295 results about "Optical cavity" patented technology

The invention discloses a mixed gas absorption spectrum analysis method and system based on variational mode decomposition, specific laser is injected into an optical resonant cavity unit, and a detector unit continuously monitors the light intensity change and records a light intensity attenuation signal; pre-processing the recorded light intensity attenuation signal; carrying out VMD decomposition on the preprocessed ring-down signal to obtain a plurality of IMF components, respectively introducing CO2 and CO gases with known concentrations into the optical resonance unit, and recording spectral data of each single gas component; calculating the similarity and contribution degree of each IMF component, and setting a weight combination to form a joint score; the gas with the highest joint score is selected, the score is compared with an adaptive threshold value, and when the score is higher than the adaptive threshold value, the IMF component is marked as the characteristic component of the corresponding gas; and finally, gathering and outputting the marked IMF components according to gas types to obtain characteristic signals of the gases, thereby realizing multi-component gas separation in the mixed gas absorption spectrum.

The invention provides a method and a system for realizing a weak measurement enhanced chip-level microcavity gyroscope. The method comprises the following steps of: 1, providing a coherent state input by a system by using a single-frequency laser; 2, the output of the single-frequency laser is switched between a first path and a second path through an optical switch, the laser beam is transmitted to the first path in the first half part of the period, and the laser beam is transmitted to the second path in the second half part of the period; 3, the light transmitted along the first path and the second path respectively passes through an optical resonant cavity to sense the rotation angular speed, and a weak value amplification effect is achieved by setting front and back selection states; and step 4, weak measurement enhanced output results transmitted along the first path and the second path are respectively received by a photoelectric detector, and the value of the rotation angular velocity is demodulated according to the obtained output results. According to the invention, the optical microcavity is used as a sensing unit of the gyroscope, the sensing performance of the integrated optical gyroscope is greatly enhanced through a weak measurement technology, and the whole set of system can realize chip-level integration.

An FM LIDAR system is described that includes a frequency modulated LIDAR system that incorporates a laser source that is optically coupled to a whispering gallery mode optical resonator. Light from the laser that is coupled into the whispering gallery mode optical resonator is coupled back out as a returning counterpropagating wave having a frequency characteristic of a whispering gallery mode of the optical resonator. This returning wave is used to reduce the linewidth of the source laser by optical injection. Modulation of the optical properties of the whispering gallery mode optical resonator results in modulation of the frequency of the frequencies supported by whispering gallery modes of the resonator, and provides a method for producing highly linear and reproducible optical chirps that are highly suited for use in a LIDAR system. Methods of using such an FM LIDAR system and vehicle assisting systems that incorporate such FM LIDAR systems are also described.

A light control film includes a plurality of substantially parallel optical cavities. Each of the optical cavities has a height H along a thickness direction of the light control film and a minimum lateral dimension W along an in-plane width direction orthogonal to the thickness direction, where H≥W. The optical cavities are substantially filled with a liquid including a plurality of light absorbing particles configured to move along the thickness direction in response to one or more applied signals or fields such that the movement along the thickness direction causes each of the optical cavities to transition between a substantially opaque state and a substantially transparent state. A full viewing angle of the light control film increases when the optical cavities transition from the substantially opaque state to the substantially transparent state.

The invention discloses a non-linear frequency conversion regenerative amplification device and a method thereof, and belongs to the technical field of laser non-linear frequency conversion. The device comprises a signal light injection unit, a regeneration amplification cavity unit and a pump light synchronization unit. The regenerative amplification cavity unit comprises an optical resonant cavity structure module, a polarization control module and a nonlinear action module. A time domain switch is formed through the polarization control module under the driving of the time schedule controller, and the preset number of times of circulation of signal light in the cavity is accurately controlled. And meanwhile, the pump light synchronization unit generates pump pulse string laser which is synchronous with the circulation process and has sub-pulse power increasing in sequence, so that the signal light and one corresponding pump sub-pulse are subjected to optical parametric amplification in the nonlinear crystal in each circulation. The space complexity of multi-stage amplification is converted into time domain controllability, high-efficiency and high-gain nonlinear frequency conversion is realized by using a single-stage compact structure, and the integration level and the stability of the system are remarkably improved.

The invention provides a single-mode semiconductor laser failure assessment method and device and electronic equipment, and relates to the technical field of semiconductor lasers. The method comprises the following steps: acquiring an optical power current characteristic test curve of the failed single-mode semiconductor laser; determining an optical power parameter change trend of the failed single-mode semiconductor laser according to a preset optical power current characteristic standard curve and the optical power current characteristic test curve of the failed single-mode semiconductor laser; if the optical power parameter variation trend indicates that the optical power parameter in the working current range is zero, determining that the failure type is optical cavity surface catastrophe damage; and if the optical power parameter variation trend indicates that the optical power parameter in the working current range is non-linearly decreased, determining that the failure type is optical body material catastrophe damage, so that the failure type of the single-mode semiconductor laser can be judged through the optical power current characteristic test curve. The evaluation cost can be reduced, the evaluation efficiency is improved, and the accuracy of evaluation results is ensured.

