26 results about "Atomic vapor" patented technology

A multimodal fusion detection apparatus and method based on optical pumping and photoacoustic imaging are provided, relating to the field of fusion detection technology. In the apparatus, the atomic vapor cell detection path and the first laser irradiation path are both directed toward a target region and at least partially overlap. In this way, the detection paths of optical pumping and photoacoustic imaging are at least partially coincident, ensuring that electrophysiological signals and blood oxygen signals originate from the same tissue region and avoiding the spacing constraints of conventional sensors. Thus, the detection path of the atomic vapor cell can be used for both magnetic field detection and photoacoustic detection, enabling simultaneous acquisition of magnetic and photoacoustic signals at a single detection point, achieving hardware reuse for multimodal fusion detection at the same location and time, reducing device size, and minimizing crosstalk among multimodal sensors.

A system for automatically locking a control laser in a Rydberg atomic sensor may comprise an atomic vapor cell, a probe laser configured to excite the atoms in the atomic vapor cell to an intermediate energy state, and a control laser configured to excite the one or more atoms in the atomic vapor cell from the intermediate energy state to a higher energy state. The light generated by the control laser may be dithered at a pre-determined frequency. The system further comprises a photodiode configured to convert light received from the vapor cell into an electrical signal, a lock-in amplifier configured to generate an error signal based on the electrical signal received from the photo diode and a received reference oscillation frequency, and a servo configured to receive the generated error signal from the lock-in amplifier and adjust a frequency of the control laser based on the received error signal.

Optical frequency reference apparatus (10) comprising - an atomic vapor cell (1), containing a vapor of reference atoms, said atomic vapor cell (1) comprising a first end (41) having a first window (4) and a second end (61), - a laser source (11) for generating a laser probe beam (3) adapted to excite a two-photon optical transition of said reference atoms, - an optical detector (14), adapted to detect a fluorescence signal emitted by said reference atoms, and - at least one reflective element (5, 15) wherein the laser source (11), the atomic vapor cell (1) and the at least one reflective element (5, 15) are configured such that, in operation, the probe beam (3) enters the atomic vapor cell (1) through said first window (4) at said first end (41) and crosses said vapor of reference atoms until said second end (61) through a defined optical path in a first forward direction (3a), the probe beam (3) is reflected backwards by said at least one reflective element (5, 15) and crosses said vapor of reference atoms a second time through the same defined optical path, in a second direction (3b) opposite to the first forward direction (3a), characterized in that the optical frequency reference apparatus (10) further comprises means (7, 9) for absorbing the reflected laser probe beam (3) exiting from the atomic vapor cell (1) according to the second direction (3b).

The low-noise atom modulation spectrum detection system comprises a signal generator, sine wave signals generated by the signal generator are divided into two paths, one path is output to a laser device, and laser with modulation information is modulated in a current control mode; and the other path provides a reference signal for demodulation of the lock-in amplifier, the output laser is divided into pump light and probe light to ensure generation of saturated fluorescence in the rubidium atom steam chamber, then a low-noise silicon photoelectric detector is used for detecting a saturated fluorescence signal, and the lock-in amplifier demodulates and outputs the modulated saturated fluorescence signal. And meanwhile, a detection path of the saturated absorption spectrum is reserved, so that comparison with a modulated saturated fluorescence spectrum signal is facilitated. According to the invention, the requirement on the size of the atom steam chamber is obviously reduced, and the method is suitable for the application scenes of the Suppler spectrum, such as high-sensitivity, low-noise, anti-interference and miniaturized laser frequency stabilization and atom hyperfine structure detection.

