26 results about "Resonance fluorescence" patented technology

The invention provides an ore grade analysis method. The ore grade analysis method comprises the following steps: generating an X-ray beam by utilizing a radiation source; x-ray beams are utilized to irradiate the ore, target element nuclides in the ore are excited to generate a nuclear resonance fluorescence effect, target characteristic gamma rays are emitted, and the energy of the X-ray beams is higher than the excitation energy of the target element nuclides; when the X-ray beam is utilized to irradiate the ore, a standard sample containing a reference nuclide is irradiated, the reference nuclide is excited to emit a reference characteristic gamma ray, and the reference nuclide is expressed as a nuclide with known content and known characteristic gamma ray energy; detecting the energy of a target characteristic gamma ray and the energy of a reference characteristic gamma ray; and determining the grade of the target element in the ore based on the energy of the target characteristic gamma ray and the energy of the reference characteristic gamma ray.

Techniques for performing readout and reset of fluxonium qubits are disclosed. When fluxonium hardware components are coupled to a quantum metamaterial through a readout resonator, said components may be dispersively coupled such that a quantum state of the corresponding fluxonium qubit is read out through the quantum metamaterial, and then the state of the fluxonium qubit is subsequently reset in order to proceed with a quantum computation to be performed. Alternatively, when fluxonium hardware components are coupled directly to a quantum metamaterial, a quantum state of a fluxonium qubit is read out using resonance fluorescence, and then may be subsequently reset back to its ground state, also using resonance fluorescence. A width of a passband of the quantum metamaterial, along with frequencies of the control sequences used, may be tuned such that either readout or reset is selectively activated.

The invention belongs to the technical field of laser radars, and discloses a laser generation device and method of an iron resonance fluorescence Doppler laser radar. The first seed source and the second seed source respectively output continuous light; after the first laser processor carries out power amplification, frequency multiplication, frequency stabilization and frequency beating on the continuous light, the central wavelength of the continuous light is adjusted in real time; the second laser processor performs beam combination and beat frequency on the continuous light adjusted by the first seed source and the continuous light emitted by the second seed source, locks the phase of a difference frequency signal on an external radio frequency signal, and controls the radio frequency signal to circularly jump in a certain interval; and the pulse laser performs amplification and nonlinear frequency conversion on the continuous light emitted by the locked second seed source, outputs single-frequency stable-frequency narrow-band pulse laser, and realizes time-sharing frequency hopping output of the pulse light among three frequencies at the same time. The laser generating device provides a reliable light source for high-precision detection of the atmospheric temperature, the wind field and the iron atom number density of the area from the top of the middle layer to the bottom of the thermal layer.

A full-reception light path of a small-aperture single-atom filter of a resonance fluorescence laser radar and a detection method, applied to the technical field of laser radars. The full-reception light path comprises: a front light path assembly (100) used for collimating and converging a light beam and decomposing the light beam into a first light beam and a second light beam, wherein the polarization directions of the first light beam and the second light beam are perpendicular to each other, the divergence angle of the collimated light beam is smaller than a first preset angle, the divergence angle of the converged light beam is smaller than a second preset angle, and the first preset angle is smaller than the second preset angle; a polarized light path assembly (200), comprising a first light path assembly (210) and a second light path assembly (220), which are respectively used for transmitting the first light beam and the second light beam to a rear light path assembly (300) so as to filter out noise light in the first light beam; and the rear light path assembly (300) used for simultaneously detecting the first light beam and the second light beam after the noise light has been filtered out.

Techniques for performing readout and reset of fluxonium qubits are disclosed. When fluxonium hardware components are coupled to a quantum metamaterial through a readout resonator, said components may be dispersively coupled such that a quantum state of the corresponding fluxonium qubit is read out through the quantum metamaterial, and then the state of the fluxonium qubit is subsequently reset in order to proceed with a quantum computation to be performed. Alternatively, when fluxonium hardware components are coupled directly to a quantum metamaterial, a quantum state of a fluxonium qubit is read out using resonance fluorescence, and then may be subsequently reset back to its ground state, also using resonance fluorescence. A width of a passband of the quantum metamaterial, along with frequencies of the control sequences used, may be tuned such that either readout or reset is selectively activated.

