95 results about "Photon source" patented technology

The waveguide carrying a nonlinear crystal with reflective interface, a pump photon source and a circulator define an optical parametric amplifier which uses optical power from the pump photons to boost incoming signal and idler photons which carry the encoded signal. The nonlinear crystal performs optical parametric amplification upon the incoming optical signal in a quantum photonic process that generates additional signal and idler photons to thereby boost the intensity of the incoming signal. A photodetector is coupled for communication with the third port and operative to convert the reflected optical signal into an electrical signal defining the output of the communications receiver.

A single photon source device is proposed. The device may include a reflection layer including a base portion and a recessed portion having a concave shape that is recessed from the base portion, a single emitter disposed within the recessed portion of the reflection layer and configured to emit a single photon, a solid resonator configured to fill the recessed portion to surround the single emitter, and a solid immersion lens portion disposed on the solid resonator to surround the solid resonator.

The invention discloses a source device independent quantum key distribution method, device and system and a network thereof, and belongs to the technical field of quantum key distribution. In order to solve the problem that an existing quantum key distribution protocol depends on a source end security hypothesis and is difficult to defend unknown source side attacks, the invention provides a source equipment-independent quantum key distribution protocol. Through the physical characteristics of the non-classical quantum light source and a pairing method after measurement, the security hypothesis of source end equipment is removed, known and unknown source side attacks can be effectively resisted, and the quantum advantages in the aspects of security and performance expression compared with a classical laser source are realized. The invention further provides a method for directly expanding the point-to-point protocol to the multi-user quantum key distribution network, compared with an existing quantum network based on an entangled photon source, the complexity of an experiment system and the requirement for equipment are reduced, and the method is suitable for long-distance and high-safety quantum communication and quantum network deployment.

The invention provides a Rydberg atomic electromagnetic signal detection device based on correlated photon coincidence measurement, and the device comprises a correlated photon source assembly which is used for enabling single-polarization and frequency-stable laser to generate polarization orthogonal correlated photon pairs; the Rydberg atom preparation system is in communication connection with the associated photon source assembly, and associated photon pairs emitted by the associated photon source assembly enter the Rydberg atom preparation system; the correlation detection assembly is in communication connection with the Rydberg atom preparation system and is used for counting transmission photons of the EIT-AT split transmission spectrum signals, and when the difference value between the reference photon arrival time and the transmission photon arrival time is within a preset range, the EIT-AT split transmission spectrum signals are regarded as coincidence events and coincidence counts are recorded. According to the invention, the problem of low sensitivity caused by the defects of optical readout noise, weak off-resonance field response, sensitive temperature drift vibration environment and the like in the prior art is solved.

The invention discloses an OpenMC-based BNCT dose full-process automatic calculation output method, and particularly relates to the technical field of boron neutron capture therapy dose calculation, and the method comprises the steps: reading a DICOM-CT image, automatically completing HU value segmentation, material assignment and voxel grid modeling, and generating an OpenMC geometry and material input card; setting a neutron / photon source, an operation mode and a counting grid, and executing Monte Carlo transport calculation; an ICRP flux-dose conversion coefficient library is built in, and dose calculation is automatically completed; the dose field is written into an Rt dose file, and the Rt dose file can be directly imported into mature medical image processing software for visual evaluation and plan optimization. According to the method, end-to-end automation from the CT image to the clinical available dose file is achieved, manual intervention is not needed, the BNCT dose calculation efficiency, precision and standardization level are remarkably improved, and a reliable tool is provided for BNCT dose simulation research.

The application discloses a single-photon source anti-bunching measurement device and method, relates to the technical field of single-photon detection, and comprises a single-photon source module, a signal trigger light path module, an interference light path module, a single-photon detector module and a coincidence counting module. The single-photon detector module comprises a first gated single-photon detector, a second gated single-photon detector, a first single-photon detector and a second single-photon detector, and can realize accurate measurement of the anti-bunching value of a deterministic single-photon source and a heralded single-photon source.

A system and method for determining a level of an analyte parameter, comprising: causing a photon source to send photons to a probe sensitive to an analyte, exciting the probe to emit light; receiving optical data from a photodetector based on the light emitted from the probe; determining a difference between a first level of the analyte parameter at a first location adjacent to a first surface of the probe and an intermediate level of the analyte parameter at an intermediate location between the first location and a second location adjacent to a second surface of the probe; and determining a second level of the analyte parameter adjacent to the second surface of the probe based on the difference between the first level of the analyte parameter and the intermediate level of the analyte parameter.

