68 results about "Quantum optics" patented technology

The invention discloses a three-dimensional vector holographic display device based on a medium metasurface and a display method. The three-dimensional vector holographic display device comprises a substrate and a nano structure unit on the substrate, the nano-structure units are arranged on the substrate according to specific phase distribution to form a nano-structure unit array; when light waves enter the three-dimensional vector holographic display device, the light waves are modulated by the nanostructure units, transmitted light waves are emitted through a plurality of independent space channels, adjustable patterns of different polarization states can be generated on a plurality of planes in a combined mode, and three-dimensional vector display is achieved. According to the invention, longitudinal regulation and control of amplitude, phase and polarization of light waves can be realized in a broadband range, super-surface display is expanded to a three-dimensional vector form from a two-dimensional scalar form, and the method can be applied to the fields of high-capacity optical storage, optical information encryption, quantum optical technology and the like.

The invention belongs to the technical field of quantum optics, and discloses a double-pointer weak measurement-based complex magneto-optical Kerr angle measurement method, which comprises the following steps of: placing a sample to be measured between a weak coupling unit and a system front selection state unit or between the weak coupling unit and a system rear selection state unit, and reflecting an incident light beam from the surface of the sample; the system front selection state unit is adjusted, so that the light intensity signal acquired by the light signal acquisition unit is minimum; adjusting the pre-system selection state unit to enable the polarization state of the outgoing beam to be horizontal or vertical polarization, and adjusting the post-system selection state unit to enable the polarization state of the outgoing beam to be vertical or horizontal polarization; the external magnetic field intensity is adjusted, and meanwhile, the light spot mass center offset and the light intensity are received through the light information acquisition unit; and calculating a magneto-optical Kerr rotation angle and an ellipsometry rate. The method can be used for synchronously measuring the magneto-optical Kerr angle and the ellipsometry in one instrument state, and has extremely high sensitivity.

The invention relates to the technical field of light atmosphere, and discloses a light atmosphere effect generation method, which comprises the following steps: generating an initial wave function according to an intensity field, deducing on the basis of a potential energy field to obtain a first wave function, performing intensity calculation and phase extraction from the first wave function to obtain a second wave function, updating the direction field based on the second wave function to obtain an updated direction field and an enhanced optical flow field; three core advantages of light atmosphere generation are realized, firstly, deep coupling of quantum optics and neurocognition is realized, real response of human eyes is simulated through a phase-sensitive light response model, and light atmosphere distribution is enabled to conform to quantum propagation rules and human visual cognition characteristics in combination with a cognition attention focusing mechanism of a DQN model; and 2, a dynamic self-adaptive mechanism runs through the whole process, and a light current coefficient and object motion data are adjusted in real time through the pupil diameter to feed back a new light flow field so as to ensure that the environment change can be quickly responded.

A device, method, and hybrid computing architecture for a Symbolic Photonic Logic Gate (SPLG) system that performs data processing primarily in the optical domain. The system comprises a photonic substrate, including silicon-photonics, indium phosphide, or similar optically active materials, patterned with optical waveguides and interferometric structures configured to implement logic operations through controlled optical interference, phase modulation, or non-linear optical effects. The SPLG system is configured to execute Boolean and symbolic logic functions without requiring intermediate optical-to-electrical signal conversion. In operation, information is encoded into one or more optical parameters including phase, polarization, wavelength, or amplitude, and processed within a Symbolic Optical Core optimized for linear algebraic operations such as matrix multiplication and vector transformation. The architecture further comprises an electronic control layer configured to initialize, configure, and monitor the photonic logic elements while allowing the majority of computational operations to occur within the optical domain, thereby reducing electrical interconnect congestion and resistive heating relative to fully electronic processors.