The invention belongs to the technical field of cold atom beam preparation equipment, and discloses a cold atom beam generation device capable of rapidly replacing an atom source, and the device comprises a vacuum optical cavity which is a hollow cavity and is provided with at least one connection port; the atomic source module is arranged in the vacuum optical cavity and is detachably connected with the connecting port of the vacuum optical cavity; and the port function module is detachably and hermetically connected with the connecting port of the vacuum optical cavity. Through modular structures of the differential flange, the electrode flange, the rotating wheel base and the like, when the atom source is used up, a user does not need to depend on an original equipment factory for disassembly like a traditional scheme, but can operate by himself / herself, and only needs to disassemble and replace the atom source module at a port of the electrode flange, so that the maintenance mode that professionals need to intervene is changed, and the maintenance efficiency is improved. And the convenience of equipment maintenance is improved, the downtime of the system is reduced from several days or even several weeks required by a traditional scheme, and the service continuity and the operation efficiency of the equipment are also improved.

Hybrid integrated photonic integrated circuit laser comprising a photonic integrated circuit including an elongated optical waveguide comprising an elongated gain medium waveguide, at least a first and second optical reflector, the gain medium waveguide being located or extending between the first and second optical reflectors and being located inside an optical cavity to provide optical feedback. Further comprising a pump laser diode to provide electromagnetic radiation to the gain medium waveguide. The elongated optical waveguide, and the first and second optical reflectors are monolithically integrated inside the photonic integrated circuit. The gain medium waveguide comprises a rare-earth ion implanted silicon nitride waveguide core. The pump laser diode is positioned adjacent to the at least one photonic integrated circuit and is edge coupled or facet coupled to a lateral edge or a facet of the photonic integrated circuit to provide pump radiation to the rare-earth ion implanted silicon nitride waveguide core.

The invention relates to an optical measuring arrangement (100) for position and / or distance detection of a component relative to a reference along at least one measuring axis, comprising an optical resonator (101) which has at least one coupling mirror (102) for coupling a measuring beam (103) and an end mirror (104) enclosing a resonator cavity (105). The resonator cavity (105) has a length adjustment range, wherein the measuring beam passes through the resonator cavity (105) more than once. The optical resonator (101) has at least one optical element (108) which is configured to control, at least within the length adjustment range (107) of the resonator cavity (105), the beam radius of the measuring beam (103) at the coupling mirror (102) and / or a Gouy phase of the measuring beam (103) propagating in the resonator cavity (105).The invention further relates to a projection exposure system, a lithography system, an inspection system and a coordinate measuring machine.

This utility model relates to the field of optical detection technology and discloses a structure for improving the excitation light collection efficiency in photoluminescence measurement. It includes a base plate, a test stage at the center of the upper surface of the base plate, and a fixed bracket fixedly connected to the center of the rear side wall of the base plate. It also includes a light-emitting structure for fixing the height of the emitting light source, comprising a retainer. Vertical plates are fixedly connected to the lower surfaces of the retainer on both sides. A light-incident tube is located at the center of the upper surface of the retainer, with its lower end penetrating the upper surface of the retainer and extending to the lower end. In this utility model, by setting the light-emitting structure and fixing the measurement height, measurement errors caused by the mechanism are reduced. Light entering at a specific angle will ultimately be transmitted through the light-emitting port of the spherical optical cavity. Thus, regardless of the height of the excitation light position, the intensity of the light entering the spherical optical cavity and the intensity of the transmitted light maintain the same proportional relationship.

The present application relates to laser frequency stabilization technology, in order to solve the contradiction between chip and long-term frequency stability of on-chip frequency stabilization technology, provide a kind of long time laser frequency stabilization system based on on-chip optical reference microcavity, including: two lasers, on-chip optical reference microcavity;Two frequency locking modules are used for locking two lasers to two different modes of on-chip optical reference microcavity respectively;Dual-mode beat frequency measurement and control module is used for real-time measurement of the dual-mode frequency difference between the two different modes locked to on-chip optical reference microcavity;In-cavity temperature slow feedback control loop is used for generating temperature fine control feedback signal based on dual-mode frequency difference, and the fine temperature of on-chip optical reference microcavity is adjusted according to temperature fine control feedback signal, to compensate the optical cavity length change caused by thermo-optic effect and thermal expansion effect, so as to stabilize the resonant frequency of on-chip optical reference microcavity, reduce the long-term drift of on-chip laser light frequency, improve the long time frequency stability of laser single frequency output.

