77 results about "Photon transmission" patented technology

The invention discloses a pain treatment method based on infrared photothermal coupling, and belongs to the technical field of medical engineering. Comprising the following steps: acquiring physiological feature data, pathological feature data and optical feature data of a patient, and acquiring initial equipment parameters of the intelligent infrared photothermal treatment device; the method comprises the following steps: constructing an individualized photo-thermal response prediction model through Monte Carlo photon transmission simulation in combination with finite element heat conduction analysis, predicting a therapeutic effect score and an optimal parameter combination by using a deep neural network model based on a Transform architecture, generating an individualized temperature-time therapeutic curve, and determining initial illumination parameter configuration; controlling the intelligent infrared photothermal treatment device to start a treatment process according to the initial illumination parameter configuration; and according to the comprehensive biomarker score and in combination with a real-time analysis result of the neural network processing module, the output power, the pulse duty ratio and the irradiation mode of the infrared light source are automatically adjusted through the infrared light source control module.

The invention discloses a dynamic nonreciprocity modulation method and system based on double-cavity coupling and a storage medium. The method comprises the following steps: establishing a double-atom-double-cavity waveguide QED system model; calculating a momentum equation of the double-atom-double-cavity waveguide QED system; calculating a transmittance expression of photons according to the momentum equation; non-reciprocity modulation of photon transmission is realized by modulating atomic frequency and / or mutual coupling strength of the double cavities. According to the invention, the problem that effective photon non-reciprocal transmission is difficult to realize in a broadband range in the prior art is solved.

A radar time synchronization system according to an example embodiment of the present disclosure include a transmitter radar, a receiver radar, and a quantum interferometer device communicatively coupled to the transmitter radar and the receiver radar. The quantum interferometer device includes a quantum entanglement source operable to transmit a first entangled photon to the transmitter radar and a second entangled photon to the receiver radar. The quantum interferometer device further includes a quantum entanglement detector operable to receive the first entangled photon from the transmitter radar and the second entangled photon from the receiver radar. The quantum entanglement detector further operable to detect a quantum interference effect associated with the first entangled photon and the second entangled photon. The quantum interferometer device synchronizes a first time associated with the transmitter radar and a second time associated with the receiver radar based at least in part on the quantum interference effect.

The invention discloses a waveguide structure for generating complex coupling strength and a design method thereof, and belongs to the technical field of integrated optoelectronic devices, and the method comprises the steps: designing a waveguide structure meeting the requirement of a complex coupling coefficient according to an expression of an equivalent coupling coefficient caused by an artificial standard field of a double-waveguide coupling system transmitted along a z direction; and according to the obtained waveguide function meeting the complex coupling coefficient requirement, constructing different waveguide structures, and carrying out modeling simulation on the constructed different waveguide structures. Artificial standard field modulation is introduced into a waveguide structure, and a direct coupling coefficient between optical waveguides is expanded from a real number domain to a complex number domain; the artificial standard field is used for carrying out geometric structure modulation on the optical system so as to influence photon transmission in the optical system; a proper optical waveguide structure is designed by using an equivalent coupling coefficient calculation formula, and a complex coupling coefficient is obtained, so that complex photon state conversion and light intensity regulation and control in the optical waveguide array can be realized by using the complex coupling coefficient.

A method for key generation with quantum key distribution including:i) generation of entangled photon pairs;ii) transmission of the photons to a first and second receiver;iii) measurement of photons at the first receiver to generate a first raw key and first receiver data and measuring photons at the second receiver to generate a second raw key and second receiver data;iv) generation of a first sifted key at the first receiver and at the second receiver by sifting and then generation of a common key.In step iv), the first receiver data are first transmitted from the first receiver to the second receiver, and subsequently in step iv) the second receiver performs a pre-sifting to reduce the second receiver data, based on the first receiver data and one or more pre-sifting parameters, and subsequently in step iv) the pre-sifted second receiver data are transmitted to the first receiver.

This invention relates to the field of photoelectric detection and performance monitoring technology, specifically to a real-time performance verification system for a safety light curtain based on pulse feedback. The system performs the following steps: based on the changes in the effective photon count of each pulse of the safety light curtain, the effective photon count of pulses whose decrease in effective photon count is due to transient interference is smoothed to obtain a photon transmission efficiency time series; based on the photon transmission efficiency time series, a dynamic derivative curve of the pulse edge is established, and pulses within a period where the core parameter of the dynamic derivative curve at the pulse edge continuously changes in a second-order direction towards the target direction are identified as abnormal pulses; each key time node of the abnormal pulse is determined; based on the changes in the differences between each key time node, the fault cause corresponding to the abnormal pulse is located, thus improving the accuracy of real-time performance monitoring of the safety light curtain.

