27results about "Analysis using optical pumping" patented technology

The invention relates to a method for generating a useful signal (11) from a signal (5') emitted from a spin-based quantum system (4), said method including exciting the spin-based quantum system (4) by means of an excitation light (13), exciting the spin-based quantum system (4) by means of an electromagnetic field (3) which jumps back and forth between two measurement frequencies at a modulation frequency, the two measurement frequencies having a first measurement frequency distance from an expected resonant frequency, detecting the signal (5') emitted from the spin-based quantum system (4) in order to obtain a measurement signal (7), multiplying the measurement signal (7) by a modulation signal (9) which jumps back and forth between two modulation signal states at the modulation frequency in order to generate a modulated measurement signal (7'), demodulating the modulated measurement signal (7') in order to generate the useful signal (11), determining a comparison signal, and determining whether the expected resonant frequency value is correct based on the comparison signal.

A magnetic property measurement device for a soft magnetic material includes a measurement sample magnetic field application mechanism, a diamond NVC sensor, a laser light irradiation mechanism, a microwave irradiation mechanism, an optically detected magnetic resonance spectrum measurement mechanism, and a control and data analysis mechanism, the control and data analysis mechanism is configured to execute a measurement condition input step, a magnetic property measurement step, and a data analysis step, the measurement condition includes a range of an external magnetic field H0, a magnetic permeability μsmp of a measurement sample, and a predetermined frequency sweep width Δω in a microwave, and the predetermined frequency range of the microwave in the magnetic property measurement step is a region of “ωd±Δω” based on a microwave frequency ωd of the dip obtained from a relational expression of “ωd=2.87±28×μsmp×H0”.

The invention relates to a magnetic sensor (1) having a microwave source (6) and a sensor plate (2), the sensor plate (2) having a sensor crystal (5) with at least one magneto-optical defect, an excitation light source (3), a detector (7) and at least two permanent magnets (8). The sensor crystal (5) is arranged in such a way that the microwave radiation generated by the microwave source (6) can be absorbed by the at least one magneto-optical defect of the sensor crystal (5). The excitation light source (3) is arranged to emit an excitation light beam (4) and is configured and arranged in such a way that the excitation light beam (4) emitted by the excitation light source (3) can induce emission of fluorescent radiation in the at least one magneto-optical defect of the sensor crystal (5). The detector (7) is designed and arranged in such a way that it detects the emitted fluorescent radiation. The at least two permanent magnets (8) are arranged and arranged in such a way that they generate a uniform, static magnetic field in the sensor crystal (5).

Discloses is a magnetometer and a method of carrying out magnetometry. A sensor element comprising a sheet of a 2D layered material having a photon-emitting spin-active defect is provided. The defect has a spin triplet state with first, second and third non-degenerate spin sublevels in the absence of applied magnetic field. An optically detected magnetic resonance measurement is conducted on the sensor element by subjecting the sensor element to optical excitation and photoluminescence detection whilst a variable frequency microwave signal is applied, the microwave signal causing transitions between the spin triplet state spin sublevels. The photoluminescence detection comprises: detecting a change in photoluminescence signal when the microwave signal is resonant with a transition between the spin triplet state spin sublevels; and determining a characteristic of a magnetic field based on the detected photoluminescence signals.

The invention relates to an apparatus for measuring intracorporeally generated magnetic fields, comprising: a catheter, wherein an optical waveguide device is arranged within the catheter, a sensor unit for measuring magnetic fields, wherein the sensor unit is a nitrogen-vacancy centre magnetometer which has, as a sensor medium, one or more diamond crystals having a plurality of nitrogen-vacancy centres, wherein the one or more diamond crystals are arranged within the optical waveguide device, wherein the sensor unit comprises a magnetic field generating device for generating a magnetic field in the region of the sensor medium, wherein the sensor unit has an excitation light source for radiating excitation light into the optical waveguide device in order to excite the sensor medium, wherein the sensor unit comprises a microwave source for generating microwaves in order to excite the sensor medium with microwaves, and wherein the sensor unit comprises a photodetector for detecting resonance-dependent fluorescent light from the sensor medium, and an evaluation unit which is configured to determine, based on the detected fluorescent light, a magnetic field at the respective location of the one or more diamond crystals. The invention relates to a method for measuring intercorporeally generated magnetic fields, a computer program and a machine-readable storage medium.