Methods and apparatus for using exempt gamma photon sources to measure fluid properties are described herein. The gamma photon sources are used with detectors in an arrangement that provides a short photon path length between source and detector. Fluid measurement devices described herein have a fluid container defining an interior, an exempt gamma-ray source located outside the fluid container, and a gamma-ray detector located outside the fluid container, the exempt gamma photon source and the gamma-ray detector defining a photon path that traverses the interior of the fluid container along a non-diametric chord of the fluid container.

Disclosed is a multi-entangled photon source-based multi-level user quantum key distribution network and distribution method. Bandwidth requirements can be effectively dispersed by introducing a plurality of entangled photon sources, enabling a quantum entanglement-based quantum secure communication network supporting a plurality of users to be possible. When arranging the second-level photon source, problems of transmission loss and quantum key rate decline caused by an excessively long distance between users in a same user group and a central entangled photon source can be effectively alleviated. Under a multi-user hierarchical framework, the pressure of the central photon source has been further reduced, which provides the possibility for building an entanglement-based secure communication network with more users and a wider range.

The invention relates to a node of a network, wherein the node comprises a monolithically integrated entropy source comprising: a photon source designed to emit photons, wherein the photon source comprises a first housing, wherein the first housing is formed by a first bottom face, a first top face and at least one first side face interconnecting the first bottom face and the first top face; and a photon detector designed to detect photons emitted by the photon source, wherein the first bottom face of the photon source is arranged towards the photon detector.

Photonic quantum random number generators (QRNGs) that may natively generate entropy of a desired distribution (e.g., according to a desired PDF) are disclosed. These photonic QRNGs may comprise a photon source coupled to a Mach-Zehnder Modulator (MZM) array comprising a set of MZMs. This array of MZMs can be coupled to a photodetector array comprising a set of photodetectors. An extractor can be coupled to the photodetector array where the extractor is adapted to produce values based on detection of photons at the photodetector array. The MZM array can be tuned to achieve a desired distribution of entropy.

The invention relates to a lighting device (DE) with which a vehicle is equipped, the lighting device comprising a photon source generating photons, a first light guide (GL1) receiving the generated photons with a view to delivering them to a first front face (FV1) in a first general direction, and a second light guide (GL2) of flat type, receiving on a rear face (FR2) the photons delivered to the first front face (FV1) with a view to delivering them to a second front face (FV2) that is inclined with respect to the first general direction. The first light guide (GL1) comprises, in proximity to at least one end (E1, E2) of the first front face (FV1), a projecting portion (PS1, PS2) comprising an auxiliary front face (FVA1, FAV2) delivering in the direction of the rear face (FR2) generated photons in at least one auxiliary general direction that is inclined with respect to the first general direction.

A lighting device (LD) is fitted to a vehicle and comprises a photon source that generates photons, a first light guide (GL1) that receives the generated photons and delivers them to a first front face (FV1) in a first general direction, and a second, flat light guide (GL2) that receives the photons delivered to the first front face (FV1) on a rear face (FR2) and delivers them to a second front face (FV2), inclined relative to the first general direction. This first light guide (GL1) includes, near at least one end (E1, E2) of the first front face (FV1), a projecting portion (PS1, PS2) with an auxiliary front face (FVA1, FAV2) that delivers generated photons towards the rear face (FR2) in at least one auxiliary general direction inclined relative to the first general direction. Figure 2

The application discloses a wave-particle duality demonstration teaching device, and relates to the technical field of wave-particle duality demonstration teaching, which comprises a wave-particle duality device and an upper computer software operating system, wherein the wave-particle duality device comprises a single-photon source system, a combined prism system, a photon collection system and an electronic control system; the combined prism system comprises a first prism, a second prism and a light shield; the first prism and the second prism make the second polarized light output by the single-photon source system carry out Mach-Zehnder interference under the set adjustment angle of the light shield, and an interference light path is obtained; the electronic control system is used for counting the photons detected by a single-photon detector; and the upper computer software operating system displays the detection result. The wave-particle duality can be directly demonstrated through the wave-particle duality device and the upper computer software operating system, and the change of the photons can be observed only by adjusting the light shield, so that the operation is convenient.

A quantum circuit includes a plurality of first optical waveguides and a plurality of second optical waveguides formed on a substrate and each of which includes a single-photon source; a first multiplexer formed on the substrate and configured to condense first photons propagated through the plurality of first optical waveguides; a second multiplexer formed on the substrate and configured to condense second photons propagated through the plurality of second optical waveguides; a branching element configured to introduce the first photons condensed by the first multiplexer and the second photons condensed by the second multiplexer and branch the first photons and the second photons in a first direction and a second direction; a first detector configured to detect the first photons and the second photons branched in the first direction; and a second detector configured to detect the first photons and the second photons branched in the second direction.