The application discloses a monolithic integrated self-powered luminescent solar concentrator-electrochromic integrated device and a preparation method thereof, and has a layered structure, which is, from bottom to top, a conductive glass substrate, an electrochromic layer, a transparent sealing tape, a fluorescent gel electrolyte layer, a transparent sealing tape, an electrochromic layer and a conductive glass substrate. The monolithic integrated self-powered luminescent solar concentrator-electrochromic integrated device can realize reversible conversion between bleached state and colored state within 100 seconds under natural sunlight, and realize dynamic adjustment of the transmittance of incident sunlight. The core functional layer of the device is a fluorescent gel electrolyte with high luminescent efficiency, and the photoluminescence quantum yield can reach 74.9%, so that the device has excellent light capturing and photon transmission performance, and can realize high-efficiency photoelectric conversion by coupling a solar cell at the edge of the device to provide power for the reversible driving of the electrochromic device. The application realizes self-powered electrochromism which can be applied to building glass curtain walls.

The disclosed embodiment is about an adaptive strategy for the optimal photon number of a quantum interferometer radar under a stratocumulus cloud background. It includes: a QIR system generates detection photons and reference photons with preset photon numbers, and directs the detection photons toward the detection target; the QIR system receives the reflected detection photons; a mathematical model is established based on the influence of the scattering, absorption, and other characteristics of the liquid water content of the stratocumulus clouds in the atmospheric environment on the reflected detection photons, and the relationship between the liquid water content of the stratocumulus clouds, the number of radar transmitter signal photons, and the transmission distance of the detection photons is obtained; based on the relationship between the liquid water content of the stratocumulus clouds, the number of transmitter signal photons, and the transmission distance of the detection photons, the number of radar transmitter photons is adaptively adjusted so that the radar system can achieve the optimal average photon number. The disclosed embodiment effectively improves the robustness of the QIR system under the water content of stratocumulus cloud particles by adjusting the average photon number of the QIR system in real time.

The invention discloses a radar interference and safety communication integrated system based on photonics, which comprises an optical signal generation unit, an arbitrary waveform generator module, a signal integrated processing unit and a signal transmission unit, and is characterized in that the optical signal generation unit is used for generating carrier suppression double-sideband optical signals; the arbitrary waveform generator module is used for generating a driving signal for driving the in-phase quadrature modulator module, and the driving signal comprises an encrypted OFDM signal and an LFM signal for radar interference; the signal integrated processing unit is used for combining the driving signal and the carrier suppression double-sideband optical signal, and generating and outputting an integrated optical signal; and the signal transmission unit is used for converting the optical signal into an electric signal to realize signal transmission. According to the technical scheme, radar interference and safe communication can be achieved in the same transmission system at the same time, and due to photon transmission, the transmission system is wide in bandwidth, low in loss and high in anti-electromagnetic interference capacity.

The invention relates to the technical field of data transmission, and discloses a laser data synchronous transmission method based on quantum entanglement, and the method comprises the steps: determining a data transmitting source and a data receiving source of to-be-transmitted laser data; generating entangled photon pairs, and sending the entangled photon pairs to a data sending source and a data receiving source; historical data transmission records are collected, identification marks are generated, and historical data transmission fluctuation factors are calculated; acquiring transmission environment data, outputting a data transmission influence value based on the data transmission influence value model, and calculating a data transmission influence factor; determining a comprehensive data transmission factor according to the historical data transmission fluctuation factor and the data transmission influence factor, and determining a data transmission strategy; the to-be-transmitted laser data is inserted into the first entanglement photon, the first entanglement photon inserted with the to-be-transmitted laser data is transmitted to the second entanglement photon based on the data transmission strategy, the data transmission strategy is adaptively adjusted, data transmission fluctuation is avoided, the stability and reliability of the data transmission process are improved, and synchronous transmission of the laser data is achieved.

In some implementations, a photonic transmission structure includes a first cladding structure; a first active structure disposed over the first cladding structure; and a second cladding structure disposed over the first active structure. The first active structure includes a non-alkali, oxide solution that includes a cation that is niobium.