A system (30) for controlling, regulating or authenticating a timer comprises means (31) for measuring the frequency signal and / or rate of one or more timers based on a time reference provided by an optical atomic clock (10) comprising an atomic vapor chamber (1), the atomic vapor chamber (1) comprises a hermetically sealed enclosure (8) defining a volume containing a vapor of a reference atom (2), the hermetically sealed enclosure (8) comprising an optical inlet (3) allowing transmission of a probe beam adapted to excite an optical transition of the reference atom (2) and an optical outlet (4) allowing transmission of a fluorescence signal from the reference atom (2), the hermetically sealed housing (8) further comprises a wall (5) through which the fluorescent signal can penetrate, said wall (5) being coated on its outer side with a coating (6) which is reflective to the fluorescent signal.

Techniques are provided self-aligning components of an atomic sensor including a first cover, a second cover, a structure-cell including a structure and a cell, containing a vapor of atoms, in the structure. Atomic sensor components are aligned in a cover in which they are form fitted into a recess or mounted on a surface of a pedestal. Each cover is aligned with the structure-cell or component(s) therein using guide holes in each of the cover and the structure-cell into each of which an alignment pin is inserted. Due to such alignments, each component is self-aligned with respect another component or to a region of the structure-cell, e.g., the cell or an atomic vapor in the cell.

The present invention provides an optical atomic clock system comprising: an optical pulse generation component adapted to generate a clock interrogation optical pulse; the atomic furnace is used for generating atomic steam; each subsystem is suitable for capturing and preliminarily cooling atoms in the received atom steam to obtain a cold atomic group, and is used for trapping the atoms in the cold atomic group; the subsystem is constructed to allow clock polling pulse light to enter, so that atoms in a ground state interfere with each other under the action of two clock polling light pulses; the processing component is used for obtaining an error signal of the subsystem according to the interference result in any subsystem; a timing controller configured to: cause atoms within the at least one subsystem to be in an illumination phase of the clock interrogation light pulse or in a free evolutionary phase between two illumination of the clock interrogation light pulse; the frequency of the clock interrogation light pulse is corrected according to the respective error signals of the plurality of subsystems.

Systems and methods for generating an entangled pair of bichromatic photons are described. The system includes an atomic vapor cell containing atoms of an atomic species located within beam paths of a first and second laser beam. The first and second laser beams are tuned to first and second wavelengths that are resonant with first and second atomic transitions of the atomic species such that the first and second laser beams cause a four-wave mixing process within the atomic vapor cell. As a result of the four-wave mixing process, entangled photon pairs having a third and fourth wavelength are generated and output from the atomic vapor cell. The first and second wavelengths may be selected to create electromagnetically-induced transparency (EIT) within the atomic vapor cell, the EIT creating a transparent medium within the atomic vapor cell at the third wavelength, improving spectral brightness and / or photon linewidths.

A communication method and a related device are applied to the field of communication. In the method, a first device receives a first microwave signal to be detected; the first device sends a first laser signal to a first atomic steam cavity to obtain first signal intensity, the first signal intensity is the signal intensity of the first laser signal penetrating through the first atomic steam cavity, the frequency of the first laser signal changes periodically, and the transmissivity of the first atomic steam cavity is related to the first microwave signal; the first device determines a first attribute of the first microwave signal according to the first signal intensity and the frequency of the first laser signal, and the first attribute comprises the signal intensity or the signal frequency so as to increase the signal bandwidth of microwave signal detection.

The application discloses a microwave electric field measuring probe device and a use method thereof. The device comprises an atomic vapor chamber, a double-wavelength spectrometer prism connected to the end of the atomic vapor chamber, an input coupling light fiber collimation assembly and an output signal light fiber collimation assembly connected to the end of the double-wavelength spectrometer prism away from the atomic vapor chamber, an input probe light fiber assembly connected to the atomic vapor chamber, the input probe light fiber assembly connected to the end of the atomic vapor chamber away from the double-wavelength spectrometer prism, the input probe light fiber assembly, the output signal light fiber collimation assembly and the atomic vapor chamber arranged on the same axial line, probe light capable of passing through the double-wavelength spectrometer prism into the output signal light fiber collimation assembly, and coupling light entering the atomic vapor chamber capable of coinciding with the probe light capable of passing through the double-wavelength spectrometer prism in the atomic vapor chamber. The purpose of improving light collection efficiency and use flexibility is achieved.

