106results about "Gaseous masers" patented technology

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 invention relates to a terahertz directional radiation source and an implementation method thereof, the terahertz directional radiation source is formed by arranging four plasma filaments in a pairwise orthogonal mode, and each plasma filament is formed by ionizing air after laser pulses with the same power are focused. The terahertz source is dominated by directional terahertz radiation perpendicular to the plane where the four light filaments are located, the radiation intensity is increased along with the increase of the length of the light filaments, and meanwhile the directional performance of the terahertz radiation is kept all the time. The terahertz radiation generation method solves the problems of large divergence angle, poor directionality, difficulty in splitting in common-beam transmission with laser filaments and the like of common single-filament radiation terahertz waves, and is expected to promote the development of technologies such as terahertz imaging and the like.

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).

To provide an atomic oscillator that can be miniaturized and manufactured on-chip while keeping costs down. [Solution] The atomic oscillator 10 detects the light transmitted through the gas cell 8 and the gas cell 8 containing alkali metal atoms to generate an electrical signal S LI A photodetector 9 converts the signal S to a high-frequency oscillator 31 using an FBAR. LI The input is a feedback signal S. FB A control circuit 1 outputs a feedback signal S FB The control circuit 1 further includes a laser light source 6 that outputs modulated light and introduces it into the gas cell 8, and a control circuit 1 further includes a variable capacitor 32 that adjusts the oscillation frequency of the high-frequency oscillator 31, and a high-frequency adjustment signal S tune The frequency converter 41 outputs the signal S output by the high-frequency oscillator 31. OUT The high-frequency adjustment signal S tune The system includes a frequency mixer 42 that mixes the gas with the gas and outputs a signal at a frequency that synchronizes with the resonant frequency of the gas cell 8.

The present invention provides a gas cell having excellent thermal uniformity.　The gas cell contains alkali metal atoms sealed therein. The gas cell includes a body part having at least one opening and a transparent substrate provided at the opening. A thermal conductivity k of the body part is 30 W･m-1･K-1 or more. A product β･k of the thermal conductivity k and a value β, which is obtained by dividing the surface area of the body part by the surface area of the gas cell, is 20 W･m-1･K-1 or more.

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 that move at a constant velocity along the atom movement path. The probe laser source supplies a probe laser that propagates 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 with the electronic state allowing electric dipole transitions, allowing pulsed excitation of clock transitions by the probe laser that is uniform in time and space.

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 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 attenuation module (130) locally attenuates the gradient of the magnetic field generated by the magnetic field generator (112).

Provided are a gas cell having excellent shape stability, a method for manufacturing the gas cell, and a quantum sensor.　The gas cell has alkali metal atoms sealed therein. The gas cell is provided with a main body having at least one opening and a transparent substrate provided in the opening, the main body being an integrally molded product and having a fitting portion into which the transparent substrate is fitted.

One example includes an atomic optical reference system. The system includes an optical system comprising a laser configured to generate an optical beam. The system also includes a vapor cell comprising alkali metal atoms that are stimulated in response to a modulated beam corresponding to an amplitude-modulated version of the optical beam. The system also includes a detection system configured to monitor at least one detection signal corresponding to light emitted from or absorbed by the vapor cell and to generate at least one feedback signal in response to the at least one detection signal. The system further includes a beam modulator configured to amplitude-modulate the optical beam to generate the modulated beam and to frequency shift the optical beam to generate an output beam having a stable frequency in response to the at least one feedback signal.

A computer-assisted method for the dimensioning of a magnetron cavity for an atomic clock, in particular for a hydrogen maser, the cavity being substantially cylindrical and including at least two curved electrodes disposed along a circular arc and delimiting a substantially cylindrical space of predetermined radius r, the cavity also including a substantially cylindrical storage bulb of radius rB disposed in said space such that there is a radial interstice ei between the at least two electrodes and the storage bulb.

In a general aspect, a photonic crystal maser includes a dielectric body having an array of cavities ordered periodically to define a photonic crystal structure in the dielectric body. The dielectric body also includes a region in the array of cavities defining a defect in the photonic crystal structure. An elongated slot through the region extends from a slot opening in a surface of the dielectric body at least partially through the dielectric body. The elongated slot and the array of cavities define a waveguide of the dielectric body. The dielectric body additionally includes an input coupler aligned with an end of the elongated slot and configured to couple a reference radiofrequency (RF) electromagnetic radiation to the waveguide. The photonic crystal maser also includes a vapor or source of the vapor in the elongated slot and an optical window covering the elongated slot.