The application belongs to the technical field of solar cells, and relates to a CdTe thin film cell with a window layer of a multilayer cyclic composite structure and a preparation method thereof. The CdTe thin film cell comprises a glass substrate, a transparent conductive layer, a buffer layer, a window layer, an absorption layer, a back contact layer and a metal electrode layer which are arranged in layers. The window layer is of a multilayer cyclic composite structure, and the material of a cyclic unit comprises a metal chalcogenide compound. The window layer with the multilayer cyclic composite structure optimizes a photon transmission path, avoids the generation of pinhole phenomenon of the window layer, prevents short circuit and current shunt of the cell, and significantly improves the conversion efficiency of the solar cell.

The application discloses an imaging method for fusing photon weight and diffuse light brain tissue blood oxygen concentration change quantity and related products, and relates to the technical field of biological tissue blood oxygen imaging. The method comprises the following steps: acquiring experimental data obtained by irradiating a measured tissue with light sources of two wavelengths; performing the following calculation on the experimental data corresponding to each wavelength of the light source: calculating the average photon transmission path of the kth light probe combination in the ith voxel unit by using a formula; calculating the photon weight of the kth light probe combination in the ith voxel unit by using a formula; calculating the change quantity of the tissue absorption coefficient of the ith voxel unit by using a formula; and finally calculating the change quantity of the concentrations of oxyhemoglobin and deoxyhemoglobin by using the calculation data obtained by the two wavelengths. The application proposes a method for fusing photon weight, and by means of weight calculation, the accurate brain tissue blood oxygen concentration change quantity can be obtained by using a small amount of S-D combination photon signals.

The invention relates to a method for the temporal synchronization of detection events of two receivers for quantum communication, preferably for quantum key exchange (QKD), comprising the generation of entangled photon pairs in a source, transmission of one individual photon of each entangled photon pair to each receiver, detection of the individual photons at each receiver and storage of the detection events, and the temporal synchronization of the detection events of the two receivers, preferably for quantum key exchange (QKD). Essentially, during the generation of the entangled photon pairs for the temporal synchronization of the detection events of the two receivers, the emission rate of the individual photons of the entangled photon pairs in the source is changed over a time interval Δtmod, and the change in the emission rate of the individual photons is detected at both receivers for the purpose of synchronizing the detection events.

A lighting device (ED) comprises at least: - a housing (BB1) including a rear wall (PRB) and two first side walls (PLB1-PLB2) extending forward from the rear wall (PRB) and defining with the latter a first cavity (CB) housing a light guide (GL1) delivering photons onto a front face (FV1), and - a protective glass (GP1) coupled to the housing (BB1) and including a front wall (PVG) oriented towards the front face (FV1) through which the delivered photons exit, and second side walls (PLG1-PLG2) extending backward from the front wall (PVG) and defining with the latter a second cavity (CG) housing at least the first side walls (PLB1-PLB2), after they have been respectively fitted with tension by the second side walls (PLG1-PLG2) and interposed glue. Figure 3

This invention belongs to the field of quantum dialogue and discloses a one-step quantum dialogue method. In this method, communicator A prepares a large number of identical polarization-spatial hyperentangled states and sends one photon from each hyperentangled state to communicator B through a quantum channel, establishing a hyperentangled quantum channel between the two parties. After confirming the security of the photon transmission process, both parties encode the photon pairs according to the information to be transmitted. Then, by running nonlocal Bell state measurements and publishing the detector responses, both parties can read the information transmitted by the other, thus achieving bidirectional quantum communication, i.e., quantum dialogue. Compared with existing quantum dialogue protocols, this invention reduces the number of photon transmissions in the channel from two to one, simplifying experimental operations and effectively reducing the photon loss rate, which can effectively promote the practical application of quantum dialogue.

A lighting device (DE), on the one hand, is part of a door fitted to a vehicle and comprising an area comprising a gripping recess, and, on the other hand, comprises: - a source (SP) generating photons for a diffusion part (PD1) comprising a front face (FV1) delivering these photons into this gripping recess, and - a light guide (GL) comprising, on the one hand, a main part (PPG) receiving these generated photons to guide them to a first sub-part (SP1) installed along an edge of the area and comprising a front face (FV2) delivering guided photons to illuminate a part of a door panel located above the gripping recess, and, on the other hand, a first branch (B1) comprising a first end (EB1) through which guided photons enter the main part (PPG) and a second end (EB2) delivering these entered photons to power the part diffusion (PD1). Figure 2

The invention discloses an aggregation-induced emission material, and fluorescent power generation glass and a fluorescent solar concentrator prepared based on the aggregation-induced emission material, and relates to the technical field of preparation of fluorescent solar concentrators. The invention provides an organic micromolecule material with an aggregation-induced emission (AIE) characteristic, solves the problem of fluorescence intensity weakening caused by a self-absorption effect in a traditional fluorescent solar concentrator, ensures high fluorescence quantum yield, and reduces reabsorption loss of photons in a transmission process. Besides, the optical waveguide transmission path is further optimized by adopting the design of a multi-layer laminated structure, the photon transmission efficiency is remarkably improved, and the optical waveguide has important positive significance in promoting the technical development of the fluorescent solar concentrator.

