Abstract: Provided are an imaging method and system for residual stress of a basin insulator and a method for preparing a test block. The imaging method includes cutting and preparing a standard industrial sample of a basin insulator and testing the acoustoelastic coefficient of the standard industrial sample; then obtaining the residual stress data of the basin insulator and obtaining the spatial point sound velocity distribution of the basin insulator; finally, obtaining a stress distribution cloud map of the basin insulator by calculation of the attribute value and the coordinate data of a to-be-measured location, and performing reliability verification based on the residual stress data.

Abstract: Provided are an imaging method and system for residual stress of a basin insulator and a method for preparing a test block. The imaging method includes cutting and preparing a standard industrial sample of a basin insulator and testing the acoustoelastic coefficient of the standard industrial sample; then obtaining the residual stress data of the basin insulator and obtaining the spatial point sound velocity distribution of the basin insulator; finally, obtaining a stress distribution cloud map of the basin insulator by calculation of the attribute value and the coordinate data of a to-be-measured location, and performing reliability verification based on the residual stress data.

Abstract: The present disclosure provides a defect detection method and apparatus for a cushion layer of a cable, a device, and a storage medium. The method includes: obtaining specification parameters of a corrugated sheath of a to-be-detected cable, calculating a first volume of a cushion layer without deformation and a second volume of a deformed portion of the cushion layer when the cushion layer is deformed under stress, and calculating a stressed-state deformation ratio of the cushion layer based on the first volume and the second volume; obtaining a voltage, a current, an electrode area, an electrode distance, and an initial electrode distance of the cushion layer when the stressed-state deformation ratio is reached, and calculating volume resistivity of the cushion layer; and comparing the volume resistivity with a preset evaluation parameter to obtain a defect detection result of the cushion layer.

Abstract: Defect detection method for a semi-conducting bedding layer of a power cable includes: obtaining a length parameter, a corrugation pitch parameter, radius parameters, and a thickness parameter of a power cable; obtaining a first resistance value between a shield and a corrugated sheath, and calculating a second resistance value of the shield based on the length parameter and the corrugation pitch parameter; calculating a radial resistance value of the semi-conducting bedding layer based on the first resistance value and the second resistance value; determining a contact angle of a critical point of contact between the corrugated sheath and the semi-conducting bedding layer based on the radius parameters and the thickness parameter; calculating volume resistivity of the semi-conducting bedding layer based on the radial resistance value and the contact angle; and comparing the volume resistivity with a preset evaluation parameter to obtain a defect detection result of the semi-conducting bedding layer.

Abstract: Defect detection method for a semi-conducting bedding layer of a power cable includes: obtaining a length parameter, a corrugation pitch parameter, radius parameters, and a thickness parameter of a power cable; obtaining a first resistance value between a shield and a corrugated sheath, and calculating a second resistance value of the shield based on the length parameter and the corrugation pitch parameter; calculating a radial resistance value of the semi-conducting bedding layer based on the first resistance value and the second resistance value; determining a contact angle of a critical point of contact between the corrugated sheath and the semi-conducting bedding layer based on the radius parameters and the thickness parameter; calculating volume resistivity of the semi-conducting bedding layer based on the radial resistance value and the contact angle; and comparing the volume resistivity with a preset evaluation parameter to obtain a defect detection result of the semi-conducting bedding layer.

Abstract: An optical multiplexing system comprises a wavelength division multiplexing (WDM) device, an incoming light input to the WDM device, and an exiting light output from the WDM device. The WDM device comprises a WDM filter, an incident light is incident at the WDM filter having an incident angle at the WDM filter. The incident light is partially transmitted through the WDM filter and partially reflected from the WDM filter. An angle formed by the incoming light and the exiting light is larger than twice of the incident angle at the WDM filter.