The invention relates to a magnetometer (1) for detecting a magnetic field, comprising an excitation light source (2) which is designed to emit an excitation beam (3), a sensor crystal (4) which has at least one magneto-optical defect, and a device (8) for generating a microwave field. The sensor crystal (4), the device (9) for generating the microwave field, and the excitation light source (2) are designed and arranged relative to one another such that the excitation light beam (3) emitted by the excitation light source (2) produces an emission of fluorescence radiation in the at least one magneto-optical defect of the sensor crystal (4), and the microwave field can be detected in the sensor crystal (4). The magnetometer (1) additionally has a detector (5), which is designed and arranged such that the detector detects the emitted fluorescence radiation, and at least two permanent magnets (6), which are arranged and designed so as to generate an at least approximately homogenous static magnetic field in the sensor crystal (4). The sensor crystal (4) and the at least two permanent magnets (6) are arranged on a common positioning element (7).

The invention discloses an in-situ electric transport and quantum magnetics collaborative characterization system, and relates to the technical field of material physical property measurement under extreme conditions, the system comprises a multi-physics field coupling module, the multi-physics field coupling module comprises an extreme pressure device, a vector superconducting magnet and a low-temperature constant-temperature device, the extreme pressure device comprises a diamond anvil cell, and the vector superconducting magnet comprises a quantum magnetic field; comprising a nitrogen vacancy color center, an electrical probe and a microstrip transmission line, the cooperative detection module comprises a magnetic detection terminal and an electrical detection terminal and is used for detecting a magnetic signal of the sample to be detected and performing in-situ measurement so as to characterize the electrical transport property; and the position adjustment and vibration isolation module comprises a vibration isolation platform, and the extreme pressure device and the magnetic detection terminal are jointly rigidly fixed on the vibration isolation platform so as to ensure the alignment stability of the micron-sized optical path. According to the invention, the submicron-level optical alignment stability can be realized while accurate loading in a low-temperature, high-intensity magnetic field and high-pressure environment can be ensured, so that the isotactic in-situ electric-magnetic collaborative data with a high signal-to-noise ratio can be obtained.

A small volume optoelectronic chip containing an LED chip having embedded therein a diamond with nitrogen-vacancy centers, wherein the LED chip generates light having a first wavelength, and the diamond with nitrogen-vacancy centers generates light having a second wavelength after excitement with light having the first wavelength.

A system for localizing a magnetic-field source, the system comprising: an optical fiber (20) containing nanodiamonds (24) having nitrogen-vacancy centers; a light source (10) optically coupled to the optical fiber (20) and configured to generate and introduce laser-excitation pulses into the optical fiber; a photodetector (13) optically coupled to the optical fiber (20) and configured to record fluorescence emitted by the nanodiamonds (24) in response to the laser-excitation pulse as a function of time, and to detect a transient dip in the recorded fluorescence intensity; a timing module (14) connected to the photodetector (13) and configured to measure a time interval between the generation of the laser-excitation pulse and the detection of the transient dip; a trigger generator (11) connected to both the light source (10) and the timing module (14) and configured to synchronize their operation; and a processing unit (15) connected to the timing module (14) and configured to determine an axial location along the optical fiber (20) corresponding to the transient dip, based on the measured time interval.

