Existing miniaturized spectral imagers have mutual restrictions among spatial, temporal, and resolutions, making them inadequate to meet practical needs. Here, we demonstrate a spatiotemporal filter array chip tackle the trade-off three resolutions for hyperspectral imaging. A 2 × Fabry-Perot is embedded inside tunable liquid crystal modulator, increasing number of filtering channels spatiotemporally in hardware, which empowers imager with high simultaneously. The transmission type...
For some industrial underwater wireless optical communication (UWOC) applications, the transmission distance matters more than rate. Attenuation length (AL) is an important indicator of UWOC system. In this paper, to best our knowledge, spread spectrum (SS) technology firstly applied in a system and capability extend or AL demonstrated. A 42-m experimentally demonstrated with 6.68 ALs. Compared conventional not-return-to-zero on-off-keying (NRZ-OOK) modulation scheme, proposed SS scheme gain...
In this paper, the arrays consist of series-connected monochromatic light-emitting diodes (LEDs) are proposed as transmitter and receiver to implement an LED-to-LED underwater wireless optical communication (UWOC) system. An array green LEDs is used enhance emitted power, high-frequency attenuation compensated by a pre-equalization circuit. Red connected in series, forming detector extend bandwidth receiver. Furthermore, lens group for homogenizing focusing light spot designed increase...
Solar panels are being increasingly used as detectors in underwater wireless optical communication (UWOC) systems, the large detection area can significantly simplify link alignment. However, greatest problem such a scheme is limited bandwidth of solar panel, which was originally optimized for energy harvesting rather than communication. In this Letter, we propose series-connected arrays high-speed detection, by taking deep dive into fundamentals array. As size array increases from 1×1 to...
In order to reduce turbulence-induced scintillation and deal with alignment problems, a 2×2 multiple-input multiple-output (MIMO) underwater wireless optical communication (UWOC) system is proposed experimentally demonstrated. With help of the large divergence angle light beams field view (FOV) detectors, effect high-density air bubbles greatly eliminated. Simulation experimental results confirm that, in most intensity-modulation/direct-detection (IM/DD) MIMO-UWOC systems, repetition coding...
The researchers conducted a communication training intervention for certified nursing assistants (CNAs). aimed at improving CNAs’ therapeutic techniques relating to agitated residents during care. This study focused on an in-depth evaluation of mealtime interactions using videos. Sixteen CNAs and 16 living with dementia from one long-term care facility were videotaped before after program. Mixed-effect Poisson regression revealed no effect the as whole residents’ refusals, but did improve...
In this paper, we first propose and then experimentally demonstrate underwater wireless-to-plastic optical fiber (POF) communication system with a fully passive lens installed at the front end of POF. A 2-m low-cost POF is used as an extender to efficiently increase transmission distance easily deliver laser beam desired place. fiber-pigtailed green diode (520 nm) 68 mA current was transmit beam. high coupling efficiency 88% measured in our system, which significantly higher than from calm...
Summary Primary care redesign for older adult patients is currently ongoing in countries with aging populations. One of the main challenges this type transformations how to estimate implementation costs different types health delivery organizations. This study compares start‐up and incremental expenses implementing a primary across 2 organization types: integrated group (n = 31) practices independent practice association (IPA) sites 213). Administrators involved completed cost capture...
Underwater water optical communication (UWOC) requires high-power laser transmitter with good beam quality for high-rate data modulation. Since master oscillator power amplifier (MOPA) has the characteristic of preserving property seed (e.g. bandwidth and quality), it is expected to resolve problem. In this paper, we theoretically simulate large-signal modeling amplified light frequency response a MOPA system experimentally 3-mW 1-um 145mW. The came from 1064-nm TO-Packaged diode was coupled...