The application discloses a quantum random number generator, which uses an optical chip to replace a quantum optical system built by multiple independent optical components in an existing quantum random number generator to generate a quantum entropy source signal, meanwhile, uses an analog IC chip and a digital IC chip to replace signal processing parts such as an analog amplification filtering part, an analog-digital conversion part and a post-processing part built by multiple independent electronic chips in the existing quantum random number generator to process the quantum entropy source signal, and the optical chip, the analog IC chip and the digital IC chip are packaged on the same substrate, so that the quantum random number generator is chipped and integrated, that is, a quantum random number generator with small volume, low cost and large-scale production is provided, and can be applied to application scenarios such as mobile phones and camera encryption.

The invention provides a light field quantum state regulation and control method and device based on solid higher harmonic generation conditions, and relates to the technical field of quantum optics. The laser wavelength of the driving laser and the harmonic order of the solid higher harmonic are controlled according to the control variable strategy, and higher harmonics of different quantum states are obtained; performing quantization conversion processing on higher harmonics of different quantum states to obtain a plurality of Wigner functions used for representing light field quantum state description; and performing function feature analysis on the Wigner function to obtain a light field quantum state regulation and control result including an optical modem state and a coherent state. The invention is used for solving the technical problem that the quantum state of the light field is difficult to directionally regulate and control by using the generation condition of the solid higher harmonic in the prior art.

This application provides a quantum optical microcavity device modified with fluorinated organophosphonic acid and its fabrication method, relating to the fields of organic chemistry and optical engineering. The quantum optical microcavity device includes a microcavity body and a fluorinated organophosphonic acid monolayer attached to the surface of the microcavity body. A hydrophobic fluorinated organophosphonic acid monolayer is formed on the surface of the microcavity body through a chemical reaction between a mixed solution containing fluorinated organophosphonic acid molecules and the surface of the microcavity body. Since the active head groups of the fluorinated organophosphonic acid can form chemical bonds with –OH and Si–O–Si on the surface of silica through reaction, the adsorption of water molecules from the air onto the –OH and Si–O–Si on the surface of the silica microcavity body can be effectively suppressed, thus improving the Q-value stability of the whispering-gallery mode quantum optical microcavity device.

The invention discloses a topology protection Hong-Ou-Mandel interferometer based on a pi phase regulation and control grating, and belongs to the technical field of integrated photonics and quantum optics. The interferometer comprises a first waveguide and a second waveguide which are arranged side by side on a silicon dioxide substrate, and each waveguide comprises an input waveguide, a grating waveguide and an output waveguide. The two grating waveguides are provided with periodic notch grooves, and the positions of the notch grooves are symmetrically distributed about a waveguide center connecting line, so that a pi coupling phase difference is introduced between coupling in the two waveguides. The TE-TM coupling strength in the waveguides is enabled to be equal to the TE-TE coupling strength and the TM-TM coupling strength between the waveguides by adjusting the waveguide distance and the notch groove size, and the system enters a topological non-trivialness phase when delta phi is equal to pi, so that a compact topological boundary mode is formed. The structure provides an evolution path protected by topology for two-photon HOM interference, realizes interference visibility close to a theoretical limit, shows strong robustness for manufacturing errors and propagation distance changes, is obviously reduced in device size, and is suitable for high-density integrated quantum photon chips.

The application relates to the technical field of garbage classification processing, and discloses an intelligent garbage detection method based on light source visual lens recognition, which comprises the following steps: S1, capturing garbage and environmental image data through a visual sensor; S2, collecting images by using a quantum optics enhanced visual lens system; S3, converting the image data into a low-dimensional matrix by using a CANDECOMP / PARAFAC method; S4, inputting the low-dimensional matrix into a deep neural network for garbage recognition and classification; and S5, calculating the robot path by using a path optimization algorithm to complete a garbage grabbing task. Through the cooperative action of a quantum superposition state light source and a quantum entangled state light source, the garbage image data is subjected to enhanced processing, so that the definition and detail resolution of the image are improved, the interference of environmental noise is effectively reduced, the details and edges of the garbage object are more obvious, and the garbage classification accuracy is improved.

