Abstract: Disclosed are a detection mechanism, a radio-frequency ablation catheter, and a radio-frequency ablation system. The radio-frequency ablation catheter includes a handle portion, a needle tube portion, a central electrode, and a detection mechanism. The needle tube portion includes a first tube and a second tube, the handle portion includes a cylinder sleeve and a sliding button, the central electrode includes an electrode body, an electrode wire, and an electrode connector, and the detection mechanism includes a fixing base, a pulling string, a connecting base, and multiple detection electrodes arranged in a claw-shaped configuration. A distal end of the pulling string is fixed to the fixing base, and a proximal end of the pulling string is fixed to the sliding button; and the detection electrodes are fixed to the fixing base, and slidably provided in the connecting base.

Abstract: An optical transceiver may include an optical transmitter and an optical receiver. The optical transmitter and receiver may each include a grid including one or more lanes spaced apart. Each lane may correspond to a predetermined optical signal, or wavelength. The optical transmitter may include one or more sets of lasers to output one or more optical signals corresponding to the grid. Each set of laser may output a set of optical signals. Each set of lasers and, therefore, each set of optical signals may have a different passband. For example, the multiplexing and/or demultiplexing architecture may have a wide passband for the first set of optical signals and a narrow passband for the second set of optical signals. The narrow passband may be determined based on the space between two wider passbands.

Abstract: A method is provided for gathering probe data and using the gathered data to creating map intersection turn paths. Methods may include: receiving probe data from a plurality of probes passing through an intersection; identifying a turn maneuver of the intersection including at least an incoming and an outgoing road link; map matching probe data from the plurality of probes passing through the intersection to the turn maneuver, where probe data map matched to the turn maneuver includes turn maneuver probe data; identifying a plurality of seed points, where the plurality of seed points are iteratively created from the turn maneuver probe data; generating a curve representing a geometric shape of a turn path corresponding to the turn maneuver using the seed points; fitting a spline to vertices of the curve representing a geometric shape of the turn path; and providing for guidance of a vehicle based on the spline of the turn path.

Abstract: A multifunctional photonic integrated circuit (PIC) suitable for the manufacture of fiber optic gyroscopes (FOG) is described. The PIC is constructed and arranged to exhibit a scale factor of substantially high stability and accuracy. The PIC may comprise, for example, a high optical birefringence and low propagation loss waveguide, a low wavelength-dependent split-ratio Y-junction, a high extinction ratio linear polarizer, and high efficiency fiber-to-waveguide mode-size converters. Considerations for ensuring high-level FOG performance are addressed by, for example, optimization of waveguide structure, functional requirements for individual components, and combined effects of the circuit layout. A high-end, tactical grade FOG may be built using the disclosed PIC, after connecting to polarization maintaining optical fiber coil, a light source, and a photodetector.

Abstract: A lung tumor ablation method includes deploying a plurality of sensors in the tumor margin and monitoring ablation progress based on information from the sensors. An ablation electrode is inserted into a central region of the tumor and the site is irrigated. Power and irrigation flowrate are controlled to optimize ablation based on information from the sensors. Related apparatus and systems are described.

Abstract: Systems and methods for the detection and analysis of curvature data are described. A method includes: receiving position data of a vehicle turning maneuver along a portion of a roadway, where the position data includes measured position data collected by sensors of a vehicle while traversing the vehicle turning maneuver; associating the received position data with map data of the portion of the roadway; generating a spline based on the position data, the spline being a smooth curve representing the vehicle turning maneuver from a first road segment to a second road segment; identifying a segment of the spline containing a turning point of the vehicle turning maneuver, the turning point representing a change of a vehicle path from along the first road segment to along the second road segment; and determining a maximum curvature value for the identified segment of the spline.

Abstract: A fumaric acid pour point depressant for crude oil and a preparation method therefor are provided. The fumaric acid pour point depressant is obtained by polymerizing a first prepolymer, a second prepolymer, a third monomer and a fourth monomer, where the first prepolymer is obtained by pre-polymerizing vinyl acetate and a first monomer; and the second prepolymer is obtained by pre-polymerizing fumaric acid and a second monomer.

Abstract: A computer system to authorize a first endpoint to access enterprise digital resources is provided. The computer system includes the first endpoint, a second endpoint, and an endpoint management service being executed in a server. The endpoint management service communicates with the first endpoint via the second endpoint. For example, the endpoint management service receives authentication credentials from the first endpoint via the second endpoint. Similarly, the endpoint management service, upon verification of the authentication credentials, transmits an authorization token to the first endpoint via the second endpoint. The first endpoint, upon receiving and deploying the authorization token, can execute enterprise managed application programs and can access enterprise digital resources. In some examples, both the first and second endpoints are owned and/or used by a same user.

