A5101766054- Photonic Crystal and Fiber Optics
- Advanced Fiber Laser Technologies
- Non-Invasive Vital Sign Monitoring
- Advanced Fiber Optic Sensors
- Photoacoustic and Ultrasonic Imaging
- Spectroscopy and Laser Applications
- Optical Imaging and Spectroscopy Techniques
- Photonic and Optical Devices
- Advanced Chemical Sensor Technologies
- Hemodynamic Monitoring and Therapy
- Optical Network Technologies
- Healthcare Technology and Patient Monitoring
- Hand Gesture Recognition Systems
- Horticultural and Viticultural Research
- Potato Plant Research
- Ovarian function and disorders
- Spectroscopy and Chemometric Analyses
- Gait Recognition and Analysis
- Additive Manufacturing and 3D Printing Technologies
- Adsorption and Cooling Systems
- Fluid Dynamics and Thin Films
- Muscle activation and electromyography studies
- Laser Material Processing Techniques
- Biosensors and Analytical Detection
- Elasticity and Material Modeling
University of Science and Technology of China
2021-2024
Ferring Pharmaceuticals (Switzerland)
2023
University of Michigan–Ann Arbor
1985-2022
Leidos (United States)
2020
Michigan United
2019-2020
Walsh University
2020
Changchun University of Technology
2019
Yunnan Normal University
2006
We demonstrate an all-fiber supercontinuum source that generates a continuous spectrum from 1.6 μm to >11 with 417 mW on-time average power at 33% duty cycle. By utilizing master oscillator amplifier pump three amplification stages and concatenating solid core ZBLAN, arsenic sulfide, selenide fibers, we shift 1550 nm light ∼4.5 μm, ∼6.5 respectively. With 69 past 7.5 this provides both high broad spectral expansion, while outputting single fundamental mode.
We generate a supercontinuum (SC) spectrum ranging from 1.57 μm to 12 (20 dB bandwidth) with soft glass fiber cascade consisting of ZrF4-BaF2-LaF3-AlF3-NaF fiber, As2S3 and As2Se3 pumped by nanosecond thulium master oscillator power amplifier system. The highest on-time average generated is 417 mW at 33% duty cycle. observe near-diffraction-limit beam quality across the wavelength range 3 μm, even though multimode below μm. Our study also shows that parameters such as numerical aperture,...
We demonstrate a prototype mid-wave to long-wave infrared supercontinuum, Fourier transform sensor capable of chemical detection and identification at 3.6 m. The system utilizes 150 mW supercontinuum source with continuous spectrum from 1.6-11 μm an M <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> <; 1.4, 3 λ 11 μm, provide high brightness the target. measure scattering spectra powder particles on soda-lime glass down concentration 7.4...
We demonstrate a Contactless Vital Sign Monitoring (CVSM) system and road-test the for in-cabin driver monitoring using near-infrared indirect Time-of-Flight (ToF) camera. The CVSM measures both heart rate (HR) respiration (RR) by leveraging simultaneously measured grayscale depth information from ToF For camera-based (DMS), key challenges varying background illumination motion-induced artifacts need to be addressed. In this study, active depth-based motion compensation are used mitigate...
Phantom sound perception (tinnitus) may arise from altered brain activity within auditory cortex. Auditory cortex neurons in tinnitus animal models show increased spontaneous firing rates. This be a core characteristic of tinnitus. Functional near-infrared spectroscopy (fNIRS) has shown similar findings human Current fNIRS approaches with cap recordings are limited to ∼3 cm depth signal penetration due the skull thickness. To address this limitation, we present an innovative approach via...
Objective Tinnitus, phantom sound perception, arises from aberrant brain activity within auditory cortex. In tinnitus animal models, cortex neurons show increased spontaneous firing and neural synchrony. humans, similar hyperactivation in has been displayed with functional near-infrared spectroscopy (fNIRS). Resting-state connectivity (RSFC) or between regions also shown using fNIRS. However, current fNIRS technology utilizes infrared (IR)-sources IR-detectors placed on the scalp that...
This study describes a contactless vital sign monitoring (CVSM) system capable of measuring heart rate (HR) and respiration (RR) using low-power, indirect time-of-flight (ToF) camera. The takes advantage both the active infrared illumination as well additional depth information from ToF camera to compensate for motion-induced artifacts during HR measurements. captures how user is moving with respect and, therefore, can be used differentiate where intensity change in raw signal underlying...
We measure glucose solutions down to 1mg/dl based on the C-H combinational bands using a short-wave infrared super-continuum (SWIR-SC) laser. estimate that SWIR-SC increases measurement system SNR by >50x compared with lamps.
With the continuous development of computer vision technology and medical imaging equipment, information contained in images is extremely rich. Therefore, as key point image classification, extraction selection features has become more important. The dimension getting higher higher, so it very important to select effective classify images. In this paper, rheumatoid arthritis (RA) were studied, optical coefficients extracted feature from diffusion tomography (DOT) fingers RA patients. Feature...