Preparation method and application of a photodynamic / ferroptosis nano metal-organic diagnostic and therapeutic agent guided by magnetic resonance / fluorescence imaging. In this method, polyethylene glycol is used as a surfactant, and a water-soluble nano metal-organic framework compound (PEG-MOF) is prepared by a simple one-step method. The water-soluble PEG-MOF nano-probe is efficiently enriched at the breast cancer site by virtue of the long-circulation effect of PEG in the blood and the enhanced permeability and retention (EPR) effect of the nano-material, and the tumor location is accurately determined by means of T1 magnetic resonance and fluorescence multimodal imaging techniques. Under the irradiation of near-infrared light, PEG-MOF synergistically performs photodynamic therapy to induce the occurrence of ferroptosis in tumor cells. The water-soluble PEG-MOF has the advantages of simple preparation method, good repeatability, safe operation, low economic cost, etc., and has strong clinical potential in the diagnosis and treatment of breast cancer, and is expected to provide new ideas for the early clinical diagnosis and precise treatment of breast cancer.

The invention belongs to the technical field of environmental monitoring, and discloses a hydroxyl radical online generation and reference inspection method and device and application, and the device comprises a laser splitting unit, a laser collimation and focus lens group, a laser incident cavity, a reference cavity, a laser emergent cavity and an atmospheric hydroxyl radical measurement cavity. The device not only can continuously and stably generate high-concentration hydroxyl radicals, but also can monitor resonance fluorescence signals generated by the hydroxyl radicals in real time, has the advantages of high signal-to-noise ratio, low cost, good adaptability, stable and reliable operation and the like, and can be used as a key core component of a free radical measurement system by a laser-induced fluorescence method. The method not only can be directly applied to dye laser wavelength monitoring and locking, but also can be applied to dye laser wavelength calibration instead of a wavemeter.

The invention belongs to the technical field of laser radars, and discloses an iron resonance fluorescence Doppler laser radar system. A seed injection mode is adopted, single-longitudinal-mode and frequency-stabilized seed light with certain power is injected into an oscillation stage unit, accurate matching of the frequency of the seed light and the longitudinal-mode frequency of an oscillation stage is completed through an active cavity control technology, and the oscillation stage can output Q-switched pulses with good transverse-mode characteristics and frequency characteristics. And then the Q-switched pulse is subjected to power amplification by adopting an MOPA configuration in an amplification stage unit, and single-longitudinal-mode narrow-linewidth laser output under a specific wavelength is realized through two times of nonlinear frequency conversion. The system takes iron atoms in the atmosphere as tracers, and can perform high-precision detection on the atmospheric temperature, the wind field and the iron atom number density in the area from the top of the middle layer to the bottom of the thermal layer.

The application discloses a full-polarization resonant fluorescence laser radar ultra-narrow band filter and relates to the technical field of laser radar detection. The full-polarization resonant fluorescence laser radar ultra-narrow band filter comprises a first polarization beam splitter, a single-atom vapor cell, a working parameter control device, first and second polarized light optical paths, a plurality of relay lenses and a beam combiner. The optical paths guide the first and second polarized light to be incident from two sides of the single-atom vapor cell in opposite directions, the optical path length of the second polarized light optical path is longer than that of the first polarized light optical path, and the plurality of relay lenses are configured to compensate for the optical path difference, so that the two polarized lights have consistent beam parameters when entering the vapor cell. The single-cell opposite incidence and optical path compensation are adopted, the problems of inconsistent parameters in the double-cell scheme and large energy loss in the single-cell scheme in the prior art are solved, and efficient filtering of full-polarization signals under consistent physical conditions is ensured.

The invention discloses a full-polarization resonance fluorescence laser radar ultra-narrow band filter, and relates to the technical field of laser radar detection. The system comprises a first polarization beam splitter, a monatomic steam pool, a working parameter control device, a first polarized light path, a second polarized light path, a plurality of relay lenses and a beam combiner. The light path guides the first polarized light and the second polarized light to oppositely enter from the two sides of the monatomic steam pool, the light path of the second polarized light path is longer than that of the first polarized light path, and the relay lenses are configured to compensate the light path difference, so that the two beams of polarized light have consistent light beam parameters when entering the steam pool. Single-cell opposite incidence and optical path compensation are adopted, the problems that in the prior art, parameters of a double-cell scheme are inconsistent, and energy loss of a single-cell scheme is large are solved, and efficient filtering of full-polarization signals under consistent physical conditions is guaranteed.

A light-emitting layer, a light-emitting device and a light-emitting apparatus are provided. The light-emitting layer includes a thermally activated delayed fluorescence (TADF) material, a phosphorescent material, a multiple resonance fluorescent material and a host material.