In some implementations, a photonic transmission structure includes a first cladding structure; a first active structure disposed over the first cladding structure; and a second cladding structure disposed over the first active structure. The first active structure includes a non-alkali, oxide solution that includes a cation that is niobium.

A detector with reduced fluorescence range noise is disclosed. This paper proposes a device comprising: a structure defining a detector surface configured to support a biological or chemical substance; and a sensor array including a light sensor and circuitry for transmitting data signals using photons detected by the light sensor. The device may include one or more features for reducing fluorescence range noise in the detection band of the sensor array.

The invention provides a security enhancement method and system for a computer communication link, and belongs to the field of communication security. The method comprises the following steps: receiving a starting point and an ending point of a communication link to be laid, and matching a first virtual laid communication link set; traversing the first virtual layout communication link set, and extracting a quantum signal transmission influence parameter set; searching a same-mode communication link sample based on the quantum state coding library, and counting a first single-photon transmission bit error rate set; and carrying out minimum bit error rate sorting on the first virtual layout communication link set to obtain a selected layout communication link, and sending the selected layout communication link to a user side to execute recommendation. The technical problems of too high single photon transmission bit error rate and poor communication stability caused by lack of analysis of transmission influence parameters during quantum communication link layout in the prior art are solved, and the purposes of reducing the bit error rate of the quantum communication link and improving the communication stability by optimizing and sorting the quantum signal transmission influence parameters are achieved. And the transmission stability and reliability of quantum communication are improved.

An entangled photon is produced by a photon source at cryogenic temperature in vacuum chamber and supplied to an optical communication fiber outside the vacuum chamber. Prior to generating the photon, ionized gas and / or gaseous radicals are supplied in a part of an optical path for the photon in a vacuum space between the photon source photon source and the optical communication fiber. This counteracts loss of entangled photon yield at entry of the photon from the photon source into the vacuum space.

The present disclosure proposes a quantum satellite communication performance adjustment method based on the heliotropism of sunflowers, including establishing a quantum satellite communication system model in a snowfall environment; the quantum satellite communication system model includes an analog quantum satellite communication system; analyzing the influence of snowfall intensity and quantum satellite communication elevation angle on the quantum satellite communication link in the quantum satellite communication system, obtaining the attenuation result of the quantum satellite communication link in the snowfall environment, and the relationship between the photon transmission distance of the quantum satellite and the communication elevation angle; according to the attenuation result of the quantum satellite communication link and the relationship between the photon transmission distance of the quantum satellite and the communication elevation angle, using the heliotropism principle of sunflowers, the optimal average photon number performance adjustment function relationship of each pulse in the quantum satellite communication system in the snowfall environment is obtained under the decoy state protocol. The present disclosure can effectively cope with the influence of snowfall and small elevation angle on the performance of quantum satellite communication.

The invention discloses a method for acquiring dark current activation energy of pixels before and after irradiation of an image sensor. The method comprises the following steps: S1, calculating a conversion gain according to a photon transmission curve before and after irradiation of an image sensor; s2, dark current images before and after irradiation of the image sensor are collected, and dark current values at different temperatures are calculated through conversion gain; and S3, pixel dark current activation energy is calculated according to the dark current value. According to the method provided by the invention, the dark current acquisition temperature ranges of the image sensors of different irradiation types before and after irradiation are determined without covering a relatively large temperature range and acquiring dark current activation energy data of more acquisition temperature points, so that the dark current activation energy testing speed and accuracy of the image sensors after irradiation can be remarkably improved; the method is especially suitable for batch screening of the image sensors under the condition that the irradiation dose is large and the pixels of the image sensors are not subjected to special anti-irradiation reinforcement, and the testing efficiency can be greatly improved.