The present invention relates to a method of detecting a zero-field resonance (ZFR), comprising the steps of i) directing a pump light beam in a first direction x through a vapor cell comprising gaseous atoms, ii) applying a magnetic field component to the vapor cell parallel or antiparallel to the first direction x with different magnitudes Bx,iapp, iii) detecting light of the pump light beam directed through the vapor cell for the different magnitudes Bx,iapp of the magnetic field component applied parallel or antiparallel to the first direction x, iv) determining the maximum optical transmission Tmax and the minimum optical transmission Tmin based on the detected light, v) determining the difference between the maximum optical transmission and the minimum optical transmission D = Tmax - Tmin, vi) determining the magnitude of the x-component of an ambient magnetic field Bxext by determining the particular magnitude Bxapp of the x-component of the applied magnetic field for which the minimum optical transmission Tmin is determined, vii) repeating at least steps i) to v) while applying magnetic field components to the vapor cell in second and third directions y and z perpendicular to the first direction x with different magnitudes By,iapp and Bz,iapp, and viii) determining the magnitudes Byext and Bzext of the ambient magnetic field components in the second and third directions y and z by determining the particular magnitudes of the y- and z-components of the applied magnetic field Byapp and Bzapp for which the difference between the maximum optical transmission and the minimum optical transmission D is minimized.

The present invention relates to a method of detecting a zero-field resonance (ZFR), comprising the steps of i) directing a pump light beam in a first direction x through a vapor cell comprising gaseous atoms, ii) applying a magnetic field component to the vapor cell parallel or antiparallel to the first direction x with different magnitudes: formula (I), iii) detecting light of the pump light beam directed through the vapor cell for the different magnitudes: formula (I) of the magnetic field component applied parallel or antiparallel to the first direction x, iv) determining the maximum optical transmission Tmax and the minimum optical transmission Tmin based on the detected light, v) determining the difference between the maximum optical transmission and the minimum optical transmission D = Tmax - Tmin, vi) determining the magnitude of the x-component of an ambient magnetic field: formula (II) by determining the particular magnitude: formula (III) of the x-component of the applied magnetic field for which the minimum optical transmission Tmin is determined, vii) repeating at least steps i) to v) while applying magnetic field components to the vapor cell in second and third directions y and z perpendicular to the first direction x with different magnitudes: formula (IV) and formula (V) and viii) determining the magnitudes: formula (VI) and formula (VII) of the ambient magnetic field components in the second and third directions y and z by determining the particular magnitudes of the y- and z-components of the applied magnetic field: formula (VIII) and formula (IX) for which the difference between the maximum optical transmission and the minimum optical transmission D is minimized.

The invention relates to a device for measuring intracorporeally generated magnetic fields, comprising: a catheter, wherein a fiber optic device is arranged within the catheter, a sensor unit for measuring magnetic fields, the sensor unit is a nitrogen vacancy center magnetometer, which, as a sensor medium, comprises diamond crystals having one or more nitrogen-vacancy centers, wherein one or more diamond crystals are arranged within the optical fiber device, wherein the sensor unit comprises a magnetic field generation device for generating a magnetic field in the area of ​​the sensor medium, wherein the sensor unit comprises an excitation light source for shining excitation light into the light guide device in order to excite the sensor medium, wherein the sensor unit comprises a microwave source for generating microwaves to excite the sensor medium with microwaves, and wherein the sensor unit comprises a photodetector for detecting resonance-dependent fluorescence light from the sensor medium and an evaluation unit which is set up to determine a magnetic field at the respective location of one or more diamond crystals based on the detected fluorescence light. The invention relates to a method for measuring intracorporeally generated magnetic fields, a computer program and a machine-readable storage medium.

A light receiving device receives fluorescence emitted by a magnetic resonance member in response to excitation light and generates a fluorescence sensor signal corresponding to a fluorescence intensity. A CMR arithmetic part performs common mode rejection with respect to the fluorescence sensor signal based on a reference light sensor signal of reference light that is obtained by branching the excitation light in consideration of nonlinearity of a level of the fluorescence sensor signal corresponding to an amount of the excitation light and generates a CMR signal. An A / D converter digitizes the CMR signal. An analog / digital converter digitizes the reference light sensor signal. An arithmetic processing device derives a measurement value of a measured field based on the digitized CMR signal and the digitized reference light sensor signal.