The application belongs to the technical field of environmental monitoring, and discloses a hydrogen-oxygen radical online generation and reference checking method, device and application. The device comprises a laser light splitting unit, a laser collimation and focusing lens group, a laser incidence cavity, a reference cavity, a laser emission cavity and an atmospheric hydrogen-oxygen radical measurement cavity. The device can not only continuously and stably generate high-concentration hydrogen-oxygen radicals, but also can monitor the resonance fluorescence signal generated by the hydrogen-oxygen radicals in real time. The device has the advantages of high signal-to-noise ratio, low cost, good adaptability, stable and reliable operation, etc. As a key core component of a laser-induced fluorescence method radical measurement system, the device can be directly applied to wavelength monitoring and locking of a dye laser, and can be used for wavelength calibration of the dye laser instead of a wavelength meter.

This invention belongs to the field of lidar technology and discloses an iron resonance fluorescence Doppler lidar system. It employs a seed injection method, injecting a single-longitudinal-mode, frequency-stabilized seed light of a certain power into an oscillator stage unit. Through active cavity control technology, precise matching of the seed light frequency and the longitudinal-mode frequency of the oscillator stage is achieved, enabling the oscillator stage to output Q-switched pulses with good transverse-mode and frequency characteristics. Subsequently, the Q-switched pulses are amplified in the amplification stage unit using a MOPA configuration. After two nonlinear frequency transformations, single-longitudinal-mode narrow-linewidth laser output at a specific wavelength is achieved. This system uses iron atoms in the atmosphere as tracers, enabling high-precision detection of atmospheric temperature, wind field, and iron atom number density in the region from the top of the mesosphere to the bottom of the thermosphere.

Techniques for performing readout and reset of fluxonium qubits are disclosed. When fluxonium hardware components are coupled to a quantum metamaterial through a readout resonator, said components may be dispersively coupled such that a quantum state of the corresponding fluxonium qubit is read out through the quantum metamaterial, and then the state of the fluxonium qubit is subsequently reset in order to proceed with a quantum computation to be performed. Alternatively, when fluxonium hardware components are coupled directly to a quantum metamaterial, a quantum state of a fluxonium qubit is read out using resonance fluorescence, and then may be subsequently reset back to its ground state, also using resonance fluorescence. A width of a passband of the quantum metamaterial, along with frequencies of the control sequences used, may be tuned such that either readout or reset is selectively activated.

The application belongs to the technical field of laser radar, and discloses a laser generation device and method of iron resonance fluorescence Doppler laser radar. A first seed source and a second seed source respectively output continuous light; a first laser processor realizes real-time adjustment of the central wavelength of the continuous light after power amplification, frequency doubling, frequency stabilization and beat frequency of the continuous light; a second laser processor performs beam combination and beat frequency on the continuous light adjusted by the first seed source and the continuous light emitted by the second seed source, and locks the difference frequency signal on an applied radio frequency signal, and controls the radio frequency signal to cyclically jump within a certain interval; a pulse laser amplifier amplifies and nonlinearly frequency converts the continuous light emitted by the second seed source after locking, and outputs single-frequency stabilized narrowband pulse laser, while realizing time-sharing frequency hopping output of pulse light among three frequencies. The laser generation device provides a reliable light source for high-precision detection of atmospheric temperature, wind field and iron atom number density in the region from the top of the middle layer to the bottom of the thermal layer.

This invention discloses a method for locating special nuclear materials based on nuclear resonance fluorescence characteristic signals. The method includes the following steps: constructing a special nuclear material detection device; obtaining the time standard value of the nuclear resonance fluorescence characteristic signal at the center of the special nuclear material detection device; irradiating the special nuclear material to be tested with pulsed rays and recording the pulse emission time; obtaining the energy and time information of the characteristic rays of the special material to be tested based on the nuclear resonance fluorescence characteristic signal and the special nuclear material detection device; and obtaining the location result of the special nuclear material. The special nuclear material detection device constructed by this invention has a simple structure, reduces the number of detectors required for location, lowers costs, and shortens the location time of the special nuclear material by using this invention to obtain the location result.

The invention belongs to the technical field of atmospheric measurement, and discloses a measurement method for acquiring atmospheric parameters by using iron resonance fluorescence echo signals, which comprises the following steps of: quantitatively describing a physical model of an iron atom resonance fluorescence spectral line, and establishing a warm wind two-dimensional lookup table; the iron resonance fluorescence Doppler laser radar echo signals after data preprocessing are substituted into a two-dimensional lookup table, and atmospheric temperature and radial wind speed measurement results are obtained. By means of the measuring method, the atmospheric temperature and the vertical distribution profiles of the warp wind and the weft wind can be obtained at the same time, the detection precision is determined, and an effective data processing means is provided for fine research of the atmosphere in the area from the top of the middle layer to the bottom of the thermal layer.

