East China Normal University

Chongqing Institute of East China Normal University

Roi Optoelectronics Technology Co, Ltd.

Yunnan Huapu Quantum Material Co., Ltd

Chongqing Huapu Scientific Instrument Co., Ltd.

Guangdong Roi Optoelectronics Technology Co., Ltd.

Chongqing Huapu Information Technology Co., Ltd.

Chongqing Huapu Intelligent Equipment Co., Ltd.

Chongqing Huapu Quantum Technology Co., Ltd.

Chongqing Huapu New Energy Co., Ltd.

Shanghai Langyan Optoelectronics Technology Co., Ltd.

Nanjing Roi Optoelectronics Technology Co., Ltd.

Xi'an Institute of Space Radio Technology

Chongqing Menghe Biotechnology Co., Ltd.

Mengyun Hu

Heping Zeng

Chuan Yang

Junyi Nan

Yu Qiao

Ming Yan

Shuai Yuan

Kun Huang

Xiaojun Li

Jinman Ge

Shuang Li

Yinqi Wang

Xiaoyue Wang

Jijun Feng

Tingting Yu

Jianan Fang

Guang Feng

Qinggui Tan

Shencheng Shi

Wei Qiao

Xiao Wang

Shuai Xu

Qingshan Zhang

The present disclosure provides a method of an ultrafast-pulsed laser deposition and a device thereof, wherein a single emitted femtosecond pulse is split, and the split pulses are synchronized in the time domain, and then coupled with each other to form a plasma grating or lattice to excite the target material once; then multiple pulsed lasers are sequentially coupled multiple times with the plasma gratings or lattices to excite the target material multiple times, and the excited target material is deposited and reacted on the substrate to form a thin film.

Method of ultrafast-pulsed laser deposition coupled with plasma lattice and device thereof

A method for producing a conductive glass fiber mesh with laser induced coating graphene comprises: (I) preparing a glass fiber paper coated with a carbon-containing precursor material; (II) subjecting the glass fiber paper coated with the carbon-containing precursor material to laser irradiation to reduce the carbon-containing precursor material into the laser induced coating graphene, obtaining a glass fiber paper coated with the laser induced coating graphene; and (III) folding the glass fiber paper coated with the laser induced coating graphene to obtain the conductive glass fiber mesh with laser induced coating graphene.

Method and device for producing conductive glass fiber mesh with laser induced coating graphene

A high-precision repetition rate locking apparatus for an ultra-fast laser pulse includes: an electronic controlling component comprising: a standard clock, configured to provide a high-precision frequency standard; a pulse generator (PG), configured to provide an electrical pulse signal with adjustable repetition rate, pulse width and voltage magnitude; and a signal generator (SG), connected to the standard clock and the PG, and configured to provide a stable frequency signal for the PG, a phase-shift adjusting component, connected to the electronic controlling component and configured to implement phase modulation through electrically induced refractive index change; a resonant cavity component, comprising a phase shifter, a doped fiber, a laser diode, a wavelength division multiplexer and a reflector, and configured to generate a mode-locked pulse; and a detection system, configured to measure a repetition rate of an output pulse.

High-precision repetition rate locking apparatus for ultra-fast laser pulse

A method for preparing an infrared radiation ceramic material includes mixing and ball milling raw materials of FeO, MnOand CuO in a mass ratio to obtain a mixed powder; pressing the mixed powder; adjusting laser spot, laser power and laser sintering time of a laser; irradiating or sintering by a first laser the pressed mixed powder in a crucible for a high-temperature solid-phase reaction to obtain an ABOtype ferrite powder; obtaining a first mixture by mixing the ABOtype ferrite powder and a cordierite powder in a mass ratio; adding a sintering aid and a nucleating agent for ball milling; obtaining a second mixture by mixing the first mixture and a binder for aging; pressing the second mixture; and irradiating or sintering the pressed second mixture by a second laser to obtain the infrared radiation ceramic material.

Method for preparing infrared radiation ceramic material

A method for preparing a boron carbide material includes: providing raw materials of a boron material, a carbon material and a rare earth oxide, wherein an element molar ratio B:C of the boron material to the carbon material is in a range of 4:1 to 4:7, and the rare earth oxide is in an amount of 5 wt % or less based on a total weight of the raw materials, mixing and milling the raw materials to obtain a mixture, compressing the mixture into a tablet form by a tablet press, and sintering the compressed mixture by a laser, wherein the laser has a laser wavelength of 980 nm, a laser power in a range of 100 to 3000 W, and a laser irradiation time of 3 to 60 s.

Method for preparing boron carbide material

A pulsed laser deposition method is provided. The method includes emitting a plurality of groups of femtosecond pulses, focusing the plurality of groups of femtosecond pulses into a plurality of groups of femtosecond filaments by lenses, and cross-coupling the plurality of groups of femtosecond filaments to form n beams of plasma gratings; exciting a target material by using a first plasma grating; and adjusting angles of the lenses and time delay between a plurality of beams of femtosecond pulses; coupling and splicing a second plasma grating with the first plasma grating along a grating pattern of the first plasma grating, until a nplasma grating is coupled and spliced with a (n−1)plasma grating along a grating pattern of the (n−1)plasma grating to form a plasma grating channel; and exciting the target material by using the plasma grating channel to complete deposition on a substrate.