The invention relates to a high-modulation-efficiency phase modulator based on a silicon nitride-lithium niobate waveguide. The modulator comprises an optical transmission unit and an electric transmission unit, the optical transmission unit comprises a quartz substrate layer, a silicon dioxide buffer layer arranged above the quartz substrate layer, a composite waveguide arranged above the middle position of the silicon dioxide buffer layer, and a silicon dioxide cladding covering the outer side of the composite waveguide; the electric transmission unit comprises a metal traveling wave electrode, and the metal traveling wave electrode adopts an embedded double-layer capacitor microstructure load traveling wave electrode. By optimizing the design of the electrode structure and the waveguide structure, the modulation efficiency is remarkably improved, broadband response and low optical loss are considered at the same time, and the device is suitable for application scenes sensitive to phase modulation efficiency and power consumption, such as high-speed optical fiber communication, coherent optical transmission systems, optical phased arrays and quantum optical experiments.

The quantum optical system changes a phase of quantum interference occurring between a plurality of physical processes, in each of which a quantum entangled photon pair of a signal photon and an idler photon is generated. Each of a plurality of pixels outputs a detection signal of the signal photon in a state where a sample is arranged in an optical path of the idler photon. A processor calculates an absorption spectroscopy characteristic based on an interferogram indicating a variation in a signal intensity acquired from each of the plurality of pixels in accordance with the change in the phase of the quantum interference. The processor: applies a processing to reduce phase difference of the interferogram among the plurality of pixels; spatially integrates, over the plurality of pixels, the interferogram having gone through the processing to reduce phase differences; and calculates the absorption spectroscopy characteristic based on the integrated interferogram.

Systems and methods for detecting attacks on optical communication channels are presented. Techniques can include transmitting, from a sender to a receiver and through an optical communication channel, an optical signal, where the optical signal includes a classical optical signal representing first information and a quantum optical signal representing second information. Techniques can include detecting, by the receiver, third information from at least a portion of the quantum optical signal, and transmitting, by the receiver to the sender, the third information. Techniques can include determining, by the sender, an indication of an attack on the optical communication channel based on the second information and at least a portion of the third information. Techniques can include triggering an alarm based on the determination.

An optical circuit for time-binned quantum simulation using boson sampling can be formed with multiple circuit branches that implement different portions of a transfer matrix in parallel, facilitating high-dimensional quantum simulations while achieving low optical loss. In various embodiments, the circuit includes a quantum light source configured to generate a pulse train of time-binned photons having an associated pulse spacing between consecutive pulses, an optical splitter with variable couplers that split the pulse train between the circuit branches; and in each of the branches, one or more optical waveguide loops with optical lengths equal to integers of the pulse spacing, coupled to a main optical waveguide, and a quantum optical detector at the output of the main optical waveguide to measure the output pulse train.

The invention relates to a receiving apparatus (RX) in a quantum optical communication system (1).

The present application relates to the field of quantum information and quantum optics technology, and provides a quantum cloning and quantum cryptography attack and defense principle teaching device and teaching method.The method comprises: sequentially arranging an arbitrary polarization quantum state preparation and measurement module, a quantum cloning machine and a single photon receiving and analysis optical path module according to the optical path direction; the arbitrary polarization quantum state preparation and measurement module is used for preparing a generated single photon signal into an arbitrary polarization quantum state, and measuring the prepared arbitrary polarization quantum state; the quantum cloning machine is used for adopting a Mach-Zehnder interferometer, interfering a single photon generated by the arbitrary polarization quantum state preparation and measurement module with one photon of a quantum entanglement pair, adjusting the beam splitting ratio of the interference photon, thereby completing the approximate quantum cloning operation on the arbitrary single photon state, and measuring the quantum state output by the quantum cloning machine; and the single photon receiving and analysis optical path module is used for measuring the quantum state of the other photon of the quantum entanglement pair.