Techniques for facilitation the storage and retrieval of the qubits in a hot atomic vapor system are described herein. The techniques comprising, transmitting a first control pulse having a bandwidth that is based on a bandwidth of the optical qubit to modify transmission properties of the atomic vapor system: receiving the optical qubit at the atomic vapor system; transmitting a second control pulse having properties based on a target bandwidth for a retrieved optical qubit to modify transmission properties of the atomic vapor system; and isolating the retrieved optical qubit from the control laser.

A communication method and a related apparatus, which are applied to the field of communications. In the method, a first apparatus receives a first microwave signal to be measured; the first apparatus sends a first laser signal to a first atomic vapor cavity, so as to obtain a first signal strength, wherein the first signal strength is the signal strength of the first laser signal after the first laser signal passes through the first atomic vapor cavity, the frequency of the first laser signal changes periodically, and the transmittance of the first atomic vapor cavity is related to said first microwave signal; and the first apparatus determines a first attribute of said first microwave signal on the basis of the first signal strength and the frequency of said first laser signal, wherein the first attribute includes a signal strength or a signal frequency, so as to increase signal bandwidths for microwave signal measurement.

A system and method are provided for generating entangled photon pairs containing two photons having different wavelengths. The technique involves pumping an atomic vapor of an alkali species using a pump laser and a coupled laser configured to drive a spontaneous four-wave mixing process within the atomic vapor. The pump laser and the coupled laser are detuned with respect to atomic transitions of the alkali species, thereby increasing the brightness of the entangled photon pair source.

A method of measuring an external magnetic field using an atomic magnetometer comprises: using a polarized pump beam 1 to spin-polarise the atomic vapour; magnetising the polarized atomic vapour by a

What is needed is an optical scheme that provides high collection efficiency while reducing the effects of the vapor cell heating the temperature-sensitive photodetector.SOLUTION: The system for controlling, adjusting or certifying the timepiece includes a means for measuring a frequency signal and / or a rate of the timepiece or several timepieces based on a time reference provided by an optical electronic timepiece 10. Wherein the optical electronic watch comprises an atomic vapor cell 1, the atomic vapor cell comprising a sealed enclosure defining a volume containing a reference atomic vapor, the sealed enclosure comprising an optical inlet 3 allowing transmission of a probe beam adapted to excite an optical transition of the reference atoms and an optical outlet 4 allowing transmission of a fluorescence signal from the reference atoms, the sealed enclosure further comprising a wall 5 transparent to the fluorescence signal and coated on its outside with a coating reflecting the fluorescence signal.SELECTED DRAWING: Figure 5

A method for atom-based closed-loop control includes exciting atoms of a gas into one or more Rydberg states, applying one or more signal processing functions to the one or more Rydberg states, and regulating a characteristic of the applied one or more signal processing functions based on, at least in part, a response of the one or more Rydberg states to the one or more signal processing functions. A system for internal quantum-state-space interferometry includes an atomic receiver, an interferometric pathway, and a detector. The interferometer includes an atomic vapor with first atomic states and second atomic states. The interferometric pathway from RF phases between the first and second atomic states is closed by a quantum-state-space. The detector is configured to detect a readout of an interferometric signal. Embodiments include atom-based automatic level control, baseband processors, phase-locked loops, voltage transducers, raster RF imagers and waveform analyzers.

An exemplary embodiment of the present disclosure provides a chip-scale atomic beam system comprising an atomic vapor source, a plurality of channels, and a propagation chamber. The atomic vapor source chamber can comprise an atomic vapor source configured to emit an atomic vapor. The plurality of channels can have first ends and second ends. The first ends can be in fluid communication with the atomic vapor source chamber. The plurality of channels can be configured to collimate the atomic vapor as it moves through the plurality of channels from the first ends to the second ends. The propagation chamber can be in fluid communication with the second ends of the plurality of channels. The propagation chamber can have an internal pressure less than an internal pressure of the atomic vapor source chamber to enable the collimated atomic vapor to propagate through the propagation chamber.

