A5101896530- Semiconductor Lasers and Optical Devices
- Optical Network Technologies
- Advanced Photonic Communication Systems
- Dental materials and restorations
- Photonic and Optical Devices
- Dental Erosion and Treatment
- Bone Tissue Engineering Materials
- Advanced Optical Network Technologies
- Endodontics and Root Canal Treatments
- Dental Research and COVID-19
- Surface Modification and Superhydrophobicity
- Block Copolymer Self-Assembly
- Electrowetting and Microfluidic Technologies
- Optical Wireless Communication Technologies
- Advanced Polymer Synthesis and Characterization
- Advanced Fiber Optic Sensors
- Diatoms and Algae Research
- Occupational health in dentistry
- Calcium Carbonate Crystallization and Inhibition
- Temporomandibular Joint Disorders
- Dental Trauma and Treatments
- Mesoporous Materials and Catalysis
- Graphene and Nanomaterials Applications
- Power Line Communications and Noise
- Advanced Fiber Laser Technologies
Ningbo No. 2 Hospital
2022-2025
Zhejiang University
2018-2022
Stomatology Hospital
2018-2021
Hangzhou Xixi hospital
2018
University of Georgia
2007
Stanford University
1991-2005
We investigate the performance of coherent analog optical links employing amplitude modulation (AM), phase (PM), and frequency (FM). The these is compared to that AM direct-detection (DD) links. signal-to-noise ratios, nonlinearities, and-spurious-free dynamic ranges (SFDR's) foregoing are evaluated. calculate SFDR for using DFB Nd:YAG lasers with typical linewidths 10 MHz 5 kHz, respectively. PM FM dominated by noise above a critical value received power. For linewidth MHz, SFDR's 30 31 dB,...
We propose a novel fluorescent adhesive-assisted biomimetic mineralization strategy, based on mild self-etch adhesive containing 25 wt% polyacrylic acid-stabilized amorphous calcium phosphate nanoparticles and 1 sodium fluorescein.
Fiber infrastructures in future personal communication systems (PCSs) must minimize remote antenna size and cost, facilitate system maintenance upgradeability. These goals can be met by a centralized PCS infrastructure using analog fiber-optic links. It is essential that the relationship between optical-link quality terms of spurious-free dynamic range (SFDR) service accurately quantified so optical device other design requirements determined. This paper presents comprehensive...
Abstract Demineralization of hard tooth tissues leads to dental caries, which cause health problems and economic burdens throughout the world. A biomimetic mineralization strategy is expected reverse early caries. Commercially available anti-carious mineralizing products lead inconclusive clinical results because they cannot continuously replenish required calcium phosphate resources. Herein, we prepared a film consisting hydroxypropylmethylcellulose (HPMC) polyaspartic acid-stabilized...
This study investigated the regional microtensile bond strength (MTBS) and cohesive of bovine enamel. The crowns incisors were sectioned, either horizontally along incisal cervical thirds to produce horizontal tangential segments, or longitudinally midline longitudinal segments. Half segments prepared using a 45° bevel. Then, differently sectioned enamel surfaces treated with one‐ two‐step self‐etch adhesives (Clearfil SE Bond Clearfil S3 Bond) composite resin Majesty) was placed....
A heterodyne interferometric phase modulated link, a new analog optical is described. This based on modulation using an external modulator, has high linearity and suppresses the impact of laser relative intensity noise. The link increases spurious-free dynamic range by 21 dB as compared to conventional externally AM for 10 mW received power, noise -130 dB/Hz, 15-GHz intermediate frequency.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
Theoretical models were developed to accurately describe the behavior of directly modulated communication systems with a predetection optical frequency discriminator. A ten-channel 100-Mb/s subcarrier multiplexed (SCM) system DFB laser light source and fiber Fabry-Perot discriminator was built. For an input power -17 dBm 67-GHz filter achieved optimal CNR 23 dB at modulation index ( beta ) 0.5, compared 17 approximately=0.3 for 10-GHz System performance demonstrated excellent agreement...
