48 results about "Optical lattice" patented technology

The invention provides a multi-focus excitation confocal fluorescence microscopic imaging flow cytometry screening method. The method is characterized in that a laser beam generates three laser beams through a spatial light modulator, and the three laser beams are coherently superposed in a focal plane of a microscope objective to generate a two-dimensional optical lattice light field. And after the other laser beam is shaped by the cylindrical lens, linear laser optical tweezers are realized through the microscope objective, cells to be detected in an imaging detection area of the micro-flow chip are captured, and accurate active optical control on the rotation angle of the cells to be detected is realized. In a cell rotation process, a two-dimensional optical lattice light field rapidly scans in a focal plane at different angles, and a fluorophore in the cell is excited to generate a fluorescence signal. The confocal pinhole array installed at the position conjugate with the focal plane eliminates background fluorescence, a high-spatial-resolution fluorescence image of a three-dimensional structure in the cell is obtained, and cell screening is achieved. The method provided by the invention has the characteristics of high detection rate, high accuracy and the like, and has wide application prospects in the research fields of biology, medicine and life science.

A method of transporting atoms within an optical lattice may include: interfering two opposing laser beams whose focal points overlap with one another to form an optical lattice; and transporting one or more atoms by: translating the phase of the optical lattice; and translating the foci of the two opposing laser beams.

This atom trap device 10 for trapping atoms comprises an atom trap unit 16 on which an atomic gas beam is incident. The atom trap unit 16 includes a plurality of optical elements that form a laser light group 18, and a magnetic field generation unit 22. The magnetic field generation unit 22 is provided with at least two spiral coils and, if necessary, a tapered solenoid coil, and optimizes a magnetic field in a guide direction. The spiral coils are configured so that the tip becomes thinner and the winding density becomes sparse as the atoms advance in the direction in which the atoms are guided. The spiral coils are arranged so as to face each other so that an interval therebetween becomes narrower as the atoms advance in the direction in which the atoms are guided. The tapered solenoid coil generates a magnetic field that optimizes the guiding of the atoms and the laser cooling during the guiding by adjusting the component in the direction in which the atoms of the magnetic field generated by the spiral coils are guided. The atom trap unit 16 may also include a baseball coil instead of the spiral coils and the tapered solenoid coil.

A high-temperature tank (116) includes an optical window which transmits a laser (132) and is provided at one end, and a right-angle conical mirror (102) which is provided at the other end, has an opening (106) at the apex and which reflects laser light (132) incident from the optical window towards the one end in an area other than the opening (106). A magnetic field generator (112) generates a magnetic field in the region of intersection of the laser reflected by the right-angle conical mirror (102). A magnetic field gradient relaxation module (130) generates a relaxation magnetic field which relaxes the gradient of the magnetic field generated by the magnetic field generator (112).

The application discloses a controllable adjustment method and system for a spatial optical soliton motion state, and belongs to the optical field, and comprises the following steps: periodically modulating a transverse refractive index and a nonlinear coefficient in an optical lattice; constructing a nonlinear Schrodinger equation for describing a light beam transmission characteristic based on the optical lattice subjected to the periodic modulation; solving the nonlinear Schrodinger equation by using an equivalent particle method to obtain an optical soliton center position; and based on the optical soliton center position, completing controllable adjustment of the spatial optical soliton motion state through numerical simulation verification. The application periodically modulates the transverse refractive index and the nonlinear coefficient in the optical lattice, derives a new nonlinear Schrodinger equation, solves the nonlinear Schrodinger equation by using the equivalent particle method, analyzes several states of the optical soliton transmission in the optical lattice, and verifies the correctness of the equation through numerical simulation, so that the motion trajectory control problem of the optical soliton transmission in the optical lattice is solved.

To achieve Ramsey spectroscopy while effectively suppressing the Doppler effect.SOLUTION: A Ramsey spectroscopic device 1 includes: an optical path 10; an optical path length stabilizing circuit 30 that stabilizes the length of the optical path 10; a modulator 20 that is optically connected to the optical path 10, generates, in a pulse shape multiple times, a resonant laser beam at a first frequency f1 that causes resonance of atoms, molecules, or ions, which are a spectroscopic target, and generates a non-resonant laser beam at a second frequency f2 that does not cause resonance; and a spectroscopic unit 200 that spectroscopically disperses the spectroscopic target. The spectroscopic unit detects a state change of the spectroscopic target according to the frequency f1 by irradiating the spectroscopic target with the resonant laser beam.SELECTED DRAWING: Figure 1

Provided is an apparatus and method in which, in a first region that traps atoms in a first state by a first light and a magnetic field, atoms are optically pumped into a second state and thereby trapped by magnetic force. The atoms in the second state trapped in the first region are moved from the first region to a second region by force of gravity or the radiation pressure from second light. In the second region, the second light is radiated on the atoms in the second state, and the atoms in the second state are thereby cooled. The atoms are optically pumped into a third state that is insensitive to magnetic fields and thereby released from a magnetic trap and transported to a post device by a moving optical lattice or an optical dipole guide.