The invention discloses an electromagnetic wave phase-polarization decoupling control system, belongs to the technical field of optical communication and quantum optics, and is suitable for equipment such as a quantum communication receiver and a laser radar. The invention aims to solve the problems of high bit error rate (greater than 8%) caused by phase symbol chaos and crosstalk (crosstalk coefficient is only-25dB) caused by polarization and phase coupling in the prior art. The system realizes decoupling through two core mechanisms: one is a phase expression forced unification module which uniformly converts an input electromagnetic wave phase into a standard form e (i (kx omegat)), comprises a phase detector, a converter and a calibration unit, and eliminates symbol chaos; and the Hilbert space tensor product regulation and control hardware realizes independent regulation and control of a polarization state and a phase state through a polarization liquid crystal array, a phase modulator and a tensor product operation unit based on a quantum state tensor product principle (psi gt, = [polarization state] [phase state]), and cuts off a physical coupling path. The method has the beneficial effects that the phase symbol chaos rate is reduced to 0%, and the crosstalk coefficient is increased to-45dB; when the method is applied to quantum communication, the bit error rate is less than or equal to 1.2%, and the key distribution rate is doubled; when the method is applied to the laser radar, the ranging error is less than or equal to + / -1cm, and the haze environment target recognition rate is improved from 60% to 85%. According to the invention, efficient decoupling of phase and polarization is realized, and the performance of optical communication and quantum optical equipment is remarkably improved.

The invention provides an adjustable chiral liquid crystal quantum gate, a preparation method thereof and a quantum state preparation device. The chiral liquid crystal quantum gate is realized based on a chiral liquid crystal layer, the chiral liquid crystal layer comprises nematic liquid crystals, a right-handed dopant and a left-handed dopant, the chiral liquid crystal layer has a periodic right-handed spiral structure, and the screw pitch is changed along with the temperature change; when the chiral liquid crystal quantum gate acts on a single-photon quantum bit, the chiral liquid crystal quantum gate rotates around the z axis of the Bloch ball, and on-demand output of multiple single-photon quantum states is achieved; when the chiral liquid crystal quantum gate acts on an entangled photon pair, the chiral liquid crystal quantum gate realizes dynamic switching among various polarization entangled states while keeping non-local entanglement of the entangled photon pair, and on-demand output of various entangled quantum states is realized. Dynamic regulation and control of incident light polarization state is realized based on the chiral liquid crystal material, and the chiral liquid crystal material can be further applied to quantum state regulation and control in quantum information processing, so that a soft material optical element is successfully introduced into the field of quantum optics.

This invention discloses a calibration system and method for extremely weak light radiance based on a cascaded integrating sphere, belonging to the field of optical radiation metrology and photoelectric detection technology. The system includes a first integrating sphere, an aperture tube, and a second integrating sphere. The aperture tube achieves large dynamic range light intensity adjustment through geometric attenuation. The second integrating sphere connects both a reference detector and a high-sensitivity detector to be calibrated, enabling online calibration and dynamic range bridging under the same radiance field. By adjusting the aperture, the light flux distribution is controlled, allowing the measurement ranges of the two types of detectors to overlap. This is used to perform correction processing related to non-ideal effects of single-photon detectors and high-precision measurement of extremely weak light radiance. This invention features a compact structure, stable and reproducible attenuation, and is suitable for weak light calibration and linearity testing in fields such as quantum optics and nighttime remote sensing.

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 device and method for improving the stability of a vacuum compression state light field generator, and relates to the technical field of quantum optics. The cavity length of the vacuum compression state light field generator is locked in a closed loop mode through reflecting pump light; enabling the seed light and a vacuum compression state light field generator to resonate, matching the power and light spot modes of the seed light and the local light, and then performing coupling interference; adjusting the phase to constructive interference, and collecting an interference signal and a frequency spectrum thereof by using a Fourier real-time analysis oscilloscope so as to identify extra noise; and finally, noise is suppressed by combining air floating platform pressure optimization and negative feedback servo control system parameter adjustment, so that the stability of the vacuum compression state light field generator is improved. The stability of the vacuum compression state light field generator can be effectively improved, and the vacuum compression state light field generator can be widely popularized and applied to an experiment system for preparing a vacuum compression state light field.

