A5100327813- Photonic and Optical Devices
- Advanced Fiber Optic Sensors
- Advanced Fiber Laser Technologies
- Optical Network Technologies
- Photonic Crystal and Fiber Optics
- Semiconductor Lasers and Optical Devices
- Advanced Photonic Communication Systems
- Photonic Crystals and Applications
- Semiconductor Quantum Structures and Devices
- Structural Health Monitoring Techniques
- Plasmonic and Surface Plasmon Research
- Water Quality Monitoring Technologies
- Mechanical and Optical Resonators
- Underwater Vehicles and Communication Systems
- Photorefractive and Nonlinear Optics
- Analytical Chemistry and Sensors
- Geotechnical Engineering and Soil Stabilization
- Advanced Optical Network Technologies
- Geotechnical Engineering and Soil Mechanics
- Advanced Optical Sensing Technologies
- Advanced MEMS and NEMS Technologies
- Thermal Analysis in Power Transmission
- Optical measurement and interference techniques
- Optical Coherence Tomography Applications
- Gyrotron and Vacuum Electronics Research
Shandong University of Science and Technology
2012-2025
Harbin Engineering University
2019-2024
Shandong University
2023-2024
Institute of Semiconductors
2009-2023
Beijing Jiaotong University
2013-2023
State Key Laboratory on Integrated Optoelectronics
2011-2023
Beijing Municipal Education Commission
2022-2023
Nankai University
2023
Chinese Academy of Sciences
2011-2023
Wuhan University of Technology
2023
We demonstrate a compact waveguide-based high-speed Ge electro-absorption (EA) modulator integrated with single mode 3 µm silicon-on-isolator (SOI) waveguide. The EA is based on horizontally-oriented p-i-n structure butt-coupled deep-etched silicon waveguide, which transitions adiabatically to shallow-etched large core SOI demonstrated device has active region of 1.0 × 45 µm(2), total insertion loss 2.5-5 dB and an extinction ratio 4-7.5 over wavelength range 1610-1640 nm -4V(pp) bias....
Simultaneous measurement of pressure and temperature in seawater is realized based on polydimethylsiloxane (PDMS) sealed microfiber Mach-Zehnder interferometer (MZI). Benefitting from the high thermal-optic coefficient large elasticity PDMS, sensitivity robust structure can be obtained. In theoretical modeling, significant enhanced response fiber observed clearly, or sensitivities are calculated theoretically. experiment, PDMS MZI fabricated by a two-step sealing method. Using this MZI,...
InGaAs-InP modified charge compensated uni- traveling carrier photodiodes with both absorbing and nonabsorbing depleted region are demonstrated. The fiber-coupled external quantum efficiency was 60% (responsivity at 1550 nm = 0.75 A/W). A 40-mum-diameter photodiode achieved 14-GHz bandwidth 25-dBm RF output power a 20-mum-diameter exhibited 30-GHz 15.5-dBm power. saturation current-bandwidth products 1820 mA ldr GHz 1560 for the devices, respectively.
Fast, compact, and power-efficient silicon microcavity electro-optic modulators are expected to be critical components for chip-level optical interconnects. It is highly desirable that these can driven by voltage swings of 1 V or less reduce power dissipation make them compatible with supply levels associated current future complementary metal-oxide-semiconductor technology nodes. Here, we present a racetrack resonator modulator achieves over 8 dB modulation depth at 12.5 Gbps swing. In...
It is significant to develop new methods for temperature and salinity measurement in seawater since they are two important parameters physical oceanography application. In this paper, a approach simultaneous of based on microfiber Mach-Zehnder (MZ) interferometer with knot resonator proposed. The typical transmission spectra show the combined effect MZ interference resonance. When change, both dip resonance shift linearly. Based linear relation, matrix established, sample can be obtained...
The assessment of Coda Wave Interferometry (CWI) and Distributed Fiber Optics Sensing (DFOS) techniques for the detection damages in a laboratory size reinforced concrete beam is presented this paper. sensitivity these two novel to micro cracks discussed compared standard traditional sensors. Moreover, capacity DFOS technique localize quantify crack openings also assessed. results show that implementation CWI allow early subtle changes structures until formation. With their ability opening,...
