11 results about "Optical clock" patented technology

The present invention discloses a highly charged Nickel ion optical clock and its implementation method. It uses Ni12+ ions as the clock's reference system, which provides superior anti-interference capabilities and measurement precision compared to conventional low-charge-state ion optical clocks. The Ni12+ ions possess two transition spectral lines at 498 nm and 511 nm that can serve as clock transitions. Utilizing both 498 nm and 511 nm lasers enables a single ion reference system to output two clock signals, allowing for mutual verification. Frequency calibration using these two laser frequencies facilitates the timely detection of operational issues through abrupt changes in their frequency ratio. This approach avoids the problem inherent in a single optical frequency clock, where losing synchronization with the time reference can result in immediately undetectable, erroneous clock signal outputs, thereby significantly enhancing the overall stability of the optical clock.

Optoelectronic device with at least two optoelectronic circuits (2, 4a, 4b) for transmitting an optical clock signal to an electronic component (40-47, 74a, 74b), a control device (78a, 78b) for controlling the propagation times of the optoelectronic circuits and at least two electronic components (40-47, 74a, 74b), each of the at least two optoelectronic circuits (2, 4a, 4b) with: - a clock generation device (25) for generating the optical clock signal, - a converter element (30-37, 73a, 73b) for converting the optical clock signal into an electrical clock signal supplied to the electronic component (40-47, 74a, 74b), and - an optical line (60, 72a, 72b) from the clock generation device (25) to the converter element (30-37, 73a, 73b), wherein the optoelectronic circuit (2, 4a, 4b) has an adjustable optical element (60, 72a, 72b) for setting a propagation delay between the clock generating device (25) and the electronic component (40-47, 74a, 74b), where the optical line (60, 72a, 72b) is the adjustable optical element (60, 72a, 72b), wherein the transit time is adjustable by changing an optical length of the optical line (60, 72a, 72b), wherein the optical line (60, 72a, 72b) has a plurality of heating elements (61, 79a, 79b) for heating the optical line (60, 72a, 72b), wherein the optical length of the optical line (60, 72a, 72b) is adjustable for setting the transit time by heating the optical line (60, 72a, 72b), and wherein the control device (78a, 78b) is configured to individually control the individual heating elements (61, 79a, 79b) to generate a temperature gradient in order to compensate for a temperature gradient (62) within the optoelectronic device by means of this temperature gradient generated as a counter-gradient.

This invention provides a thorium-doped fluoride crystal, its preparation method, and a solid-state nuclear optical clock using the thorium-doped fluoride. The thorium-doped fluoride crystal uses SrF2, LiF, BaF2, and LiF+BaF2 as matrix materials, respectively, and ThF4 as a dopant material. Single crystals of Th:SrF2, Th:LiF, Th:BaF2, and Th:BaLiF3 are obtained through a melt growth process according to a pre-set molar percentage of the raw materials. The thorium-doped fluoride crystal of this invention has a low melting point and simple composition, which is beneficial for achieving high-quality crystal growth. It has an extremely wide band gap, high transmittance in the vacuum ultraviolet band, and a high Th doping concentration, which helps reduce absorption loss and background luminescence in the nuclear transition emission band, and is beneficial for the excitation and detection of nuclear transition signals. It can be used as a preferred material for applications based on… 229 A solid-state nuclear optical clock based on the transition of the Th atom nucleus.

The application provides an earth gravity field inversion method in an inter-satellite tracking mode based on an optical clock, comprising: using a numerical simulation method, the accuracy of the inversion of the earth gravity field in the inter-satellite tracking mode of the satellite-borne optical clock satellite is systematically evaluated. The simulator generates simulated observation data as input in the orbit of the gravity satellite (such as the GOCE and GRACE orbits), and estimates the gravity field coefficients by using a strict least square method. The accuracy of the results is evaluated by comparing the coefficient difference between the inversion model and the reference model. The application evaluates the accuracy of the inversion of the earth gravity field in the inter-satellite tracking mode based on the optical clock through the numerical simulation method, and verifies the potential of the optical clock in the high-precision gravity field measurement. In the future research, the optical clock noise model and the multi-sensor fusion method will be further optimized to improve the inversion accuracy of the high-order gravity field, and more accurate data support will be provided for the earth science and global climate change research.

This invention discloses a stabilized optical clock system and its implementation method based on a dual-microcavity optical comb and two-photon transitions. The system includes a microcavity optical comb section, a locking section, and a photodetector. The microcavity optical comb section contains two SiO2 microchip ring cavity optical comb oscillators, with center wavelengths matched to the two-photon transition lines of rubidium and cesium atoms, respectively. The locking section provides an atomic reference frequency through a two-photon transition generator, and combines a six-way phase-locked loop, an acousto-optic modulator, and a phase modulator to achieve initial frequency locking of the optical comb, interlocking of the repetition frequency, and suppression of thermally induced detuning. The photodetector converts the stabilized optical comb repetition frequency into an RF frequency standard output. This invention solves the problems of complex system design, large integrated size, cumbersome locking structure, and wavelength mismatch in existing ultra-high frequency stabilized atomic clock technologies.