The invention discloses a multi-dimensional light field modulator based on a chiral optical fiber microsphere. The multi-dimensional light field modulator comprises a multi-core chiral optical fiber and a microsphere, the multi-core chiral optical fiber is formed by twisting a multi-core optical fiber; the microsphere is arranged in an internal closed cavity of the multi-core chiral optical fiber, and the microsphere is an electromagnetic induction ball or a medium ball with a magnetostrictive effect; the multi-core chiral optical fiber enables the refractive indexes of the fiber core and the cladding to change through torsion, then the wave vector of a transmission light field is changed, the microspheres generate a magnetostrictive stress mode under the action of an external magnetic field, the magnetostrictive stress mode is coupled with the transmission light field of the multi-core chiral optical fiber, and the magnetostrictive stress mode is converted into a magnetostrictive stress mode. And multi-dimensional composite modulation of mode angular momentum, light intensity and wavelength of a light field is realized. The limitation that a traditional single waveguide device cannot achieve high-dimensional multi-mode composite modulation is broken through, multi-path modulation and multi-optical-quantity composite modulation of information in the single waveguide device are achieved, the integration degree is high, the regulation and control precision is excellent, and the device can be widely applied to the fields of optical communication, quantum optics, high-resolution imaging and the like.

The invention belongs to the technical field of quantum optics and quantum information devices, and discloses a near-infrared-mid-infrared dual-wavelength quantum polarization entangled source generating device which comprises a mounting seat, and a near-infrared light source, a mid-infrared light source, a first entangled crystal, a second entangled crystal, a core crystal module, a polarization controller and a generator are mounted and connected above the mounting seat. High-coherence pump light is output through a near-infrared light source, and the high-coherence pump light is shaped into parallel light beams through an aspheric collimating lens group and then is coupled to a first entangled crystal; under a quasi-phase matching condition, the pump light is converted into a near-infrared entangled photon pair of a communication band of 1.5-1.7 [mu] m through a spontaneous parametric down-conversion process, and then the near-infrared entangled photon pair is input into the core crystal module along a preset optical axis; a mid-infrared light source outputs mid-infrared pump light, linear polarization direction locking and polarization state fine regulation and control are completed through a polarization controller, and interference of pump light polarization fluctuation on subsequent entanglement state generation is eliminated; the regulated and controlled mid-infrared pump light is coupled to the second entangled crystal, mid-infrared entangled photon pairs in the atmosphere window wave band of 3.5-4.0 microns are generated through spontaneous parametric down-conversion, the mid-infrared entangled photon pairs are synchronously input into the core crystal module along the optical axis, and actual application and operation are facilitated.

The invention belongs to the field of nonlinear optical materials, and discloses a broadband photoresponse CuS / MXene composite nonlinear optical material and a preparation method and application thereof. According to the preparation method, few-layer Mo2TiC2 MXene, copper chloride and sodium sulfide are used as reaction raw materials, an aqueous solution containing cetyltrimethylammonium chloride is used as a reaction solution, and the catalyst is prepared through a coprecipitation method. The obtained CuS / MXene composite nonlinear optical material is of a zero-dimensional / two-dimensional heterostructure and comprises few layers of Mo2TiC2 MXene and CuS nanoparticles loaded on the surface of the Mo2TiC2 MXene. The CuS / MXene composite material has the properties of stable structure, broadband optical absorption and ultrafast carrier response, shows an excellent broadband optical nonlinear effect, can be designed into an ultrahigh-speed, high-parallelism and low-loss broadband nonlinear photonic device, and has a wide application prospect in all-optical communication, photon calculation, quantum optics and the like.

A method for robust state manipulation in quantum information processing comprises evanescently coupling a first waveguide to a second waveguide, the first and second waveguide having different geometries respectively; and providing waveguide geometries such that their coupling is detuned, the detuning being a function of the geometries, the detuned coupling thereby providing reliable population transfer between the first and second waveguides that is robust to fabrication and other errors. The method may be used to provide a quantum optical coupler.