The invention discloses an absolute gravimeter based on an optical lattice clock and a working method thereof, and belongs to the technical field of gravity measurement. The absolute gravimeter comprises an optical lattice clock physical device, a lattice light laser, a first polarization beam splitter prism, a first optical reference cavity, a second polarization beam splitter prism, an optical frequency comb, a first acoustic optical modulator, a first linear polarization polarizer, a convex lens, a concave reflector, a clock laser laser, a third polarization beam splitter prism and a second optical reference cavity. And a second acousto-optic modulator and a second linear polarization polarizer. Different from a traditional absolute gravimeter based on laser interference and atom interference, the absolute gravimeter provided by the invention has the advantages that the gravitational acceleration sensed by atoms can be determined by measuring the Watille-Stark sideband spacing in a shallow light lattice and the lattice light wavelength along the gravity direction of the light lattice; the absolute gravimeter has the potential of reducing the measurement error of gravity acceleration to 0.1 mu Gal or even lower, and the precision of the absolute gravimeter is higher than that of a traditional absolute gravimeter by more than one order of magnitude.

The invention relates to the technical field of optical clock metering instruments, in particular to a microscopic particle mass measurement method and system based on an optical lattice clock, and the method comprises the steps: forming a one-dimensional horizontal shallow light lattice to constrain a to-be-measured microscopic particle based on an optical lattice clock platform; firstly, to-be-measured particles are subjected to laser cooling and then loaded to optical lattices, and the to-be-measured particles are prepared to a ground state single Zeeman sub-energy level through optical pumping. Then, modulating a beam of lattice light in the one-dimensional horizontal shallow light lattice to enable the lattice light to periodically shake; then, determining the line widths of clock transition spectral lines of the particles to be measured under different modulation amplitudes, and finding out the critical modulation amplitude corresponding to the minimum line width; and finally, according to the critical modulation amplitude and the lattice light wavelength, accurately deducing the absolute mass of the microscopic particles imprisoned by the light lattice.

The invention particularly relates to a method for improving the frequency measurement accuracy of an optical lattice clock in a microgravity environment, which comprises the following steps of: splitting two beams of lattice light through a lattice light laser, respectively splitting two beams of lattice light from each beam of lattice light, and forming two one-dimensional horizontal optical lattices by four beams of lattice light; wherein a certain distance exists between the beam waist positions of the two one-dimensional horizontal optical lattices in the vertical direction, the midpoint position of the two one-dimensional horizontal optical lattices is the position of a magnetic field zero point in the magneto-optical trap, the projections of the axial directions of the two horizontal optical lattices in the vertical plane are parallel to each other, and the projections of the axial directions of the two horizontal optical lattices in the horizontal plane are perpendicular to each other; an acousto-optic modulator with identical parameters is loaded on a light path of each beam of lattice light and is used for linear frequency shift and modulation of lattice light frequency; two beams of clock laser are split by a clock laser light source to respectively excite different atomic groups in two one-dimensional horizontal optical lattices. Differential comparison of transition frequencies of different atomic group clocks is realized by synchronously detecting transition spectrum lines of different atomic group clocks, so that common-mode noise in an optical clock system is suppressed. According to the method, the optical lattice clock with ultra-high frequency measurement precision in a microgravity environment can be realized.

In the current space navigation, communication, and defense technologies, it is difficult to integrate local control of time, gravity operation, use of dark matters, and communication with the outer space (the Buddhist monk Tenkai's gyrus), and intergalaxy communication, ultrahigh-speed movement, and creation of a time acceleration / deceleration space cannot be realized by modern technologies.SOLUTION: The present invention is a future note related to an ultra-future space technology capable of integrally operating time, gravity, and material behavior by performing local and large-scale dark matter control by a BHc / WHc gate based on a dark matter fluid space model and a space gate theory.SELECTED DRAWING: None

According to the present invention, in a first region that traps atoms in a first state by means of first light and a magnetic field, atoms are optically pumped into a second state and thereby trapped by magnetic force. The atoms in the second state trapped in the first region are moved from the first region to a second region by means of force of gravity or the radiation pressure from second light. In the second region, the second light is radiated on the atoms in the second state, and the atoms in the second state are thereby cooled. The atoms are optically pumped into a third state that is insensitive to magnetic fields and thereby released from a magnetic trap and transported to a post device by means of a moving optical lattice or an optical dipole guide.