In this Letter, we demonstrate a sensitivity-enhanced strain sensor based on shape-modulated multimode fiber (MMF). contrast to conventional single-mode–multimode–single-mode (SMS) structures, which typically contain single cylindrical homogeneous MMF section, the shape of section in investigation is modulated by lateral offset splicing multiple segments. Simulation results show that designed has higher peak mechanical than MMF. Experimental sensitivity achieved shaped-modulated MMF-formed...
The salinity and temperature of seawater are important parameters in oceanography. Based on the directional coupler assembled by polyimide-coated micro/nanofibers, optical sensors with high sensitivity for simultaneous sensing proposed. Dependences sensitivities wavelength, salinity, investigated theoretically, which performances such sensor under general sea conditions can be evaluated. Results show that reach levels nm/‰ nm/°C, much higher than those fiber Bragg gratings, knot resonators,...
A simple, high-sensitivity, and low-cost optical sensor for the measurement of temperature salinity in seawater is demonstrated based on a microfiber directional coupler. The shifts sensing dips are highly sensitive to change with highest sensitivities at 930 pm/% -160 pm/°C coupler assembled by 3.79and 2.20-μm-diameter fibers. sensitivity can be further improved -1130 smaller fibers diameters 3.50 1.35 μm. To keep stable structure liquid, methodology coating using ethyl cellulose ethoce...
An in-line Mach-Zehnder interferometer based on a dual-tapered photonic crystal fiber (PCF) for bending vector and strain sensing is proposed experimentally demonstrated. This sensor consists of 25.7-cm homemade asymmetric twin-core PCF sandwiched between two tapers. Due to the asymmetry twin cores, opposite directions can be distinguished with maximum sensitivities 18.29 -18.13 nm/m <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-1</sup> ,...
In this paper, an ultrahigh sensitivity sensing in aqueous solution for microfiber modal interferometer (MMI) is realized. The group refractive index (RI) difference between HE11 and HE12 mode will come down to 0 at a certain wavelength, resulting near wavelength. MMI with different diameters have their individual ultrasensitive wavelength band, which indicates the broad range of optional probing more liberal diameter condition on fiber fabrication. experimentation, infrared absorption band...
A compact single-polarization (SP) coupler based on a dual-hollow-core anti-resonant fiber (DHC-ARF) is proposed. By introducing pair of thick-wall tubes into ten-tube single-ring hollow-core fiber, the core separated two cores to form DHC-ARF. More importantly, by tubes, dielectric modes in thick wall are excited inhibit mode-coupling secondary eigen-state polarization (ESOP) between while primary ESOP can be enhanced, and thus coupling length (Lc) greatly increased that reduced several...
The geometrical and physical parameters of phase-shifted sidewall Bragg gratings in a silicon slot waveguide are optimized to possess performance characteristics desirable for integrated optical sensors. By tailoring the spectral response such gratings, highly sensitive compact refractive index sensors detecting resonance wavelength shift or variation light intensity designed with transfer matrix method. Both have minimum detection limit on order 10(-6), linear structure dimension as small...
An ultrasensitive Panda-microfiber (PMF)-based multimode interferometer for salinity measurement is proposed and demonstrated. By inserting a section of PMF supporting few modes into conventional optical fiber system, an inline interference between the high-order PMF, i.e., TE <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">01</sub> TM , realized. The sensitivity as high 2938.16 pm/ <sup xmlns:xlink="http://www.w3.org/1999/xlink">0</sup> /...
An all-fiber Mach-Zehnder interferometer (MZI) for two quasi-continuous points' temperature sensing in seawater is proposed. Based on the beam propagation theory, transmission spectrum designed to present sets of clear and independent interferences. Following this design, MZI fabricated are demonstrated with sensitivities 42.69pm/°C 39.17pm/°C, respectively. By further optimization, sensitivity 80.91pm/°C can be obtained, which 3-10 times higher than fiber Bragg gratings microfiber...
A novel twin-core photonic crystal fiber-based sensor for simultaneous measurement of curvature, strain and temperature is proposed. The fiber constructed by splicing the homemade between two segments single mode fiber. Affected coupling cores, transmission spectrum has different wavelength responses to strain, temperature. maximal sensitivities are 10.89 nm/m-1, 1.24 pm/με 73.9 pm/°C, respectively. Simultaneous can be achieved monitoring shifts selected valleys in spectrum. Contrast...