Pulsed laser deposition method

A method for processing a chip based on deep learning and an apparatus for processing a chip based on deep learning are provided. The method includes scanning the chip with femtosecond laser in a predetermined polarization state to produce a main scanning trajectory and periodic nano-stripes on both sides of the main scanning trajectory, so as to form a nano-ridge structure on a surface of the chip; obtaining a super-resolution microscopic image of the nano-ridge structure by super-resolution microscopy; obtaining a target image; reconstructing the target image based on deep learning for image super-resolution to obtain the reconstructed image, and recognizing and processing the reconstructed image to obtain characteristic parameters of the nano-ridge structure as input parameters for deep learning for femtosecond laser processing; adjusting processing parameters of the chip according to the output values of the deep learning model for femtosecond laser processing; and outputting the optimized nano-ridge structure.

Method and apparatus for processing chip based on deep learning

A laser velocimetry method and system are provided. In the method, an ultrashort pulse laser is subjected to temporal broadening, beam splitting and spectrum broadening in sequence to from a three-dimensional measurement space. When an object moves in the measurement space, a first signal light s_, a second signal light s_, a third signal light s_are generated, based on which velocity components v, v, and vof the target object can be obtained, respectively, so as to obtain the velocity of the object in accordance with a formula of v=v·i+v·j+v·k.

Ultra-high speed time-frequency fourier laser velocimetry method and system

A mid-infrared upconversion imaging method and a mid-infrared upconversion imaging device are provided, which are used for imaging detection in a mid-infrared wavelength band, and related to a technical field of infrared imaging. The method includes directing pump laser and mid-infrared light into a chirped crystal component located in an optical cavity to obtain visible light; and imaging an object with the visible light.

Mid-infrared upconversion imaging method and device

A processing method and apparatus for ultrafast laser deposition of a multilayer film including a diamond-like carbon film, an anti-reflection film and an anti-fingerprint film includes: generating primary plasma by first excitement on a target material with a femtosecond or picosecond pulsed laser beam as a pre-pulse; and generating secondary plasma by second excitement on the target material under plasma grating, formed by allowing two femtosecond pulsed laser beams to intersect at a small include angle for interaction in the primary plasma, for deposition to coat a film.

Processing method and apparatus for ultrafast laser deposition of multilayer film including diamond-like carbon film, anti-reflection film and anti-fingerprint film

A multipulse-induced spectroscopy method based on a femtosecond plasma grating includes: pre-exciting a sample on a stage by providing a femtosecond pulse to form the femtosecond plasma grating; providing a post-pulse on the sample at an angle to excite the sample to generate a plasma, wherein the post-pulse comprises one or more femtosecond pulses, there is a time interval between the femtosecond pulse and the post-pulse, and the time interval is less than a lifetime of the femtosecond plasma grating; and receiving and analyzing a fluorescence emitted from the plasma to determine element information of the sample.

Multipulse-induced spectroscopy method and device based on femtosecond plasma grating

A method for manufacturing a large-area volume grating includes: (1) splitting a laser beam into two or more laser beams, converging the two or more laser beams into a sample at an angle less than 60° to form a first plasma grating; (2) moving the sample in a longitudinal direction of a plane vertical to the first plasma grating to etch out a first prefabricated volume grating; (3) moving the sample laterally to form a second plasma grating, an effective cross section of the first prefabricated volume grating partially overlapping with that of the second plasma grating, then moving the sample in a longitudinal direction of a plane vertical to the second plasma grating to etch out a second prefabricated volume; and (4) repeating steps (2) and (3) n times to obtain a volume grating in any size.

Method for manufacturing large-area volume grating via plasma grating direct writing

A method for film coating by pulsed laser deposition with a plasma grating includes: in step 1, providing a substrate and a target material; in step 2, generating a femtosecond pulsed laser beam which is split by a beam splitting module so as to form a plurality of femtosecond pulsed laser sub-beams; in step 3, performing a first excitation on the target material by one of the split femtosecond pulsed laser sub-beams as a pre-pulse after focus, to generate a first plasma; in step 4, synchronizing the rest of the split femtosecond pulsed laser sub-beams as post-pulses to form, after focus, filaments arriving at a surface of the target material simultaneously, to generate the plasma grating; and in step 5, performing a secondary excitation on the target material by the generated plasma grating to generate a second plasma depositing on the substrate to form the film.

Method for coating film by pulsed laser deposition with plasma grating

A detection method based on laser-induced breakdown spectroscopy enhanced by a two-dimensional plasma grating includes: generating a femtosecond laser pulse by a femtosecond laser, and splitting the femtosecond laser pulse into three sub-pulses by a beam splitting unit; focusing the three sub-pulses separately by a focusing unit to allow focused sub-pulses to be overlapped at an intersection in space, wherein before reaching the intersection, the three sub-pulses form two planes; synchronizing the three sub-pulses in a time domain by adjusting optical paths of the three sub-pulses in such a way that they have the same optical length and the three sub-pulses arrive at the intersection in space simultaneously and form the two-dimensional plasma grating; and exciting a sample on a stage based on the two-dimensional plasma grating to generate a plasma cluster, and acquiring a spectrum of the sample.

Detection method and device based on laser-induced breakdown spectroscopy enhanced by 2D plasma grating

A method for processing a micro-channel of a micro-fluidic chip using multi-focus ultrafast laser, in which an array-type multi-focus femtosecond laser is used to perform fractional ablation on the micro-fluidic chip, and then pulse laser is used to perform secondary ablation on the micro-fluidic chip. Ultrasonic-assisted hydrofluoric acid etching is performed on the micro-fluidic chip after ablation to obtain a true three-dimensional micro-channel on the micro-fluidic chip. A device for processing a micro-channel of a micro-fluidic chip using multi-focus ultrafast laser is also provided.

Growing community of inventors

Chongqing, China

Mengyun Hu