A5017065945- Advanced Fiber Optic Sensors
- Photonic and Optical Devices
- Optical measurement and interference techniques
- Advanced Fiber Laser Technologies
- Magneto-Optical Properties and Applications
- Advanced Photonic Communication Systems
- Advanced Measurement and Metrology Techniques
- Optical Polarization and Ellipsometry
- Surface Roughness and Optical Measurements
- Photonic Crystal and Fiber Optics
- Optical Network Technologies
- Optical Coherence Tomography Applications
- Orbital Angular Momentum in Optics
- Advanced Photocatalysis Techniques
- Advanced Optical Imaging Technologies
- Digital Holography and Microscopy
- Photorefractive and Nonlinear Optics
- Gas Sensing Nanomaterials and Sensors
- Scientific Measurement and Uncertainty Evaluation
- Liquid Crystal Research Advancements
- Semiconductor Lasers and Optical Devices
- Robotic Locomotion and Control
- Full-Duplex Wireless Communications
- Robotics and Sensor-Based Localization
- Optical Coatings and Gratings
Feng Chia University
2015-2024
Guangdong University of Technology
2020-2024
Xi'an University of Architecture and Technology
2021-2024
National Cheng Kung University
2022
Facing Our Risk of Cancer Empowered
2021
Beihang University
2018-2019
National Yang Ming Chiao Tung University
2002-2004
A polyaniline (PANI)/tin oxide (SnO2) composite for a CO sensor was fabricated using film composed of SnO2 nanoparticles and PANI deposition in the present study. Tin were synthesized by sol-gel method. The provided high surface area to significantly enhance response change concentration at low operating temperature (<75 °C). excellent mainly attributed relatively good properties redox reaction during sensing, which produced great resistance difference between air gas temperature....
In this demonstration, we propose and investigate a stable tunable single-longitudinal-mode (SLM) erbium-doped fiber (EDF) ring laser structure. Here, in order to achieve the SLM output, "eye-type" triple-ring scheme is designed EDF suppress densely spaced longitudinal modes. measurement, output power optical-signal-to-noise ratio (OSNR) are between 8.35 8.92 dBm 33.2 35.7 dB, respectively, wavelength range of 1530 1560 nm. The proposed architecture not only has free tuning step but provides...
This work proposes a simple method, based on the crystal rotation technique and heterodyne interferometry, to simultaneously determine pretilt angle cell gap of nematic liquid cells. When light passes through cell, phase retardation given by characteristic parameters can be measured accurately interferometry. relates angle, gap, incidence cell. By using retardations at two incident angles, estimated numerical analysis. method is feasible, requiring only angles prior knowledge...
In this work, we demonstrate a wavelength-tunable erbium-doped fiber (EDF) ring laser with stable single-longitudinal-mode (SLM) output. Here using the self-injection method and unpumped EDF-based saturable absorber can suppress other densely sidemode to achieve SLM. Hence, output power optical signal-to-noise ratio of proposed EDF are between -7.1 2.1 dBm 30.1 36.5 dB in tuning range 1525.0 1574.0 nm, respectively. According structure, wavelength operation extend shorter L-band from C-band....
Inthe work, we study and express a new wavelength-division-multiplexing passive optical network (WDM-PON) architecture with fiber fault protection. The designed unit (ONU) module periodic spectrum of 2 × N array waveguide grating (AWG) are applied to produce the self-protected mechanism. Here, employ free space communication (FSO)- fiber-based connection between two adjacent ONUs achieve signal relink. Moreover, corresponding performances downstream upstream also analyzed discussed.
In this paper, we propose and experimentally illustrate a wavelength-switchable erbium-doped fiber (EDF) dual-ring (DR) laser with stable single-longitudinal-mode (SLM) oscillation. the experiment, silicon-micro-ring-resonator (SiMRR) is applied in proposed DR cavity for tuning different output wavelengths, when birefringence loss adjusted correctly. To compress densely multilongitudinal-mode oscillations, scheme together 2-m unpumped EDF-based saturable absorber acted as mode filter. The...
Bismuth oxide photocatalysts were synthesized and coated on the front surface of phosphor‐converted white light‐emitting diodes to produce a safe environmentally benign lighting source. photocatalyst powders with spray pyrolysis method at 500°C, 600°C, 700°C, 800°C. Using absorption spectrum in blue UV regions bismuth photocatalysts, light leakage problems LEDs can be significantly reduced. The experimental results showed that 700°C exhibited most superior inhibiting ability. suppressed...
In this study, a novel moiré fringe analysis technique is proposed for measuring the surface profile of an object. After applying relative displacement between two gratings at constant velocity, every pixel CMOS camera can capture heterodyne signal. The precise phase distribution fringes be extracted using one-dimensional fast Fourier transform (FFT) on pixel, simultaneously filtering harmonic noise fringes. Finally, tested objected generated by substituting into relevant equation. findings...
In the digital era, data collaboration constitutes a critical trend in urban planning and design. It is of paramount importance addressing contemporary issues related to misinterpretation, misapplication, misunderstanding spatial genes, as well facilitating sharing value creation associated with genes. this paper, targeting complex problems multiple entities threads gene research practice through, initially, literature review, correlation process between examined, concept background its...
In this research, we present and study an erbium fiber laser with triple-fiber-ring (TFR) scheme for continuous-wave (CW) wavelength-selection. The designed TFR not only can achieve single-longitudinal-mode (SLM) oscillation, but also spread the tuning range from 1519.0 to 1583.0 nm covering C- part of L-bands. Moreover, 0 dB power fluctuation be obtained 1523.0 1559.0 flattened operation based on compound-ring configuration. Lorentzian linewidths 22 29 kHz are attained in entire...
Based on the coupled-wave theory, a holographic spatial walk-off polarizer (HSWP) is designed. This HSWP transmission-type phase volume grating substrate and its optical recording geometry can be derived from Chen's corrected methodology with desired reconstruction condition. A pair of fabricated HSWPs splitting angle 60 degrees applied to assemble new type 4-port polarizationindependent circulator. The operating principles characteristics proposed prototype circulator are discussed.
The Bragg mismatching condition for volume holograms occurs because of the changes in thickness and refractive index holographic recording materials during reconstruction procedures. We propose an improved compensation method to physically correct these effects fabrications optical interconnects. In order show validity this method, Slavich photographic plate VRP-M is used fabricate correction diffraction angle shift about 2.10°, which induced by 6.14% film shrinkage 0.06 shift, successfully...
Cerium dioxide (CeO2, ceria), a promising and abundant catalytic material with high-efficiency, nontoxicity, photochemical stability, affordability, can be used as photocatalyst to photocatalytically degrade organics split water for hydrogen production under ultraviolet (UV) irradiation (about 5% of solar energy). However, the applications CeO2 are limited due low photocatalytic efficiency sunlight irradiation. In this study, nanosized powder was prepared by precipitation method....