Abstract: A DeMux/Mux module comprises a first submodule comprising a first fiber and a second fiber disposed symmetrically about a first optical axis of the first submodule, a first lens and a first WDM filter attached to the first lens, A first incident light is incident on the first WDM filter. Light having a first transmitted wavelength is transmitted through the first WDM filter and is output from the second fiber. Light having wavelengths other than the first transmitted wavelengths is reflected from the first WDM filter, and input to a second submodule through light propagation in free space.

Abstract: A fiber laser oscillator comprises an active fiber for providing a lasing light having a selected wavelength band, a saturable absorber assembly coupled to a first end of the active fiber, a pump source for providing a pump light having wavelengths except the selected wavelength band, an optical component coupled to the second end of the active fiber and the pump source. The optical component comprises a thin film filter for transmitting the lasing light for a first time and reflecting the pump light and a reflector for reflecting the lasing light transmitted for the first time through the thin film filter. The lasing light reflected by the reflector transmits through the thin film filter for a second time and overlaps with the pump light reflected by the thin film filter.

Abstract: A package structure for welding powder has a casing and a casing cover. The casing cover is deposited on the cover. The casing and the casing cover are made of metallic copper. The casing cover has a protruding segment being cylindrical and formed on a bottom surface of the casing cover, and a mounting recess being round and formed in a top surface of the casing cover corresponding to the protruding segment for storing fine welding powder. The package structure has a fire strip deposited on the top surface of the casing cover and extending into the mounting recess via a top opening of the mounting recess, and a sealing sheet deposited on the top surface of the casing cover to hold the fire strip securely with the casing cover and seal the top opening of the mounting recess.

Abstract: A multiple channel fiber pigtailed acousto-optic (AO) device comprises: a first multiple fiber collimator pigtail comprising a plurality of input fibers, a second multiple fiber collimator pigtail comprising a plurality of output fibers, wherein each of the plurality of output fibers is a conjugate of each of the plurality of input fibers, respectively, and an acousto-optic modulator (AOM) disposed between the first multiple fiber collimator pigtail and the second multiple fiber collimator pigtail, wherein the input fibers form input ports providing input beams to the AOM and the output fibers form output ports receiving output beams from the AOM, wherein at least one output fiber of the plurality of output fibers is coupled to an input fiber of the plurality of input fibers.

Abstract: Provided are an antenna system, an integrated communication structure and a terminal. The antenna system comprises: a first antenna which is connected to transmission paths of a plurality of communication modules and used for transmitting transmission signals from each of the transmission paths; and a second antenna which is connected to receiving paths of the plurality of communication modules and used for transmitting a received signal from the outside to a corresponding communication module via a corresponding receiving path. By means of the technical solution of the present invention, transmitting antennas and reception antennas of all communication modules in a terminal can be integrated respectively. The number of antennas can be effectively reduced, and the stacking difficulty is reduced, thereby avoiding antenna interference among a plurality of communication devices, and making it easy to realize multi-mode.

Abstract: A method and system for creating non-parallax panoramic images from a plurality of individual images, in real-time is provided. Specifically, the present invention provides a system and method configured to combine individual overlapping medical images into a single undistorted panoramic image in real-time as an imaging device traverses over a patient. In particular, the present invention provides a system and method for combining individual x-ray images into a single clinical panoramic image for use with a traversing G-arm device.

Abstract: A multiple channel fiber pigtailed acousto-optic (AO) device comprises: a first multiple fiber collimator pigtail comprising a plurality of input fibers, a second multiple fiber collimator pigtail comprising a plurality of output fibers, wherein each of the plurality of output fibers is a conjugate of each of the plurality of input fibers, respectively, and an acousto-optic modulator (AOM) disposed between the first multiple fiber collimator pigtail and the second multiple fiber collimator pigtail, wherein the input fibers form input ports providing input beams to the AOM and the output fibers form output ports receiving output beams from the AOM, wherein at least one output fiber of the plurality of output fibers is coupled to an input fiber of the plurality of input fibers.