The invention relates to the technical field of micro-nano optics and atomic devices, in particular to a chip-level atomic diffraction optical element and a preparation method thereof. Comprising an SOI wafer, a getter pill chamber, an alkali metal release pill chamber, a diffraction grating, upper cover plate glass and lower cover plate glass, the getter pill chamber, the alkali metal release pill chamber and the diffraction grating are respectively arranged in the getter pill area, the alkali metal release pill area and the diffraction grating area, the getter pill chamber and the alkali metal release pill chamber penetrate through the SOI wafer, the getter pill chamber is communicated with the alkali metal release pill chamber, the alkali metal release pill chamber is communicated with the diffraction microstructure, and the diffraction microstructure is communicated with the diffraction microstructure. Getter pills are sealed in the getter pill chamber, and alkali metal release pills are sealed in the alkali metal release pill chamber. According to the original, atom steam is sealed in an unprocessed diffraction structure, a unique interference spectrum is generated, and wide-bandwidth and high-precision laser frequency offset locking under the condition of no magnetic field is realized.

The invention discloses a high-sealing miniature atomic gas chamber for quantum sensing, which sequentially comprises a first glass substrate, a second glass substrate and a third glass substrate from top to bottom, the second glass substrate is internally provided with an atmosphere chamber cavity for accommodating buffer gas and atom steam, a small rubidium source cavity for placing a solid rubidium source and a micro-pore channel for connecting the large cavity and the small cavity to release rubidium atoms; the light-passing windows of the first glass substrate and the third glass substrate are respectively aligned with the atmosphere chamber cavity to form a double-end optical path; the invention further discloses a manufacturing method. According to the invention, a three-layer glass structure is adopted, femtosecond laser cutting and welding are carried out, local gold plating is carried out to enhance absorption, and the high-sealing micro atomic gas chamber is suitable for high-precision quantum sensing equipment such as chip-level atomic clocks, atomic magnetometers and quantum gyroscopes.

The invention belongs to the technical field of quantum precision measurement, and particularly discloses a high-precision cascade temperature control atomic furnace device and a use method thereof.The device comprises a furnace body, a crucible, a water cooling system and a heat shielding layer; wherein the furnace body is used for placing a crucible; the crucible is used for placing metal elements and heating the metal elements to generate atomic vapor to form atomic beams; the heat shielding layer is used for shielding the heat flow influence of the outside on the atomic beam current; the water cooling system is used for being arranged on the outer side of the heat shielding layer to ensure that the outer layer of the heat shielding layer is in a constant temperature state, and unstable heat exchange between the heat shielding layer and the external environment is completely eradicated; the technical problem that the temperature control of an atomic beam furnace is affected by external environment fluctuation caused by direct contact between heat shielding layers arranged in an atomic beam furnace vacuum device is solved.

A method for integrating an alkali metal into a vapor cell may include forming an aperture in each substrate of a semiconductor wafer, the wafer comprising a plurality of substrates, each substrate having a first surface and a second surface opposite the first surface and an aperture through the substrate, depositing, within each aperture, a metal including an alkali metal alloy including an alkali metal and one of Gold (Au), Silver (Ag), Copper (Cu), Palladium (Pd), Platinum (Pt) or Aluminum (Al) as an alloying metal, sealing the aperture of each substrate to form a sealed chamber containing the alkali metal alloy, singulating the semiconductor wafer to separate the substrates as a plurality of individual vapor cell devices, and heating the alkali metal alloy to release the alkali metal within the sealed chamber.