The invention relates to a method for generating a useful signal (11) from a signal (5') emanating from a spin-based quantum system (4), comprising exciting the spin-based quantum system (4) by an excitation light (13), exciting the spin-based quantum system (4) by an electromagnetic field (3) which oscillates between two measurement frequencies at a modulation frequency, wherein the two measurement frequencies have a first measurement frequency difference from an expected resonance frequency, detecting the signal (5') emanating from the spin-based quantum system (4) to obtain a measurement signal (7), multiplying the measurement signal (7) with a modulation signal (9) which oscillates between two modulation signal states at the modulation frequency to generate a modulated measurement signal (7'), demodulating the modulated measurement signal (7') to generate the useful signal (11), and determining a reference signal.and determining whether the expected resonant frequency value is correct, based on the reference signal.

Method for manufacturing a measuring probe (14), comprising the following steps: Insertion of two optical fibers (24, 26) and two electrical conductors (30, 32) into a sleeve (36); Filling the sleeve (36) with a carrier material, wherein the carrier material surrounds the glass fibers (24, 26) and / or electrical conductors (30, 32) at least partially; Curing of the carrier material in the sleeve (36); Polishing one end of the glass fibers (24, 26), electrical conductors (30, 32) and / or the carrier material contained in the sleeve (36); Arranging an RF antenna (34) on the top; and Transferring a quantum emitter (28) to the tip; Laser writing of a first and second optical fiber structure (42, 44) for optical connection of the quantum emitter (28) to the first optical fiber (24) and to the second optical fiber (26), wherein the first optical fiber (24) is optically decoupled from the second optical fiber (26).

The invention concerns a method for nonperturbative detection of one or more magnetic inhomogeneities resulting from nano-defects in a single longitudinal anisotropic magnetic sample structure having a nanometric cross-sectional dimension. A solid-state lattice with a single spin defect is used for magnetometry assessment of the anisotropic magnetic sample structure to determine quantitative information concerning minor defects and inconsistencies in the sample structure.

A spin sensor is provided which is formed from a single diamond particle, wherein a maximum diameter of the diamond particle is greater than or equal to 0.01 µm and less than 10 µm, the diamond particle has a color center, an electronic state of the color center has a spin ground level of spin zero and a spin excitation level of spin ±1, and a spin-spin relaxation time T2 of the diamond particle is 180 nsec or more.

A magnetometer 1 comprises: a plurality of vacancy centres 3 embedded in a body of material 2; a magnet 4 to apply a bias magnetic field to the vacancy centres along a first axis; a microwave source 6

A method for non-invasive characterisation of a cell for a battery is provided, the method comprising: measuring a magnetic field generated by the cell using a plurality of magnetic field sensors positioned adjacent to the cell, the measuring producing magnetic field sensor data, wherein the measuring is performed while the cell is in a passive state; determining current density profile data across the cell based on the magnetic field sensor data; and determining a condition of the cell using the current density profile data.

A sensor system is based on diamonds with a high density of NV centers. The description includes a) methods for producing the necessary diamonds of high NV center density, b) characteristics of such diamonds, c) sensing elements for utilizing the fluorescence radiation of such diamonds, d) sensing elements for utilizing the photocurrent of such diamonds, e) systems for evaluating these quantities, f) reduced noise systems for evaluating these systems, g) enclosures for using such systems in automatic placement equipment, h) methods for testing these systems, and i) a musical instrument as an example of an ultimate application of all these devices and methods.