Abstract: A package structure for welding powder has a casing and a casing cover. The casing cover is deposited on the cover. The casing and the casing cover are made of metallic copper. The casing cover has a protruding segment being cylindrical and formed on a bottom surface of the casing cover, and a mounting recess being round and formed in a top surface of the casing cover corresponding to the protruding segment for storing fine welding powder. The package structure has a fire strip deposited on the top surface of the casing cover and extending into the mounting recess via a top opening of the mounting recess, and a sealing sheet deposited on the top surface of the casing cover to hold the fire strip securely with the casing cover and seal the top opening of the mounting recess.

Abstract: A multipass fiber amplifier comprises a micro-optic-module polarization separating device including a first ASE blocking device, a micro-optic-module 90° polarization rotating reflector including a second ASE blocking device, a pump source for providing pump light; a micro-optic-module wavelength-division multiplexer (WDM) for combining the pump light and the laser beam; and a gain fiber having a first end and a second end for amplifying the laser beam using the pump light, where the first ASE blocking device is coupled to the first end of the gain fiber and the second ASE blocking device is coupled to the second end of the gain fiber.

Abstract: A fiber coupled modular laser system comprises a laser oscillator, at least one fiber pre-amplifier, and at least one free space solid state power amplifier. The output of the laser oscillator is fiber coupled with the input of the at least one fiber pre-amplifier or the at least one free space solid state power amplifier. The output or the input of the at least one fiber pre-amplifier is fiber coupled with the input or the output of the at least one free space solid state power amplifier.

Abstract: A fiber laser oscillator comprises an active fiber for providing a lasing light having a selected wavelength band, a saturable absorber assembly coupled to a first end of the active fiber, a pump source for providing a pump light having wavelengths except the selected wavelength band, an optical component coupled to the second end of the active fiber and the pump source. The optical component comprises a thin film filter for transmitting the lasing light for a first time and reflecting the pump light and a reflector for reflecting the lasing light transmitted for the first time through the thin film filter. The lasing light reflected by the reflector transmits through the thin film filter for a second time and overlaps with the pump light reflected by the thin film filter.

Abstract: A multipass fiber amplifier comprises a micro-optic-module polarization separating device including a first ASE blocking device, a micro-optic-module 90° polarization rotating reflector including a second ASE blocking device, a pump source for providing pump light; a micro-optic-module wavelength-division multiplexer (WDM) for combining the pump light and the laser beam; and a gain fiber having a first end and a second end for amplifying the laser beam using the pump light, where the first ASE blocking device is coupled to the first end of the gain fiber and the second ASE blocking device is coupled to the second end of the gain fiber.

Abstract: An apparatus and method for multipass fiber amplifier comprises: (a) first passing a laser beam having a first linear polarization in the fiber amplifier in a first direction, (b) rotating the first linear polarization of the laser beam to a second linear polarization, the second linear polarization is perpendicular to the first linear polarization, (c) second passing the laser beam having the second linear polarization in the fiber amplifier in a second direction, the second direction is opposite to the first direction, (d) third passing the laser beam having the second linear polarization in the fiber amplifier in the first direction, the laser beam having the second linear polarization is reflected by a polarization separating device and a mirror, (e) rotating the second linear polarization of the laser beam to the first linear polarization, and (f) fourth passing the laser beam having the first linear polarization in the fiber amplifier in the second direction.

Abstract: Provided are an antenna system, an integrated communication structure and a terminal. The antenna system comprises: a first antenna which is connected to transmission paths of a plurality of communication modules and used for transmitting transmission signals from each of the transmission paths; and a second antenna which is connected to receiving paths of the plurality of communication modules and used for transmitting a received signal from the outside to a corresponding communication module via a corresponding receiving path. By means of the technical solution of the present invention, transmitting antennas and reception antennas of all communication modules in a terminal can be integrated respectively. The number of antennas can be effectively reduced, and the stacking difficulty is reduced, thereby avoiding antenna interference among a plurality of communication devices, and making it easy to realize multi-mode.