The invention discloses an in-situ temperature sensor based on a microcavity-quantum dot coupling system and an implementation method, and belongs to the field of temperature sensors. Quantum dots and a Moire photonic crystal microcavity are arranged in a photonic crystal flat plate, laser excites the quantum dots to generate fluorescence, a fluorescence spectrum is collected to obtain a wavelength drift distance, and the temperature is obtained according to the conversion relation between the reference temperature and the wavelength drift distance and the temperature variation; the problems that a pure quantum dot temperature sensor is poor in optical field and thermal field locality, low in temperature measurement sensitivity and slow in response speed, and an existing photonic crystal-quantum dot coupling structure cannot adapt to a temperature sensing scene are solved. The method has the advantages of simple operation, high response sensitivity to temperature change, capability of realizing measurement in a relatively large temperature range, good robustness, extremely strong expandability and universality, and compatibility of a preparation process with a mature semiconductor micro-nano processing flow. The method is applied to low-temperature cavity quantum optics, semiconductor chip thermal characterization, biological living body micro-area temperature measurement and the like.

A decrease in accuracy caused by influence of noise light is suppressed.A spectroscopic device (1) includes a light source (2), a quantum optical system (4), a detection unit (6) that detects a light intensity of light output from the quantum optical system (4), and an analysis device (8), the quantum optical system (4) including one or more nonlinear optical elements (12) that generates a photon pair of idler light and signal light from the pump light in an entangled photon pair generation process, and a sample placement tool (35) that places a sample (SP) on an optical path of the idler light. The quantum optical system (4) is configured to emit first and second signal lights (s1, s2) along different optical paths, the detection unit (6) includes a beam splitter (40) that receives the first and second signal lights (s1, s2) from the quantum optical system (4), and detects a light intensity of each of two lights emitted from the beam splitter (40), and the analysis device (8) acquires an interferogram from the two lights detected by the detection unit (6).

A method for robust state manipulation in quantum information processing comprises evanescently coupling a first waveguide to a second waveguide, the first and second waveguide having different geometries respectively; and providing waveguide geometries such that their coupling is detuned, the detuning being a function of the geometries, the detuned coupling thereby providing reliable population transfer between the first and second waveguides that is robust to fabrication and other errors. The method may be used to provide a quantum optical coupler.

The application discloses an AlGaAs second-order nonlinear and linear optical waveguide integrated monolithic and a manufacturing method thereof. x Ga 1‑x As composition; the surface of the epitaxial layer is used to manufacture a photoetching mask, and then the Bragg upper reflection layer is etched to form a ridge waveguide structure comprising a second-order nonlinear waveguide region and a second-order linear waveguide region; the second-order nonlinear waveguide region is used to manufacture a photoetching mask, and then the Bragg lower reflection layer of the second-order linear waveguide region is etched to complete the manufacturing. The application can realize seamless monolithic integration of AlGaAs optical nonlinear waveguide and linear waveguide, and provides a simple and high-integration chip manufacturing method for the fields of nonlinear optics and integrated quantum optics.

The present invention relates generally to the design of quantum optical configurations and more specifically to using graph theory mapping and fidelity optimization to design optimal quantum optical configurations that have maximal fidelity between the designed optimal quantum optical configuration and the target quantum state. The target quantum state may include resource-efficient heralded multi-photonic quantum states, heralded high-dimensional entanglement, resource states for quantum gates, and high-dimensional multi-photonic GHZ states without ancilla photons.

The invention discloses a quantum sensing method for cross-class combined detection of tumor markers, which utilizes the quantum optical characteristics of an NV color center in a fluorescent nano-diamond as sensing signals to realize cross-class combined detection of two mainstream markers (miRNA and protein) in diagnosis of tumor diseases. The surface of the nano-diamond is functionally modified, and the charge state proportion situation of the NV color center is presented in a spectrum shape, so that the miRNA is detected. By constructing the magnetized gel, the detection of protein markers can be realized by utilizing an optical detection magnetic resonance (ODMR) signal of an NV color center. According to the method, on the basis that NV color center quantum has multiple optical signal characteristics, sensitive detection of miRNA-155 and MUC1 proteins is realized. The two sensing signals of the method are unisource and heterogeneous, so that the two sensing signals do not interfere with each other, and the method is suitable for sensitive and accurate detection of early tumor disease markers.