Recently, the developed techniques such as magnetic resonant coupling (MRC) and multiple-input multiple-output (MIMO) transmission have significantly improved charging efficiency distance for wireless power transfer (WPT) systems. However, electromagnetic radiation (EMR) safety of is critical in practice while mostly ignored. In this work, we take EMR into account MIMO MRC-WPT We propose a ensured high-efficient scheduling algorithm system (called Shield). Technically, firstly devise simple...
We demonstrate infrared spectroscopy systems that are capable of predicting acrylamide level in powders potato fries based on all-fiber high power supercontinuum (SC) lasers both the short-wave and mid-wave spectral range. Two SC used this study cover wavelength range 670nm to 2500nm 1600nm 11000nm, respectively. use system measure 32 French fry samples with different concentrations calibrated by gas chromatography-mass (GCMS). Our predicted show a good linear correlation measured...
A reflection-interference technique is developed that produces interference fringes by light beams reflected from a droplet surface. The instantaneous size and profile of sessile can be evaluated the height width fringe patterns. method also determine contact angle between substrate.
All-fiber integrated super-continuum (SC) sources are described based on a platform architecture that can operate in the visible, near-infrared, short-wave infrared, mid-wave infrared and long-wave with demonstrated SC wavelengths ranging from 0.47 to 12 μm. Modulation instability initiated generation leads simple source no moving parts uses o_-the-shelf components mature telecommunications fiber optics industry. The resulting light basically cascade of fibers pumped by fiber-pigtailed laser...
We demonstrate a prototype sensor capable of measuring specular and diffuse reflectance spectra from samples 3.6 m away. The utilizes mid-wave to long-wave infrared supercontinuum light coupled into rotational FTIR spectrometer actively probe remote samples. measure the acetaminophen at 41.77 μg/cm<sup>2</sup> on glass substrate find that modified Bobbert-Vlieger analysis can estimate effects particle size distribution return spectra. measured stand-off particulate measurements depends...
Hydrocarbon based thermoplastics used in 3D printing can be sintered using a supercontinuum laser operating between 2-2.5μm. We sinter 11 different materials and fabricate rods with strengths up to 5x of that from CO2 lasers.
WiFi-based gait recognition is an appealing device-free user identification method, but the environment-sensitive WiFi signal hinders it from easy deployment for a new environment. On other hand, Inertial Measurement Unit (IMU) based method could obtain environment-independent features, however, suffers uncomfortable experiences due to device wearing. In this paper, we propose IMFi, novel cross-modal system achieve and at same time. We carefully choose torso foot speed curves as common...
We demonstrate an all-fiber super-continuum (SC) laser based near infrared (1160nm to 2350nm) spectroscopy system that is capable of measuring protein (gluten) levels in wheat flour, at a stand-off distance. show reflectance spectrum between 1160nm and 2350nm can be used measure flour. The measured concentration with the partial least square regression shows good linear correlation (R >0.95) level by Dumas method standard error variance down 0.5 percent. Our could for non-destructive,...
We measure and simulate the diffuse scattering return from sparse particles of RDX, caffeine, acetaminophen deposited on substrates consisting smooth aluminum, silicon, glass at a distance 3.6 m using mid-infrared supercontinuum FTIR sensor. The measured spectra show that molecular fingerprint regime contains reflectance peaks can be used for chemical identification mid-wave infrared provides information target orientation. Furthermore, we demonstrate obtained our sensor accurately simulated...
For monitoring of concussion, brain function, organ condition and other medical applications, what is needed a non-invasive method tissue metabolism. MRI-based functional imaging technology detects changes in blood oxygenation, correlate neural activity, thus may offer prediction prognosis cases concussion cerebral traumas. Yet, potential relationships between perturbations to metabolism patient outcomes cannot be effectively exploited clinically because we lack practical, low-cost, means...
We experimentally measure the scattered reflectance of particles deposited on smooth substrates with a mid-wave to long-wave supercontinuum source and FTIR based sensor at 3.6 m. scattering return from sparse 1,3,5-Trinitroperhydro-1,3,5-triazine, caffeine, acetaminophen aluminum, silicon, glass substrates. also mono-disperse 5.4, 10.8, 19.4 μm diameter polystyrene spheres aluminum. demonstrate that spectra obtained using our can be accurately simulated Bobbert–Vlieger model, non-spherical...
Existing intelligent piano learning systems mainly assist the player by camera, which generally only consider fingering that can reflect performance problem from a limited perspective. Thus, we propose PianoWatch, multi-dimensional assistance system based on wrist wearable devices. PianoWatch extracts more accurate patterns analyzing data microphone, accelerometers and gyroscopes. Then it gives corresponding playing advices, in addition to pitch, including fingering, depth even mood, through...