One embodiment includes a vapor cell for an atomic physics based sensor system. The vapor cell includes a cell wall formed from a substantially transparent material. The cell wall can encapsulate an alkali metal vapor and can include an inner surface and an outer surface. The vapor cell also includes at least one structural feature disposed on at least one of the inner surface and the outer surface of the cell wall and extending along a portion of a corresponding one of the inner surface and the outer surface.

This magneto-optical trap device comprises: a vacuum container in which atoms to be cooled and captured are enclosed; an optical element which, on the basis of laser supplied from a light source, generates a pair of parallel light beams that travel in mutually opposing directions and are circularly polarized light beams having the same rotational direction of electric field vectors when facing the respective traveling directions; and a diffraction element which has a plurality of dielectric nanostructures arranged in n-fold symmetry (n is an integer of 3 or more) on a plane perpendicular to the traveling directions of the pair of parallel light beams, and emits a diffracted light beam, which is a circularly polarized light beam having a rotational direction opposite to that of the incident parallel light beam, to the side opposite to the incident side at a predetermined diffraction angle for at least one parallel light beam of the pair of parallel light beams, wherein the atoms are cooled and captured in a region in which the pair of parallel light beams and the diffracted light beam overlap inside the vacuum container.

A manufacturing method according to the present invention comprises: attaching a first glass plate (11) to a first surface (10p) of a cell body (10) to form a lid on a gas generation part (20) and a droplet port (16); injecting a raw material solution (34a) of a metal gas through the droplet port (16) in a state where the first glass plate (11) is located below the gas generation part (20) in the vertical direction to introduce the raw material solution (34a) into the gas generation part (20); and vaporizing a solvent contained in the raw material solution (34a) to cause deposition of a solid raw material (34b) of the metal gas in the gas generation part (20).

To solve a problem of difficulty in preventing a light shift from occurring to an atomic oscillator.SOLUTION: An atomic oscillator 100 comprises: a light generator 101 which generates two exciting light beams; an alkali metal atomic gas cell 102 which is irradiated with the two exciting light beams having their frequency difference varied; a detection part 103 which detects the quantity of transmitted light transmitted through the alkali metal atomic gas cell; and a control part 104 which measures the resonance frequency of an alkali metal atomic gas based upon the detected quantity of the transmitted light, and controls the intensity ratio of the two exciting light beams irradiating the alkali metal gas cell based upon the measured resonance frequency.SELECTED DRAWING: Figure 12

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.

Provided is a physical package for an optical lattice clock which has a structure that enables reduction in size or transportation. A physical package (12) is provided with: a Zeeman slower (44) with a partial MOT and a partial MOT device (48) which constitute a MOT device; an optical chamber (46) which constitutes an optical lattice formation portion; and a vacuum chamber (20) which surrounds these components and has a substantially cylindrical shape. The MOT device is arranged along the beam axis of an atomic beam (42) and traps an atom cluster. The optical lattice formation portion uses optical lattice light that enters therein to form an optical lattice in a cavity, confines the atom cluster trapped by the MOT device in the optical lattice, and transfers, along the X-axis which is a movement axis perpendicular to the beam axis, the atom cluster to a clock transition space (52) which facilitates clock transition. The central axis of the cylinder of the main body (22) of the vacuum chamber (20) passes through the clock transition space (52), and is set to be substantially parallel with the beam axis.

To provide an atomic oscillator that achieves both frequency stability and fast startup speed.SOLUTION: An atomic oscillator 10 includes a gas cell 4 containing alkali metal atoms, a photodetector 5 that detects light transmitted through the gas cell 4 and converts it into an electrical signal, a control circuit 6 that has a high-frequency oscillator 62 and receives the electrical signal and outputs a feedback signal, a laser element 1 that outputs light modulated by the feedback signal and introduces it to the gas cell 4, and a startup circuit 8 that controls the laser element 1 to temporarily output light with a wide spectral linewidth during the startup period until the resonant frequency of the gas cell 4 changes from an asynchronous state to a synchronized state with the frequency of the high-frequency oscillator 62.SELECTED DRAWING: Figure 1

The present invention provides a gas cell and a quantum sensor that exhibit excellent bonding performance of a bonding part and high reliability in terms of airtightness.　Provided is a gas cell in which alkali metal atoms are encapsulated. The gas cell comprises: a body part that has at least one opening; a transparent substrate that is provided to the opening; and a bonding part that is provided between the body part and the transparent substrate and that bonds the body part and the transparent substrate. The bonding part is constituted by a melt-fixed layer of glass frit and filler which has a thermal expansion coefficient smaller than that of the glass frit. When the thermal expansion coefficient of the transparent substrate is αa, the thermal expansion coefficient of the bonding part is αb, the thermal expansion coefficient of the body part is αc, and (αb / αa)+(αa / αc) is Q, 2.00≤Q≤3.10 is satisfied.