The invention relates to an atomic vapor cell (2), comprising: a substrate (8) having a window (8a), the substrate (8) preferably being made of silicon, a first and a second optical component (9a, 9b) arranged on opposite sides of the substrate (8), the window (8a) in the substrate (8) together with the optical components (9a, 9b) delimiting an atomic vapor chamber (7). The second optical component (9b) has a reflective surface (12a), preferably made of silicon, configured to reflect pump light propagating within the atomic vapor chamber (7), in particular at least a portion of a laser beam (4) that enters the atomic vapor chamber (7) from the first optical component (9a). The invention also relates to a sensor device (1) comprising such an atomic vapor cell (2).

Atomic vapor cell (1), comprising a hermetically sealed enclosure (8) defining a volume containing a vapor of reference atoms (2), said hermetically sealed enclosure (8) comprising an optical inlet (3) allowing the transmission of a probe beam adapted to excite an optical transition of said reference atoms (2), and an optical outlet (4) allowing the transmission of a fluorescence signal from said reference atoms (2), characterized in that said hermetically sealed enclosure (8) further comprises a wall (5), transparent to said fluorescence signal, which is coated on its outer side with a coating (6) reflective to said fluorescence signal.

This application discloses a Rydberg atom electric field readout system and method based on weak measurement technology. A readout architecture combining Rydberg atom electric field sensing and optical weak measurement is constructed. Specifically, a weak measurement readout link is established by a pre-selection module and a post-selection module, enabling coordinated setting of the pre-selection and post-selection states. The probe light and coupling light act together on the Rydberg atomic vapor cell, allowing the atomic energy level response within the Rydberg atomic vapor cell induced by the measured electric field to be mapped as a change in optical field polarization. This effectively suppresses technical noise introduced during measurement and amplifies the signal using weak measurement technology. Therefore, the system's detection sensitivity to the electric field is improved, and the readout accuracy of the electric field signal is significantly enhanced.

System (30) for the control, adjustment or certification of timepieces comprising means (31) to measure the frequency signal and / or the rate of a timepiece or of several timepieces, based on a time reference provided by an optical atomic clock (20), said optical atomic clock (20) comprising an optical frequency reference apparatus (10) which comprises : - an atomic vapor cell (1), containing a vapor of reference atoms, said atomic vapor cell (1) comprising a first end (41) having a first window (4) and a second end (61), - a laser source (11) for generating a laser probe beam (3) adapted to excite a two- photon optical transition of said reference atoms, - an optical detector (14), adapted to detect a fluorescence signal emitted by said reference atoms, and - at least one reflective element (5, 15) wherein the laser source (11), the atomic vapor cell (1) and the at least one reflective element (5, 15) are configured such that, in operation, the probe beam (3) enters the atomic vapor cell (1) through said first window (4) at said first end (41) and crosses said vapor of reference atoms until said second end (61) through a defined optical path in a first forward direction (3a), the probe beam (3) is reflected backwards by said at least one reflective element (5, 15) and crosses said vapor of reference atoms a second time through the same defined optical path, in a second direction (3b) opposite to the first forward direction (3a), characterized in that the optical frequency reference apparatus (10) further comprises means (7, 9) for absorbing the reflected laser probe beam (3) exiting from the atomic vapor cell (1) according to the second direction (3b).

The invention discloses a miniature atomic gas chamber for a magnetometer, which sequentially comprises a first glass substrate, a second glass substrate and a third glass substrate from top to bottom, an atmosphere chamber cavity for accommodating buffer gas and atomic vapor, a small rubidium source cavity for placing a solid rubidium source, and a micro-pore channel for connecting the large cavity and the small cavity to release rubidium atoms are respectively arranged in the second glass substrate; parylene coatings cover the middle areas, except the gold films, of the first glass substrate and the third glass substrate and the inner surfaces of all cavity pore channels, and light passing windows of the first glass substrate and the third glass substrate are aligned with the cavity of the atmosphere chamber to form a double-end optical path; the invention further discloses a manufacturing method. According to the method, the poly-p-xylylene film is selectively deposited in the key area, so that the inner surface of the atomic gas chamber is efficiently passivated, and meanwhile, the packaging strength and the optical transmittance are not influenced.