The invention relates to a light guide piece assembly, an atmosphere lamp special-shaped structure and an atmosphere lamp, the light guide piece assembly comprises a light guide piece, a plurality of optical lattice points are evenly arranged on the back face of the light guide piece at intervals, and light rays are reflected after reaching the optical lattice points and are emitted out from the front face of the light guide piece. The light guide sheet assembly has the beneficial effects that the structure is simple, the design is reasonable, and the provided light guide sheet assembly can realize integral uniform light emitting, so that the uniform light emitting effect of the special-shaped light emitting sheet is realized; in addition, the modeling of the provided atmosphere lamp can break through the space structure limitation of the atmosphere lamp, the modeling freedom degree is greatly improved, and the competitive advantage of low cost is kept. Meanwhile, according to the scheme of the atmosphere lamp, the problem of a dark area of a traditional atmosphere lamp due to structural limitation can be solved, and the overall attractive effect of the atmosphere lamp is achieved.

A method for changing an inter-particle distance (D) between particles (1) arranged in a particle array (2) is provided, the method comprises creating a primary optical lattice (10), loading the particles (1) into the primary optical lattice (10) such that the particles (1) are trapped in the primary optical lattice (10), changing a primary-lattice spacing (L1) of the primary optical lattice (10) to change the inter-particle distance (D), creating an auxiliary optical lattice (20), ramping up the auxiliary-lattice and ramping down the primary optical lattice until the particles (1) are trapped in the auxiliary optical lattice (20), setting the primary-lattice spacing (L1) to a different primary-lattice spacing value, ramping up the primary-lattice and ramping down the auxiliary lattice (20) until the particles are trapped in the primary optical lattice (10) again.

An electronic state splitter for atoms comprises an atom supplier, an atom movement path, a probe laser source, and a magnetic field generator. The atom supplier supplies atoms moving at a constant velocity along the atom movement path. The probe laser source supplies a probe laser propagating in the atom movement path in the same direction as or opposite to the motion of the atoms on the same axis as the atom movement path. The magnetic field generator generates a magnetic field orthogonal to the atom movement path in the atom movement path to mix the wave function of the clock upper state with the electronic state allowing electric dipole transitions, allowing pulsed excitation of clock transitions by the probe laser uniform in time and space. Accordingly, continuous spectroscopy of atomic transitions and frequency control of the probe laser are possible, which improves the stability of the atomic clock.

The present application relates to a kind of gravity potential measurement system, method and ore body detection method, wherein the method includes: reference station optical lattice clock is used to generate reference light frequency signal;At least one mobile station optical lattice clock is used to generate local light frequency signal;Reference station optical frequency comb is used to coherently map reference light frequency signal to radio frequency band, and output reference frequency signal;Transmission link is used to coherently transfer reference frequency signal to mobile station optical frequency comb;Mobile station optical frequency comb is used to coherently restore received reference frequency signal, obtain the restored light frequency signal consistent with the frequency of reference light frequency signal, restore light frequency signal and local light frequency signal are frequency-mixed, and the frequency offset generated by gravitational redshift effect is output;Data processing module is used to convert the frequency offset into the gravitational potential difference between the position of reference station optical lattice clock and mobile station optical lattice clock.The present application can improve the reliability and practicality of gravity potential measurement.

A photonic chip includes a substrate and several nanophotonic devices extending laterally away from an edge of the substrate. Each nanophotonic device is free-standing where it extends laterally past the edge of the substrate, with each neighboring pair of nanophotonic devices forming a gap therebetween. Atoms trapped in optical tweezers may be transported into the gap and close enough to a nanophotonic device that the atoms strongly couple to the nanophotonic device. Each nanophotonic device may include a waveguide, resonator, coupler, or a combination thereof. To excite modes of a nanophotonic device, a free-space optical beam may be coupled into a distal end of the nanophotonic device. A top face of each nanophotonic device may be reflective to create an optical lattice over the top face. An atom may then be trapped in the potential minimum of the optical lattice that is closest to the top face.