The invention relates to a method for simulating a global UMLT area wind field and temperature and a 0-30 km wind field, and relates to the technical field of atmosphere remote sensing, and the method comprises the steps: transmitting 372 nm laser to the earth atmosphere through a satellite-borne laser radar system; calculating the number of echo photons generated by the resonance fluorescence effect of the received iron atoms based on the number density of the iron atoms in the WACCM atmospheric model and the temperature and pressure data in the ERA5 reanalysis data; and calculating the global atmospheric temperature and the global atmospheric wind speed of the UMLT region and the global atmospheric wind speed of 0-30km based on the echo photon number. According to the method, a WACCM atmospheric mode and ERA5 reanalysis data are used for simulating the satellite-borne ferro-laser radar to detect the global atmospheric wind speed and temperature and calculate corresponding errors, atmospheric parameters of the global scale are applied, obvious seasonal and regional characteristics are displayed, a more accurate method is provided for satellite-borne laser radar simulation, and the satellite-borne ferro-laser radar simulation method can be applied to simulation of the satellite-borne ferro-laser radar. And a more comprehensive simulation result can be obtained.

The application relates to a surface plasmon resonance-fluorescence dual-mode seawater iron ion detection method and system of a tapered optical fiber probe, and belongs to the technical field of optical fiber sensing and ion detection. The application aims at the problems of single detection mechanism, insufficient anti-interference ability in a complex environment and complex system structure of an existing iron ion detection mechanism, and provides a dual-mode detection scheme. The system excites a fluorescence response through a first light source, generates an SPR response through a second light source, contacts a tapered optical fiber probe plated with a gold film with a to-be-detected liquid containing tannic acid, and realizes synchronous acquisition of dual signals. A signal processing module performs fusion calculation based on a dual-signal quantitative analysis model, and cross verification is realized through the synergistic effect of the two optical response mechanisms. The application not only significantly improves the accuracy and stability of detection results, but also simplifies the probe preparation process, improves the system integration, and is suitable for on-site rapid detection of iron ions in seawater and other complex matrices.

The invention discloses an iron resonance fluorescence laser radar temperature and wind speed inversion error analysis method, and belongs to the technical field of low ionosphere detection. According to the iron resonance fluorescence laser radar temperature and wind speed inversion error analysis method, an iron resonance fluorescence laser radar simulation model is constructed, and photon echo signals are simulated in combination with an NRLMSIS-00 atmosphere model and actually measured iron atom density data; analyzing the influence of laser frequency jitter and light quantum noise on the inversion precision by adopting a Monte Carlo method; then, the error performance of a frequency scanning method and the error performance of a three-frequency ratio method are compared, it is proved that the error of the frequency scanning method in temperature inversion is lower, and the iron resonance fluorescence laser radar temperature and wind speed inversion error analysis method can provide guidance for systematic error modeling and parameter design of an iron resonance fluorescence laser radar; and the accuracy of atmospheric temperature and wind speed inversion can be improved.

The invention belongs to the technical field of optical sensing and magnetic field measurement, and provides an airborne marine foreign matter detection system and method based on sodium resonance fluorescence disturbance characteristics. The objective of the invention is to solve the bottleneck problems of low resolution, susceptibility to carrier interference, limited spatial resolution and the like in the existing marine foreign matter detection technology. The system comprises a femtosecond laser, a 589nm laser, a modulator, a light path assembly and a signal processing unit. The method comprises the following steps: starting a femtosecond laser to emit femtosecond pulse laser to control a light path; the 589nm laser emits resonance light which is subjected to filtering and frequency stabilization modulation to realize dual-frequency single-beam multiplexing for Na atomic polarization and frequency sweep detection; the femtosecond laser and the detection light are focused in a seawater area to generate Na atom ensemble through light path control; resonance fluorescence signals are generated through double-frequency light irradiation, and converted electric signals are collected; performing sweep-frequency measurement on the peak frequency of the fluorescence intensity to obtain Larmor resonance frequency, and calculating the magnetic field intensity. The device realizes long-distance and high-sensitivity ocean magnetic field detection, and is used for identifying and positioning airborne ocean foreign matters.