This invention relates to an integrated quantum random number generator (iQRNG), particularly a photonic QRNG monolithically constructed in a shared semiconductor substrate within the same material system in a scalable and fully integrated manner. It comprises a photon source and a detector for single photons directly coupled to the source, implemented in a particularly compact and attack-resistant manner on a semiconductor-structured technology platform open for a wide range of applications. The subject of this invention is an integrated quantum random number generator iQRNG (200) comprising a photon source (120) and a single-photon detector (130), wherein the photon source (120) and the single-photon detector (130) are arranged vertically overlapping each other in a shared substrate (110) made of semiconductor material. Furthermore, this invention also relates to an integrated electronic circuit (500) comprising at least one iQRNG (200) according to the invention.

The invention relates to a contact state sensor for a plug connector, comprising a monolithically integrated entropy source comprising: a photon source designed to emit photons, the photon source comprising a first housing, the first shell is formed by a first bottom surface, a first top surface and at least one first side surface connecting the first bottom surface and the first top surface; and a photon detector designed to detect photons emitted by the photon source, the first bottom surface of the photon source being arranged towards the photon detector.

Disclosed in the present application are a multi-tier user quantum key distribution network and distribution method based on multiple entangled photon sources. By means of introducing multiple entangled photon sources, bandwidth requirements can be effectively dispersed, such that a quantum-entanglement-based quantum secure communication network supporting multiple users becomes possible. During the deployment of second-tier photon sources, the problems of transmission loss and key rate reduction that are caused by excessively long distances between users in the same user group and a central entangled photon source can be effectively mitigated. Under a multi-user-tier framework, the pressure of the central photon source is further reduced, thereby providing the possibility of constructing an entanglement-based secure communication network having more users and a wider range.

The present invention provides an electronic device having a quantum photonic integrated circuit (QuPIC) including a photonsource, a photon detector and an optical waveguide configured for guiding the photons from the source to the detector.

This invention belongs to the field of quantum optics and quantum information processing technology, and discloses an integrated high-order orbital angular momentum entangled photon source system and its generation method. The system includes a pump laser, a polarization preprocessing module, an entanglement generation module, a wavefront and mode control module, and a detection and post-processing module. This design overturns the "post-stage cascaded" mode commonly used in existing technologies (i.e., adding OAM modulation devices to independent, separate modules); by placing OAM modulation inside the interferometer, the optical path is greatly shortened, making the entire device structure more compact and highly integrated. This avoids the complex alignment and high sensitivity to vibration / temperature drift caused by multiple independent modules, fundamentally enhancing the system's robustness and long-term stability. Simultaneously, it allows for arbitrary adjustment of the topological charge, reducing system complexity and potential losses.

The invention discloses a simulation method for transmission of X-rays in multiple capillaries, and belongs to the technical field of data processing, and the method comprises the following steps: S1, reading parameters of a light source and a multi-capillary structure from an input file by a program; s2, adopting a 4 pi divergent photon source; s3, constructing a multi-capillary structure; s4, constructing a sub-capillary structure, and dispersing the sub-capillary into an inclined circular truncated cone structure; s5, enabling photons to enter the capillary tube; s6, calculating collision positions and angles of photons and capillary walls; s7, photons are transmitted in multiple capillary tubes; according to the simulation method, the calculation efficiency and reliability of simulation can be remarkably improved.

The application provides a temperature gradient monitoring method and system for bismuth target dissolution reaction, relates to the technical field of data monitoring, and comprises the following steps: step 1, acquiring energy deposition density distribution data and nuclide activity data along the axial and radial directions inside the bismuth target, and converting the nuclide activity data into nuclide mass data at corresponding positions; step 2, based on the nuclide mass data, calculating the intensity of a photon source term generated by a spallation reaction inside the bismuth target and corresponding energy group division results, inputting the intensity of the photon source term and the corresponding energy group division results into a photon transport calculation model to perform photon transport calculation, and obtaining a photon radiation dose equivalent rate distribution outside the target body. The application eliminates radiation interference, accurately characterizes the three-dimensional non-uniform distribution of heat sources inside the bismuth target by dividing nested three-dimensional subspace domains, constructing a three-dimensional closed vortex loop and combining a comprehensive correction factor with a photoacoustic signal temperature effect correction, and realizes real and reliable monitoring of the axial and radial temperature gradients in the bismuth target dissolution reaction.

The application discloses a simulation method for X-ray transmission in a multi-capillary, and belongs to the technical field of data processing. The method comprises the following steps: S1, a program reads parameters of a light source and a multi-capillary structure from an input file; S2, a 4pi divergent photon source is adopted; S3, a multi-capillary structure is constructed; S4, a sub-capillary structure is constructed, and the sub-capillary is discretized into an inclined circular truncated cone structure; S5, a photon enters the capillary; S6, a collision position and an angle of the photon with a capillary wall are calculated; and S7, the photon is transmitted in the multi-capillary. The simulation method can significantly improve the calculation efficiency and reliability of simulation.