The invention discloses an on-chip optical system based on linear gradient device design, which is used for generating a coherent optical pattern with a sparse lattice structure. The cross section of the on-chip device sequentially comprises a waveguide layer, a bottom cladding layer and a substrate layer from top to bottom, a plurality of input waveguides are used, a linear gradual change device is coupled with an on-chip system, input light is guided into an interference area, and an optical lattice structure with specific symmetry is generated. Through the disclosed calculation method, a specified coherent lattice structure can be obtained by calculating a corresponding light beam configuration scheme. According to the method, while the periodicity and symmetry of the crystal lattice are kept, the movement of the crystal lattice pattern on a two-dimensional plane can be realized by regulating and controlling the phase of the input light beam through the phase modulator. Compared with a traditional method, the system has the advantages of being compact in structure, high in interference efficiency, flexible and adjustable in pattern and the like, and is suitable for application of biosensing, quantum calculation, microscopic imaging and the like.

Systems, methods, and computer-readable media for implementing non-classical computing may comprise generating an array of atoms comprising greater than 150 atoms and a fill factor of greater than 95% occupancy, wherein the plurality of atoms are trapped by a cavity-enhanced optical lattice and one or more optical tweezers.

A dual frequency laser for a dual mode optical lattice atomic clock is provided, which includes a 532 nm pump laser source, a beam splitter set, a dichroic mirror, a titanium sapphire crystal, a birefringent crystal, an electro-optic crystal, a concave reflector and a PZT. The dichroic mirror and the concave reflector form a first resonant cavity configured to generate a laser; the beam splitter set is configured to split a collimated pump beam into two spatially separated pump beams; an optical axis of the birefringent crystal generates propagation paths for ordinary ray and extraordinary ray within the same cavity to form two eigen modes; the electro-optic crystal is configured to add an electric field externally in a direction parallel to an electric vector of the ordinary ray or the extraordinary ray; and the PZT is combined with the electro-optic crystal to regulate two laser frequencies simultaneously.

A sample reservoir (104) containing a sample (118), a nozzle (106), and a heated element (108) are arranged in a vacuum chamber (102). An induction coil (114) is located on the outside of the vacuum chamber (102). The heated element (108) is located around the sample reservoir (104) and the nozzle (106). Electromagnetic power is wirelessly transferred from the induction coil (114) to the heated element (108), whereby the heated element (108) is heated. Heating of the heated element (108) causes the sample reservoir (104) and the nozzle (106) to be heated, whereby the sample (118) in the sample reservoir (104) is heated. An atomic beam generated by the heating of the sample (118) is emitted from the nozzle (106).

A sample reservoir containing a sample, a nozzle, and a heated element are arranged in a vacuum chamber. An induction coil is located on the outside of the vacuum chamber. The heated element is located around the sample reservoir and the nozzle. Electromagnetic power is wirelessly transferred from the induction coil to the heated element, whereby the heated element is heated. Heating of the heated element causes the sample reservoir and the nozzle to be heated, whereby the sample in the sample reservoir is heated. An atomic beam generated by the heating of the sample is emitted from the nozzle.

The atomic electronic state separator (1) of the present invention includes: an atomic supply unit (11), an atomic movement path (12), a probe laser source (13), and a magnetic field generating unit (M). The atomic supply unit (11) supplies atoms that move in the atomic movement path (12) at a certain speed. The probe laser source (13) supplies a probe laser that propagates coaxially with the atomic movement path (12) in a direction opposite to or the same as the direction of atomic movement. The magnetic field generating unit (M) generates a magnetic field orthogonal to the atomic movement path (12) in the atomic movement path (12) and mixes it with the wave function of the electronic state that allows electric dipole transitions, thereby enabling pulse excitation of clock transitions based on the same probe laser in time and space. Alternatively, a magnetic shielding member can pulse excite clock transitions by shielding the magnetic field applied in the atomic movement path (12) and spatially changing the Zeeman frequency shift, thereby enabling pulse excitation of clock transitions by the same probe laser in time and space. As a result, it is possible to continuously perform spectral analysis of atomic transitions and frequency control of the detection laser, thereby improving the stability of the atomic clock.

The application discloses a method for preparing a two-dimensional ultracold atomic gas by optimizing adiabatic compression, and belongs to the technical field of ultracold atomic physics and optical lattice. The method takes the quantum adiabatic evolution of a three-dimensional ultracold atomic gas in an adjustable period optical lattice as a physical model basis, and equivalently describes the motion of atoms in the lattice bound direction as a one-dimensional quantum harmonic oscillator system varying with an external parameter. In the lattice compression process, the instantaneous energy level structure of the system evolves with time, and the minimum energy gap region between the lowest energy level and the first excited state is the main source of non-adiabatic transition. A non-adiabatic parameter is introduced to simultaneously describe the relationship between the instantaneous energy gap and the scanning rate of the parameter, which is used for quantitative evaluation of the adiabaticity of the system, and the Landau-Zener non-adiabatic transition model is combined to design and optimize the scanning curve of the lattice compression. The scheme can effectively reduce the probability of non-adiabatic excitation in the compression process, and significantly shorten the lattice compression time under the premise of ensuring the adiabatic evolution of the system.