The invention discloses a dual-wavelength laser polarization splitting multiplexing emission system and method and application, the system comprises a Rayleigh Raman laser emission module, a resonance fluorescence laser emission module and a laser emission switching module, the Rayleigh Raman laser emission module emits a 532 nm laser beam, the resonance fluorescence laser emission module emits a 589 nm laser beam, and the laser emission switching module is connected with the Rayleigh Raman laser emission module and the resonance fluorescence laser emission module. The Rayleigh Raman laser emission module and the resonance fluorescence laser emission module share one high-power Nd: YAG laser; the laser emission switching module comprises a high-power PBS and an electrically-controlled rotary high-damage-threshold half-wave plate, the electrically-controlled rotary high-damage-threshold half-wave plate is used for controlling the polarization angle of an emitted laser beam, and the high-power PBS is used for controlling the emission direction of the laser beam. The dual-wavelength laser polarization splitting multiplexing emission technology provided by the invention can well meet the high specification requirements of the full-upper atmosphere temperature measurement laser radar on dual wavelength, high power and the like of laser emission, and is applied to the full-upper atmosphere temperature measurement laser radar.

The present invention relates to a method for detecting the wind field, temperature, and density in near-space based on iron atom resonance fluorescence, comprising the following steps: emitting a 372nm laser into near-space and receiving an iron atom resonance fluorescence echo signal generated by the ULT region and a Rayleigh backscattered echo signal generated by the region below the ULT; defining an atmospheric temperature response function and a wind speed response function based on the iron atom resonance fluorescence echo signal, and calculating the atmospheric temperature and wind speed in the ULT region based on the atmospheric temperature response function and the wind speed response function; inverting the atmospheric molecular density in the region below the ULT using a normalized algorithm based on the Rayleigh backscattered echo signal of the predetermined wavelength laser, and then inverting the atmospheric temperature in the region below the ULT based on the atmospheric molecular density. The present invention can detect the atmospheric temperature and wind speed in the ULT region, as well as the atmospheric molecular density and atmospheric temperature in the region below the ULT, and can obtain wind field, temperature, and density profile information with high precision around the clock.

The invention relates to the technical field of fluorescent materials, and particularly discloses a fluorescent sensing material as well as a preparation method and application thereof. The fluorescent sensing material is a carborane-containing boron-oxygen multiple resonance fluorescent derivative, boron-oxygen multiple resonance molecules are combined with ortho-carborane, so that the fluorescent sensing material has a unique structure, and the structure can effectively capture BTEX gas molecules, so that the fluorescent sensing material is subjected to fluorescence quenching; therefore, efficient detection of the BTEX gas is realized. The boron-oxygen multi-resonance fluorescent sensing material containing carborane prepared by the invention can realize specific detection on BTEX steam, and shows excellent properties such as high response speed, short recovery time, low detection limit, recoverable utilization and large Stokes shift. By utilizing the method, the problems of expensive detection equipment, complicated operation and low detection sensitivity of the existing BTEX gas detection method are effectively solved.

The invention provides a method for simultaneously detecting 80-100 km temperature and wind field and 0-30 km wind field based on a satellite-borne iron laser radar, and relates to the technical field of atmosphere remote sensing, and the method comprises the steps: transmitting laser with the wavelength of 372 nm to an atmosphere UMLT region through the satellite-borne iron laser radar, and calculating the number of echo photons generated by the resonance fluorescence effect of received iron atoms; a temperature response function and a wind speed response function are defined according to the echo photon number, the atmospheric temperature of the 80-100 km area is calculated according to the temperature response function, and the atmospheric wind speed of the 80-100 km area is calculated according to the wind speed response function; and calculating the atmospheric radial wind speed of 0-30km according to the number of echo photons based on the Doppler principle. According to the method provided by the invention, atmospheric parameters of 0-30 km and 80-100 km are detected simultaneously based on the satellite-borne iron radar, and wind field and temperature profile information can be acquired in a high-precision manner all day long.

This invention provides a light-emitting layer comprising: a TADF material, a phosphorescent material, a multi-resonance fluorescent material, and a host material. The addition of the phosphorescent material to the light-emitting layer enables it to receive triplet excitons, which can then be transferred to the singlet energy levels of the multi-resonance fluorescent material, reducing the number of triplet excitons within the device and improving its lifetime. The multi-resonance fluorescent material can convert triplet excitons into singlet excitons while receiving a small number, improving the device's efficiency. Due to the dual quenching effect of the phosphorescent material and the multi-resonance fluorescent material on the TADF material, the luminescence of the TADF material can be completely suppressed, improving the stability of the emission spectrum. This invention also provides a light-emitting device and a light-emitting apparatus.