The application provides a polarization single photon source based on an anisotropic Dirac cavity, and relates to the technical field of solid-state single photon sources.The polarization single photon source based on the anisotropic Dirac cavity comprises: an anisotropic Dirac microcavity, which comprises: a C6 symmetry broken cavity photonic crystal located on the inside; a C6 symmetry cladding photonic crystal surrounding the outside of the C6 symmetry broken cavity photonic crystal; and a quantum dot coupled with the anisotropic Dirac microcavity to realize the deterministic emission of linearly polarized single photons.In the application, a single InAs / GaAs quantum dot is coupled with an anisotropic Dirac photonic crystal microcavity, the polarization selection Purcell enhancement effect of the microcavity is utilized, the deterministic single photon emission with high linear polarization degree and high single photon purity is realized, and the application can be used as a core quantum bit carrier in the fields of quantum communication, quantum calculation and quantum precision measurement.

A quantum computing system comprising a reconfigurable quantum processing unit optically coupled to a photon source and a photon detector and having a plurality of Mach-Zehnder interferometers (MZIs); and a controller communicatively coupled to the plurality of MZIs and configured to generate a control signal to alter a phase setting of at least one of the plurality of MZIs, and the plurality of MZIs configured to alter a phase of one or more photons passing through the plurality of MZIs. Further, the quantum computing system comprises a quantum memory array having a plurality of quantum memories optically coupled to the plurality of MZIs, wherein each quantum memory is configured to absorb a photon received by the quantum memory comprising quantum information and release a photon comprising quantum information of the received photon into the reconfigurable quantum processing unit.

A photon source for promoting the growth and maturation rate of members of the Plantae and Protista Kingdoms comprises a new luminous power source that provides the full range of light spectra by mimicking sunlight in a sunfleck (dappled) pattern by exciting xenon gas inside of an enclosed glass tube in instantaneous pulsed sequences. The micro-dose pulse penetrates the leaf strata to reach the maximum amount of photon processing pigments, provides the energy required for growth by enhancing photosynthetic plant functions, and significantly reducing production energy consumption. The pulse also allows the plant or Protista's photon processing compounds to process the photosynthesis reaction before the next flash, which allows for optimal use of the energy provided. The pulsed lighting sequences reduce energy consumption by up to 90%, and this makes it an excellent application for solar, wind or other green energy power thus reducing carbon footprint and making it the future of the CEA industry.

An entangled photon source for the generation of polarization entangled photon pairs comprising a laser configured to generate a polarized laser beam in the range of 630 nm to 790 nm, and a nonlinear element configured to generate photon pairs by the transmission of the laser beam, and a dichroic element configured to separate the entangled photon pairs and the laser beam. The source comprises in addition a polarization rotation element and a reflection element configured to reflect the laser beam after the first transmission through the nonlinear element for a second transmission through the nonlinear element.

A fabrication tool has at least one flat lamp photon source, or an array of flat lamps, that serve to non-thermally ablate polymer material from a surface. No photoresist is required and the desired photoablated pattern is determined by inserting a photolithographic mask between the lamp(s) and the surface to be processed. Methods of the invention pattern organic polymer and can pattern a substrate using a pattern established in an organic polymer layer on the substrate, and can also deposit materials in the pattern by breaking bonds in deposition precursors with photons from the microplasma array. Another method converts organic polymer material to have a hydrophylic surface. A tool of the invention can have width and depth comparable to a typical paperback book and a height comparable to a coffee cup.

A monolithically integrated entropy source comprising a photon source and a photon detector wherein the photon source is designed to emit photons wherein the photon source comprises a first housing wherein the first housing is formed by a first bottom surface, a first top surface and at least one first side surface interconnecting the first bottom surface and the first top surface, the photon detector is designed to detect photons emitted by the photon source, wherein the first bottom surface of the photon source is arranged towards the photon detector.

Techniques disclosed herein relate to photon sources with high spectral purity and high brightness. In one embodiment, a photon-pair source includes a pump waveguide, a first resonator coupled to the pump waveguide to couple pump photons from the pump waveguide into the first resonator, a second resonator coupled to the first resonator, and an output waveguide coupled to the second resonator. The second resonator is configured to convert the pump photons into photon pairs. The second resonator and the first resonator are configured to cause a coupling-induced resonance splitting in the second resonator or the first resonator. The second resonator and the output waveguide are configured to couple the photon pairs from the second resonator into the output waveguide. In some embodiments, the photo-pair source includes one or more tuners for tuning at least one of the first resonator or the second resonator.