Abstract: An integrated optical polarizer for generating linear polarizing light may be formed in a photonic integrated circuit (PIC) for applications that require stable output state of polarization. The integrated polarizer may be built by using the same materials already present in the PIC without use of other additional layers and claddings, and without other additional structural modification to the waveguide profile. The integrated polarizer comprises a plurality of bending waveguides of a pre-determined radius that are connected to each other in sequence. The bending waveguide has a high birefringence and a loose confinement to conduct one polarization mode and attenuate the other polarization mode. The polarization discrimination is controlled with the degree of the mode confinement, the bending radius, and the number of the bending waveguides that are connected in series.

Abstract: A system for stabilizing a scale factor associated with an optic rotation sensor comprises an optic rotation sensor that generates an optic signal in response to a rotation of the optic rotation sensor. A sensor detection system produces a rotation signal as a function of the optic signal and rotation of the optic rotation sensor. A first waveguide guides a portion of the optic signal for an interaction length, and produces a first processed optic signal. A second waveguide receives a portion of the optic signal from first waveguide through evanescent coupling, and produces a second processed optic signal. A wavemeter detector receives the optic signals and measures the effective interferometric wavelength (EIW) of the light based on the optic signals. A scale factor correction system receives the rotation signal and the EIW, and measures the correct rotation signal by processing the rotation signal and the EIW.

Abstract: The present disclosure provides a method for manufacturing a low loss ferrule assembly having prefabricated optical fibers, a low loss ferrule assembly having prefabricated optical fibers manufactured according to the method and an optical fiber fixing mold for manufacturing the ferrule assembly, wherein a method for manufacturing a high-precision ferrule assembly comprises: disposing both ends of a plurality of optical fibers within a plurality of grooves at both ends of an optical fiber fixing mold, such that the plurality of optical fibers maintain a specific distance therebetween; disposing the plurality of optical fibers within a housing, and causing the plurality of optical fibers to be fixed relative to the housing, wherein the housing is of a split type; cutting and polishing the optical fibers at a first side of the housing. The solution provided by the present disclosure implements the ferrule assembly of the high-precision optical fiber connector with low costs.

Abstract: A photonic integrated circuit chip includes a substrate and a wafer on the substrate. The wafer itself includes a photonic grating coupler with a taper portion and grating features. The grating features extend from the taper portion toward the substrate.

Abstract: The present disclosure discloses a modular hardened optical fiber connector and an assembly method thereof. The modular hardened optical fiber connector comprises: a ferrule stub module which comprises a pre-installed optical fiber; an optical cable holding module which comprises an optical drop fiber of an optical drop cable; an optical fiber protection module which is arranged around a connection portion between the pre-installed optical fiber and the optical drop fiber; an inner housing module which accommodates the ferrule stub module, the optical cable holding module and the optical fiber protection module therein; and an outer housing module which accommodates the inner housing module therein.

Abstract: An optical fiber testing device (300) being plugged into a port at which optical signals including communication and test signals within different wavelength bands being received, comprises an optical connector (304) including a plug body surrounding a ferrule holding an optical fiber (301) and a reflector component (326) carried with the optical connector (304). The reflector component (326) is optically coupled to the rear of the optical fiber and reflects the test signal. A method for testing an optical fiber, comprises removably securing a reusable ruggedized optical fiber testing device to a ruggedized port of an optical fiber terminal to optically couple to an optical fiber under test, transmitting a test signal over the optical fiber under test, and using the reflector component to return the test signal over the optical fiber under test when receiving the test signal.

Abstract: Pandemic COVID 19 causes global crisis in human health and economy. The pathogen of COVID 19, like the Influenzas causing common flus, belongs to a common type of virus called Ribonucleic Acid (RNA) virus. RNA viruses are composed of three structural components: genomic RNA, envelop and nuclear proteins, and bilayer lipid membrane. Targeting COVID 19 and all RNA viruses, the present invention describes an effective disinfectant system, which applies the combination of RNases, proteases, and detergents, at a broad range of concentration, pH, and temperature in the utilization, to eliminate the RNA viruses from any contaminated surfaces, airways, and filters. The disinfectant system provides an effective, convenient, environment friendly, and safe solution, for commercial and customer use, to disinfect RNA virus pathogens in concern.

Abstract: A fiber optic connection assembly for fiber to the home, comprising: a fan-out member; a multi-fiber optical cable having a first end introduced into the fan-out member and a second end extending out of the fan-out member; a multi-fiber optic connector connected to the second end of the multi-fiber optical cable; a plurality of single-fiber optical cables each having a first end introduced into the fan-out member and spliced with a respective one of fibers of the multi-fiber optical cable and a second end extending out of the fan-out member; and a plurality of single-fiber optic connectors connected to the second ends of the single-fiber optical cables, respectively; a plurality of first fiber optic adapters mated with the plurality of single-fiber optic connectors, respectively; and a plurality of outer shields each constructed to receive the connector and the adapter of a respective single-fiber optical cable therein, wherein the outer shield is hermetically fitted on the connector and the adapter of the re