This invention provides a measurement method and apparatus that can significantly reduce the time required for measurement of magnetic properties using a diamond NVC sensor compared to conventional methods. [Solution] The magnetic property measurement apparatus for a soft magnetic material according to the present invention comprises a sample setting mechanism, a measurement sample magnetic field application mechanism, a diamond NVC sensor, a laser light irradiation mechanism, a microwave irradiation mechanism, a photodetection magnetic resonance spectrum measurement mechanism, and a control / data analysis mechanism. The control / data analysis mechanism is configured to perform a measurement condition input step, a magnetic property measurement step, and a data analysis step. The measurement conditions include the range of the external magnetic field H0 and the permeability μ of the measurement sample. smp , and a predetermined frequency sweep width Δω in the microwave, wherein the predetermined frequency range of the microwave in the magnetic property measurement step is "ω" in an environment of 20°C. d = 2.87 ± 28 × μ smp The microwave frequency ω can be determined from the relationship "x H0". d Based on "ω" d It is characterized by being in the region ±Δω.

A spin sensor configured from one diamond particle having a maximum diameter of 0.01 [mu] m or more and less than 10 [mu] m, the diamond particle having a center of color, the electronic state of the center of color having a spin ground state level of spin zero and a spin excitation level of spin + / -1, the spin transverse relaxation time T2 of the diamond particles is 180 nsec or more.

A magnetometer is described. The magnetometer comprises a plurality of vacancy centres embedded in a body of material, a magnet arranged to apply a bias magnetic field to the plurality of vacancy centres along a first axis, a microwave source arranged to apply a microwave field to the plurality of vacancy centres, a probe laser source arranged to apply a probe laser to the plurality of vacancy centres along or parallel to the first axis, wherein the probe laser is polarised along a second axis orthogonal to the first axis, an excitation laser source arranged to apply an excitation laser to the plurality of vacancy centres along a third axis orthogonal to the first axis, and detection apparatus for measuring a change in a plane of polarisation of the probe laser.

The invention relates to a sensor device (3) for determining and / or monitoring a process variable of a medium (5) in a container (4), comprising - a crystal (6) having at least one defect (7), - a magnetic field system (8) for generating a magnetic field, wherein the magnetic field system (8) is arranged such that a magnetic field (B) can be generated in the region of the crystal (6) and in the region of the medium (5) located within the container (4) by means of the magnetic field system (8), and wherein the crystal (6) and the magnetic field system (8) can be arranged externally on a wall of the container (4), - a detection unit (9) for detecting a magnetic-field-dependent fluorescence signal (2) from the crystal (6), wherein the detection unit (9) has an excitation unit (10) for optically exciting the defect (7) and a detector (11) for detecting the fluorescence signal (2), and - an evaluation unit (12) for determining at least one piece of information about the process variable on the basis of the fluorescence signal (2). Furthermore, the invention relates to a method for operating the sensor device (3) of the invention.

A high-frequency magnetic field generator 2 applies microwave to a magnetic resonance member 1 capable of an electron spin quantum operation using the microwave. A magnet 3 applies a static magnetic field to the magnetic resonance member 1. An irradiating device 12 irradiates the magnetic resonance member 1 with light of a specific wavelength. A flux transformer 4 senses a measurement target magnetic field using a primary coil 4a and applies an application magnetic field corresponding to the sensed measurement target magnetic field to the magnetic resonance member 1 using a secondary coil 4b. Further, the magnetic resonance member 1 is arranged at a position in a hollow part of the secondary coil 4b of the flux transformer 4 and in a hollow part of the magnet 3.

To provide an optical nuclear magnetic resonance apparatus that can be mounted on an apparatus executing an optically detected magnetic resonance method, and has a cleaning mechanism mounted thereon capable of removing an attachment on a sensor surface and can determine that contamination on the sensor surface has been removed.SOLUTION: In a component analyzer according to the present invention, a sensor has therein a defect having an electron spin causing electron spin resonance. A direction of the electron spin can be optically detected. During cleaning of the sensor, an ozone generating device and an oxygen radical generating device are driven.SELECTED DRAWING: Figure 1