The present application relates to the technical field of optical atomic clock, and discloses a kind of for strontium atom optical clock Multi-mode magnetic field generation and regulation device and method, including three-dimensional magnetic field coil, magnetic field control system and magneto-optical trap;Three-dimensional magnetic field coil includes X direction magnetic field coil, Y direction magnetic field coil and Z direction magnetic field coil;X direction magnetic field coil, Y direction magnetic field coil and Z direction magnetic field coil mutually orthogonal and respectively along opposite position arrangement form cubic skeleton, and magneto-optical trap is located in cubic skeleton;Magnetic field control system is respectively with X direction magnetic field coil, Y direction magnetic field coil and Z direction magnetic field coil electric connection setting.The present application solves the technical problem that the existing strontium atom optical clock system structure is complex, power consumption and thermal load is higher, and not fully utilize the time sequence characteristics of magnetic field use in the process of optical clock operation.

This invention provides a time-resolved ferromagnetic resonance measurement system, comprising a laser (for simultaneously outputting pulsed laser light and a synchrotron microwave synchronized with the pulsed laser), an optical path system, a sample module, a magnetic field module, a microwave modulation module, a photodetector, a signal extraction module, and a control unit. A delay module is configured to achieve controllable adjustment of the relative phase between the synchrotron microwave and the femtosecond probe light. The microwave modulation module modulates the synchrotron microwave and applies it to the sample. The photodetector converts the transmitted light signal into an electrical signal. The signal extraction module extracts the signal intensity and the relative phase between the modulated microwave and the pulsed laser. The control unit inverts the ferromagnetic resonance measurement parameters based on the above information. By sharing an optical clock with the same laser and combining delayed phase scanning, this system can reconstruct the time-domain magnetic moment response on the picosecond to nanosecond scale, directly obtaining the amplitude and phase of the magnetic moment in the transmission direction.

This invention belongs to the field of laser technology and discloses a method and system for controlling the working cavity length of an ultra-stable laser system capable of achieving a magic cavity length. The method involves: acquiring the output signal generated by the laser based on the fundamental mode resonance frequency; acquiring the output signal emitted through the working cavity after stimulated emission of the atomic gain medium; performing beat frequency detection on the two output signals to obtain a beat frequency signal; determining the magic cavity length region of the working cavity based on the relationship between the beat frequency signal and the change in the working cavity length; and adjusting the cavity length of the working cavity according to the aforementioned magic cavity length region. The system includes an ultra-stable frequency reference unit for generating a signal based on the fundamental mode resonance frequency; a magic cavity length confirmation unit for determining the magic cavity length region and generating a piezoelectric ceramic adjustment signal; and a working cavity length control unit for adjusting the cavity length of the working cavity. This invention significantly improves the short-term frequency stability and environmental noise immunity of the system, providing a highly promising new path for next-generation optical clocks and precision physical measurements.

The application discloses a kind of based on single laser excitation and cavity enhancement's rubidium two-photon optical clock system and processing method, the device includes: light source, stable light path, laser power stabilization loop, rubidium two-photon transition physical module and fluorescence detection servo control module;Stable light path includes first half-wave plate, isolator and first polarization beam splitter;Foundation light path includes electro-optic modulator, second half-wave plate, second polarization beam splitter, first high reflectivity mirror and first mirror;Frequency reference sub light path includes optical frequency comb, third plano-convex lens, periodically poled lithium niobate crystal, second plano-convex lens and second mirror;Laser power stabilization loop includes piezoelectric ceramic, first photodetector and power stabilization module;Rubidium two-photon transition physical module includes heatable rubidium atom cell, second high reflectivity mirror and magnetic shield cover.The application solves the problems of existing technology, such as complex laser supporting system, large volume and power consumption.

This invention discloses an integrated optical path system for an ion clock based on segmented hollow-core optical fibers, comprising a multi-wavelength laser source, a polarization adjustment unit, a beam combining unit, a first beam combining fiber, a first fiber feedthrough vacuum flange, a vacuum cavity, and within the vacuum cavity, a first hollow-core fiber, a first convex lens, a second convex lens, a second hollow-core fiber, a second fiber feedthrough vacuum flange, a second beam combining fiber, and a laser frequency polarization monitor. The vacuum cavity also includes an atomic furnace, an atomic beam, and an ion trap. The atomic furnace is fixed within the vacuum cavity and generates the atomic beam, which passes through the geometric center formed by the first hollow-core fiber and the first convex lens, as well as the second hollow-core fiber and the second convex lens. The ion trap generates stable DC and radio frequency potential fields, capturing and manipulating cooled, ionized, and re-pumped ions at the geometric center. This invention offers advantages such as simplified operation, improved efficiency, anti-interference and vibration resistance, good fluorescence detection performance, and portability.