The application provides a Q-switching device for a waveguide CO2 laser, which can improve Q-switching output peak power, output stable and reliable high-quality light beams for a long time, and is beneficial to miniaturization of the laser. The application is suitable for the waveguide CO2 laser, the stroke of the piezoelectric ceramic can be changed between dozens of microns and dozens of millimeters, and the stroke distance is precisely controlled in a closed loop by a ceramic controller, so that the Q-switching is easily realized, the application has a simple structure, does not need to insert a complex Q-switching element in a resonant cavity, the coupling loss of a waveguide port is greatly reduced, and the Q-switching output peak power is improved. The piezoelectric ceramic has the characteristics of high precision, good stability and long service life, so that the stable and reliable high-quality light beams can be output for a long time, the piezoelectric ceramic has a small volume, the overall structure of the laser is more compact, and the miniaturization of the laser is beneficial.

To reduce the cost and size of magneto-optical trap-type atomic oscillators.SOLUTION: An atomic oscillator of the present disclosure comprises a first laser device 20 that irradiates a glass cell 1 containing alkali metal atoms with a first laser beam from a plurality of directions, and a second laser device 30 for irradiating a second laser beam, and the first laser beam La and the second laser beam L2 are configured to be incident into the glass cell 1 along the same optical path.SELECTED DRAWING: Figure 1

The problem of the present invention is to provide a substrate with high versatility, a method for producing the substrate, and a method for producing a unit cell using the substrate. The problem is solved by providing a substrate comprising a plurality of alkali metal azide spots on a substantially flat surface.

The present invention addresses the problem of providing a highly versatile substrate, a production method for the substrate, and a production method for a unit cell using the substrate. This problem is solved by providing a substrate characterized in that a plurality of alkali metal azide spots are formed on a substantially flat surface.

One example includes an atomic optical reference system. The system includes an optical system comprising a laser configured to generate an optical beam. The system also includes a vapor cell comprising alkali metal atoms that are stimulated in response to a modulated beam corresponding to an amplitude-modulated version of the optical beam. The system also includes a detection system configured to monitor at least one detection signal corresponding to light emitted from or absorbed by the vapor cell and to generate at least one feedback signal in response to the at least one detection signal. The system further includes a beam modulator configured to amplitude-modulate the optical beam to generate the modulated beam and to frequency shift the optical beam to generate an output beam having a stable frequency in response to the at least one feedback signal.

A physical package of an optical lattice clock having a structure that can be miniaturized or portable is realized. The physical package (12) comprises: a Zeeman reducer (44) with a partial MOT and a partial MOT device (48), both of which constitute an MOT device; an optical chamber (46), which constitutes an optical lattice forming section; and a vacuum chamber (20) of a substantially cylindrical shape, which surrounds them. The MOT device is arranged along the beam axis of an atomic beam (42) to capture atomic groups. The optical lattice forming section uses incident optical lattice light to form an optical lattice in a cavity, encloses the atomic groups captured by the MOT device in the optical lattice, and moves the atomic groups along the X-axis, which is a moving axis perpendicular to the beam axis, to a clock transition space (52) that promotes clock transition. The central axis of the cylinder of the main body (22) of the vacuum chamber (20) is set to pass through the clock transition space (52) and be substantially parallel to the beam axis.

In this magneto-optical trap device, five laser beams are irradiated in a trap space in which atoms are trapped. Of the five laser beams, three laser beams (laser beams a1, a2, a3) pass through the inside of the same plane (Z plane) and are irradiated in the trap space. The two laser beams that intersect that plane (laser beams a4, a5) are irradiated in the trap space. The laser beam a1 is used together as a slowing laser beam b for Zeeman slower.

One example includes an atomic optical reference system. The system includes an optical system with a laser configured to generate a light beam. The system includes a vapor cell including alkali metal atoms stimulated in response to a modulated beam corresponding to an amplitude modulated version of the light beam. The system includes a detection system configured to monitor at least one detection signal corresponding to light emitted from or absorbed by the vapor cell and generate at least one feedback signal in response to the at least one detection signal. The system further includes a beam modulator configured to amplitude modulate the light beam to generate the modulated beam and frequency shift the light beam in response to the at least one feedback signal to generate an output beam having a stable frequency.

The atoms are captured by a quadrupole magnetic field formed by magnets (106), (108) and three sets of laser pairs. A region (114), which is a non-atom trapping space, is formed in an intersection region (112) where the three laser pairs intersect by shielding a part of the laser pairs (LZ) with magnets (106, 108). By irradiating laser light (118) into the intersection region (112), atoms in the non-atom trapping space move to the outside of the intersection region (112).