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We present a standalone dual-comb platform based on two mutually stable waveguide lasers integrated in the same glass chip. Residual fluctuations are compensated using an algorithm seeded only by interferograms, which yields transform-limited spectra.
This paper presents a monolithic three axial electrochemical micro seismic sensor. In response to the vibration along different axes, the outputs of four sensing units are different and through the decoupling of the differences between them formed by different vibration, the vibration along a certain axis can be detected from the mixed one. Because of the decoupling sensing mechanism with four sensing...
This paper presents a two-stage optimization approach to mitigate the rapid voltage fluctuations and minimize the power losses of distribution systems due to the high penetration of photovoltaic (PV) generation. The first stage is a day-ahead optimal strategy which aims to minimize the total voltage deviations and power losses within the constraints of the daily maximum allowable number of operations...
We review and compare recent hollow core photonic crystal fibers, both bandgap-guiding and anti-resonant, which were designed and fabricated for high power laser delivery applications.
Based on the psychological field theory, the stimuli-induced equilibrium point (SIEP) model is formulated to characterize the interaction of a driver between two vehicles (leader and follower) in a three-vehicle platooning configuration. Considering the intensity of the stimuli that act upon a driver between these vehicles, the point at which the stimuli resultant becomes zero (i.e. the equilibrium...
We report the first measurements of spontaneous Raman scattering from a gas sample confined in a Kagome lattice hollow core photonic crystal fibre. We compare the signal strength recorded in this fibre, with that from a similar length of hollow core photonic bandgap fibre and find that, even though the loss of the Kagome fibre is lower, the signal strength in the hollow core photonic bandgap fibre...
Leveraging location information in location-based services leads to improving service utility through geocontextualization. However, this raises privacy concerns as new knowledge can be inferred from location records, such as user's home and work places, or personal habits. Although Location Privacy Protection Mechanisms (LPPMs) provide a means to tackle this problem, they often require manual configuration...
A noninvasive measurement of in situ acoustic intensity is useful in a variety of therapeutic applications such as ultrasound induced drug and gene delivery. Some previously proposed methods assumed other acoustic parameters such as scattering coefficient to be constant. This paper proposed a method free of such restrictions, by estimating all the relevant parameters using the highly nonlinear behaviors...
Ultrasound had been reported to locate the actual in situ focal spot of FUS and to compensate for guidance error due to beam distortion. However it still cannot determine exposure dosage in a clinical setting, therefore monitoring often require MR thermography. The main challenge is that multiple relevant acoustic parameters are not easily isolated from measurable signal characteristics in noninvasive...
We obtain the spatial variation of Green's tensor of lossy resonators in both source and detector positions and orientations without repeated simulation. We construct a simple yet rigorous eigenmode expansion of Green's tensor, bypassing all implementation and interpretation issues associated with the alternative quasinormal eigenmode methods. Modes are defined by a linear eigenvalue problem with...
Hyperspectral imaging (HSI) is a relatively new modality in medicine and can have many potential applications. In this study, we developed label-free hyperspectral imaging for tumor margin assessment. HSI data, hypercube (x,y,λ), consists of a series of images of the same field of view that are acquired at different wavelengths. Every pixel in the hypercube has an optical spectrum. We collected surgical...
Structural and functional neuroimaging studies have indicated that the cortico-striato -thalamo-cortical (CSTC) circuit contributes to the pathophysiology of obsessive compulsive disorder (OCD). As an essential component of CSTC circuit, the dorsal anterior cingulate cortex (dACC) plays an important role for its advanced function in cognition and emotion control. A comprehensive understanding of the...
A bidirectional fiber-IVLLC and fiber-wireless convergence system based on two orthogonally polarized optical sidebands for hybrid CATV/MMW/BB signal transmission is proposed and demonstrated. Two orthogonally polarized optical sidebands are transmitted over a 40-km SMF transport to effectively reduce the fiber dispersion and the distortion. The approach presented in this work signifies the advancements...
Humidity sensing is vital to industries such as medical, manufacturing and agricultural. We demonstrate a responsive optical hygrometer probe based on a polyelectrolyte-coated fiber taper for measuring fast-changing signals. The hygrometer by virtue of its all-optical nature is impervious to electromagnetic interference.
Defects in optical fibers can inflict significant damage, and thus must be detected and repaired/replaced early. Microscopic defects in fibers and their coatings can be detected and radially resolved using a simple angle-resolved interrogator that exploits the contribution of different ray groups.
The existence of projected finger territories (PFTs) near the stump provides an essential way to realize the tactile sensation of lost fingers by transcutaneous electrical nerve stimulation (TENS). After amputation, the somatosensory cortex corresponding to lost fingers might be invaded by other cortical areas due to cortical plasticity. However, it was seldom observed how the amputees could feel...
With the rapid growth of social media and Internet-of-Things, real-time processing of big data has become a core operation in various business areas. It is of paramount importance that big-data analyses are executed timely with specified accuracy guarantees. However, workloads in the wild are highly bursty with skewed contents and often present the conundrum of meeting latency and accuracy requirements...
Photonic semiconductor nanostructure assemblies offer unique possibilities for light manipulation as well as for tailoring light-matter interaction by appropriate choice of their geometrical and material properties. The material-structure combination offers a variety of options for wavelength specific applications, deriving from the electronic properties of semiconductors and optical properties of...
Forward phase-matched Brillouin optomechanical resonance, excited by a tapered fiber, in a graphene inner-deposited whispering-gallery-mode microfluidic cavity, is demonstrated for the first time. The generated Brillouin optomechanical modes with Q factor ∼ 47000 show extremely high sensitivity (200kHz/ppm) for absolute gas detection based on frequency variation, achieving a detection limit down to...
Ge n- and p-FinFETs with different interfacial layer ferroelectric HfZrOx (IL-FE-HZO) gate stacks have been demonstrated systematically by various annealing conditions for the first time. Microwave annealing (MWA) not only shows enhanced FE characteristics but also suppresses the gate leakage and Ge interdiffusion compared with conventional rapid thermal annealing (RTA). While HZO on Al2O3 IL results...
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