The application relates to a method for improving the frequency measurement precision of an optical lattice clock in a microgravity environment, which comprises the following steps: two beams of lattice light are divided from one lattice light laser, each beam of lattice light is further divided into two beams of lattice light, and four beams of lattice light form two one-dimensional horizontal optical lattices; wherein the waist positions of the two one-dimensional horizontal optical lattices have a certain interval in the vertical direction, and the midpoint position is the position of the magnetic field zero point in the magneto-optical trap; the projections of the axial directions of the two horizontal optical lattices in the vertical plane are parallel to each other, and the projections in the horizontal plane are perpendicular to each other; an acousto-optic modulator with the same parameters is loaded on the light path of each beam of lattice light, and is used for linear frequency shift and modulation of the lattice light frequency; two clock laser beams are divided from one clock laser source, and are used for exciting different atomic groups in the two one-dimensional horizontal optical lattices. By synchronously detecting the clock transition spectral lines of each different atomic group, the differential comparison of the clock transition frequencies of different atomic groups is realized, so that the common-mode noise in the optical clock system is suppressed. The method can realize an optical lattice clock with super-high frequency measurement precision in a microgravity environment.

This invention discloses a synchronous multi-parameter Flokai modulation method and system for optical lattices, relating to the fields of quantum precision measurement and quantum control technology. The method includes: frequency modulation of lattice light using an acousto-optic modulator, causing its frequency to change with time according to a preset periodic function, generating a frequency-modulated laser which is then input into a polarization modulation module. A time-varying phase delay is introduced through an electro-optic modulator, and the phase delay is converted into a periodic rotation of the linear polarization direction through polarization modulation, resulting in a synchronously multi-parameter modulated lattice laser that always maintains linear polarization. Frequency modulation and polarization modulation are uniformly generated and synchronously driven by a synchronization control module, and they have a stable and adjustable relative phase relationship. By using the synchronously multi-parameter modulated lattice laser to form a standing wave light field, synchronous multi-parameter Flokai modulation of optical lattices is achieved, enabling high-frequency dynamic modulation of the polarization direction while maintaining linear polarization, co-controlling frequency and polarization, and making it suitable for precision measurements using optical lattice clocks.

An apparatus for generating vertically separated atom clouds. The apparatus comprises an optical system comprising an arrangement of lenses and optics. The optical system is configured to trap and cool atoms to form a cold atom cloud; select the hyperfine level of the atoms; trap atoms of the cold atom cloud in a standing wave optical lattice; and vertically split the cold atom cloud into a high cold atom cloud and a low cold atom cloud. The splitting comprises splitting the cold atom cloud into two clouds by launching atoms of the cold atom cloud in opposite directions to form a high cold atom cloud and a low cold atom cloud, and catching the low cold atom cloud up to reach the same velocity as the high cold atom cloud.

An atom beam generation device (100) comprises an atomic oven (102) including a reservoir (106) in which a sample (114) is contained, a deceleration unit (104), and coil units (110, 124). The deceleration unit (104) includes a bore (122) through which an atomic beam and a slowing laser beam (128) pass, and decelerates an atomic beam emitted from the atomic oven (102) by means of slowing laser beam and a magnetic field. The coil units (110, 124) supply Joule heat to the atomic oven (102), and generate a magnetic field in the deceleration unit (104).

A system 100 (e.g. for a modulatable optical trap) including a retro-reflector 110 and an optical modulation unit 120 is described. A first laser beam 140 is optically coupled with a chamber 130 including particles 132. The optical modulation unit is between the retro-reflector and the chamber. The optical modulation unit is configured to provide in the chamber an optical dipole trap for a first set of operating conditions and an optical lattice for a second set of operating conditions. The optical dipole trap is formed by the first laser beam in an absence of a retroreflected laser beam from the retro-reflector. The optical lattice is formed from the first laser beam and a modulated retroreflected laser beam from the optical modulation unit. The optical modulation unit is thus configured to be capable of modulating intensity and phase. Also described is a system with acousto-optical modulators (AOM).

According to the present invention, atoms are trapped by means of a quadrupole magnetic field formed by ring-shaped magnets (106), (108) and three sets of laser beam pairs. A portion of the laser beam pairs LZ is partially blocked by the ring-shaped magnets (106), (108), so that a region (114) which is a non-atom trap space is formed inside a intersecting region (112) where the three groups of laser beam pairs cross. The inside of the intersecting region (112) is irradiated with a laser beam (118) so that atoms within the non-atom catch space are extracted from intersecting region (112).