The invention discloses an energy spectrum CT and optical dual-mode imaging system and method with high space and spectral domain resolution. An X-ray energy spectrum detector in the system is used for collecting multi-energy-level X-ray projection data; the hyperspectral camera is used for collecting multispectral fluorescence data and fluorescence images; the method comprises the following steps: correcting X-ray projection under each energy level, performing three-dimensional reconstruction on corrected multi-energy-level projection data, performing volume rendering on the reconstructed three-dimensional data to obtain a three-dimensional contour of an object, mapping fluorescence data to the three-dimensional contour, and mapping the fluorescence data to the three-dimensional contour, according to an accurate substance decomposition result obtained through multi-energy-level CT reconstruction, an accurate photon transmission forward model is constructed and reconstructed by referring to scattering coefficients and absorption coefficients of different substances on the basis of a third-order simplified spherical harmonic equation, three-dimensional registration and image fusion are carried out on a dual-mode image, and a dual-mode fusion image is obtained; the dual-mode fusion image obtained by the method is high in spatial resolution and high in spectral domain resolution.

The invention discloses a grain boundary-free multilevel structure organic micro-nano crystal and a preparation method and application thereof.The preparation method comprises the following steps that small organic molecules or coordination compounds are dissolved in an organic solvent, or acceptor molecules and donor molecules are dissolved in the organic solvent, and an organic micro-nano crystal stock solution is obtained; and regulating the viscosity of the organic micro-nano crystal stock solution to 0.5-4.0 mPa.s, dropwise adding at least one organic micro-nano crystal stock solution onto the substrate, and completely volatilizing the organic solvent to obtain the crystal boundary-free multilevel structure organic micro-nano crystal. According to the invention, a continuous photon transmission path is successfully constructed by using the crystal boundary-free characteristic of the crystal, so that the photon transmission efficiency is remarkably improved.

An optical unit (OU), for example for a vehicle, comprises a housing (H) and a protective lens (PL) defining a space in which at least one optical module (OM1) is installed. This module delivers photons upstream of the protective lens (PL) to perform a photometric function that complies with regulations. The optical unit (OU) also includes, within a zone encompassing its protective lens (PL), at least one sub-zone (SZ11) designed to be selectively of a chosen crystalline or non-crystalline color, while still allowing the photometric function to comply with regulations. Figure 2

A lighting system (LS) equips a vehicle and comprises: - a photon-generating source, - a first light guide (GL1) receiving the generated photons and delivering them to a first front face (FV1), - a second light guide (GL2) receiving the photons from the first front face (FV1) on a rear face (FR2) and delivering them to a second front face (FV2) to perform a photometric function, - a third light guide (GL3) interposed between the first (GL1) and second (GL2) light guides, coupled to the rear face (FR2), and capable of transferring photons delivered to the first front face (FV1) into the second light guide (GL2), and - a mask (MD) comprising an aperture (O) through which the second light guide (GL2) passes, masking the third light guide (GL3), and aligned with the latter. Figure 2

The present invention relates to a thermal power plant non-contact optical component detection apparatus, which comprises a laser light source, a light flux cell, a reflector group, a monochromator, a detector and an optical fiber probe, the laser output by the laser light source irradiates the light flux cell through the reflector group, the light flux cell irradiates the laser to a to-be-detected object so as to generate Rayleigh scattering with particles in the to-be-detected object, and the particle size of the to-be-detected object is detected. Rayleigh scattering photons of a to-be-detected object are collected through the optical fiber probe and transmitted to the output end of the light flux cell, the collected photons are transmitted to the monochromator through the reflector set, stray light is reduced through the monochromator, the dispersion effect is improved so as to generate a spectrum transmitted to the detector, the detector decomposes the received spectrum into monochromatic light of different wavelengths, and the monochromatic light is transmitted to the output end of the light flux cell. And respectively converting into electric signals, carrying out digital analysis processing, and determining corresponding component and structure information according to peak position and intensity matching of each monochromatic light. Compared with the prior art, the device has the advantages of non-contact measurement, safety, high sensitivity, good real-time performance and the like.

The invention discloses a single-photon quantum secure direct communication attack method based on weak random basis selection. Bob prepares a group of single photon sequences SA, and Bob transmits all photons of SA to Alice through a quantum channel; eve intercepts all photons of the SA sequence; after receiving the photons, Alice randomly extracts a part of photons to carry out safety detection so as to obtain a detection error rate; if the bit error rate is detected to be lower than a preset threshold value, the Alice arranges the remaining photons into a sequence SB; the Eve intercepts a photon sequence SB sent by the Alice, and a new single photon state is prepared again, inserted into a corresponding position in the SB and sent to the user Bob; after the Bob receives the photon sequence SB, the photon sequence SB is stored in a quantum memory; alice publishes the position of a safety detection photon, and Bob carries out measurement and comparison so as to obtain a quantum bit error rate; and coding information of Alice is obtained. The method has important guiding significance for researching the security of the quantum secure direct communication under the actual experiment condition.