Present extensions of the rigorous model Jacobsen and Garrett Gaussian approximation Tonguz Kazovsky for performance optically amplified direct detection ASK receivers. These new models take into account incomplete modulation, nonzero laser linewidth, spontaneous emission noise from optical amplifier in both polarization control (PC) diversity (PD) receiver configurations. The penalty associated with configuration is shown to be consistently under 1 dB a wide range modulation depths. due...
We propose a passive antenna remote unit (PARU) architecture which can be used in future optical fiber-based PCS networks. This system is robust, easy to maintain, and upgradeable multi-GHz frequencies. By using externally modulated Nd:YAG lasers coherent detection on the uplink, far more efficient than for direct (DD) uplink terms of subcarrier multiplexed (SCM) voice video channels per laser, meeting an spurious-free dynamic range (SFDR) requirement 55 dB. For channels, FM AM DD support,...
The authors present a noise analysis of an analog subcarrier-multiplexing coherent optical system for video transmission using direct frequency modulation semiconductor lasers. Receiver sensitivity the FM subcarrier format is analyzed realistic values receiver thermal (3.31*10/sup -22/ A/sup 2//Hz), laser linewidth (up to 100 MHz), relative intensity (RIN) (-130 -170 dB/Hz), and bandwidth (20 GHz). Linewidth-induced performance degradation negligible up 50 channels, RIN-induced becomes...
Dynamic wettability of a nanostructured surface is an important property for many liquid-related applications nanostructures. The dynamic analysis performed by measuring the evolution precursor (outer rim) contour water droplet as it spreads on surface. A video-based metrological system based snake active model which capable precisely tracking spreading in high frame-rate video developed. radius empirically observed to obey power law with respect time. Experiments show reasonable agreement...
A new heterodyne interferometric phase modulation (HIPM) link and a subcarrier frequency with direct detection (SFM-DD) are proposed. To generate angle-modulated signals at the receiver, HIPM system utilize novel external modulator, while SFM-DD uses electronic preprocessing. The spurious free dynamic ranges (SFDR) of systems larger than that amplitude (AMDD) system; when relative intensity noise (RIN) is dominant, these two can show 26 dB 28 advantages respect to AMDD system, respectively.<...
Abstract Demineralization of tooth hard tissues leads to dental caries, which causes health problem and economic burden throughout the world. Biomimetic mineralization strategy is expected reverse initial caries. Commercially available mineralizing anti-carious products lead indefinite clinical results because they could not continuously replenish calcium phosphate resources. Herein, we prepared a novel film (NMF) consisting hydroxypropylmethylcellulose (HPMC) polyaspartic acid-stabilized...
STARNET is a 2.5-Gbit/s/wavelength (half duplex) reconfigurable optical WDM computer-communication network that uses 125-Mbit/s FDDI-compatible logical ring subnetwork for control information.1 combined modulation to transmit both information and wideband pay-load data (over the network) with single transmitter. Separate receivers are used recover payload data. In Experiment A, we demonstrated use of DFB semiconductor laser two streams (network-control data) by using FSK/ASK modulation.
The advantages of analog subcarrier-multiplexed (SCM) FM video transmission using frequency modulation the optical carrier over other laser schemes include reduced impact relative intensity noise and phase suppression achievable in a receiver employing demodulation both subcarrier carrier. Way et al.1 detected these FM-FM signals an erbium-doped fiber amplifier discriminator followed by direct-detection receiver. We examine performance coherent for same use.
Direct frequency modulation of a distributed-feedback (DFB) semiconductor laser is an attractive technique because it can obtain high depths with low drive powers. For direct-detection systems optical frequency, discriminator must precede the photodetector. Systems that use filters as discriminators are also well suited for wavelength- division-multiplexing (WDM) applications amplifiers.1,2 Then, filter reduces amplified-sponta- neous-emission (ASE) noise and provides wavelength selectivity....