A quantum computer system comprising at least one quantum computer cell system. The quantum computer cell system comprising an optical link module having an optical cavity. A plurality of qubits compr

This invention belongs to the field of reaction chamber technology, specifically relating to an ultraviolet optical cavity reaction chamber module for an air treatment device. The cavity body defines an internal chamber and has an inlet opening and an outlet opening, which are arranged in series with an external airflow passage. One or more internal surfaces of the cavity body are reflective surfaces, the shape of which causes the internal geometry of the cavity body to form an optical cavity. This invention allows light emitted from a region inside the cavity to be repeatedly reflected on an elliptical surface, and to be reflected multiple times within the cavity before reaching the inlet or outlet opening. Simultaneously, the geometric discontinuities at the internal seams minimize the impact on overall optical performance. This invention reduces direct exposure to ultraviolet radiation from the outside of the module and converts intercepted photons into an additional air purification mechanism. Furthermore, the photocatalytic layer does not significantly reduce the reflectivity of the main optical cavity walls.

The invention discloses a cavity parameter optimization method for a bicrystal regeneration amplification structure. The bicrystal regeneration amplification structure to be optimized comprises an optical resonant cavity, two gain crystals arranged in the optical resonant cavity, a pumping source, a pumping light path system matched with the gain crystals, an optical switch arranged in the optical resonant cavity and a reflector used for forming the resonant cavity, the method comprises the following steps: determining the relative position and spacing of two gain crystals in an optical resonant cavity; calculating and designing the physical cavity length of the optical resonant cavity according to the electro-optical switch response time of the optical switch; the curvature radius of the reflector is calculated and selected according to the thermal lens effect possibly generated by the gain crystals under high-power pumping, and the pumping power distribution of the pumping light path system to the two gain crystals is optimized according to the output power of the pumping source and the thermal performance of the two gain crystals. And pumping energy and heat load generated by the pumping energy are dispersed on the two gain crystals.

The invention relates to the technical field of semiconductor lasers, in particular to a broadband wavelength fast scanning laser which comprises a base, a laser gain chip and a sleeve are installed on the base, and the sleeve surrounds the laser gain chip and extends along the light emitting side of the laser gain chip; a movable reflecting mirror is movably arranged in the sleeve, and the movable reflecting mirror and the laser gain chip are oppositely arranged to form an optical resonant cavity; a conductor piece is arranged on the movable reflecting mirror, and a driving coil is arranged outside the sleeve in a surrounding manner; when variable current is introduced into the driving coil, a variable magnetic field is generated in the sleeve, and the variable magnetic field enables electromagnetic force to be generated on the conductor piece so as to drive the movable reflector to move relative to the laser gain chip, so that the cavity length of the optical resonant cavity is changed. The technical problem that an existing tunable MEMS-VCSEL cannot give consideration to the broadband tuning range and the high scanning speed at the same time is solved.

The utility model relates to an infrared gas sensor. The infrared gas sensor comprises a shell, a fixing plate and a mounting plate, wherein a first plane, a first reflecting surface, a second reflecting surface and a first arc surface are arranged in the shell. And an infrared light source and an infrared detector are arranged on the mounting plate. The fixing plate is provided with a first through hole and a second through hole. An arc-shaped plate is arranged in the optical cavity in the shell, the arc-shaped plate is provided with a second arc surface, an optical gas cavity is formed between the first arc surface and the second arc surface, and a vent hole communicated with the optical gas cavity is formed in the shell. Light of the infrared light source can be reflected to the first arc surface through the first reflecting surface, reflected to the second arc surface through the first arc surface, reflected to the first arc surface through the second arc surface, reflected to the second reflecting surface through the first arc surface, and reflected to the infrared detector through the second reflecting surface. Compared with the prior art, the optical path is increased, the detection precision of the sensor is improved, the volume of the air chamber is reduced, and the response time is shortened.

An interferometric resonator optical gyroscope includes an optical frequency comb generator configured to generate an optical frequency comb. Optical signals representative of the optical frequency comb pass through an optical resonator in different directions, and a rotation rate is determined based on the extent of interference between the optical signals. Parameters of the optical frequency comb generator can be controlled by a control servo based on an intensity of the optical signals after propagating in the optical resonator. Utilizing an optical frequency comb generator reduces the bias error during gyroscope operation.

This invention relates to the field of electrovariable emissivity structure technology, and particularly to an electrovariable emissivity structure. An embodiment of this invention provides an electrovariable emissivity structure comprising, along its thickness, a reflective layer, an insulating layer, and a regulating layer. The reflective layer reflects infrared light and is made of materials including conductors and semiconductors. The regulating layer is made of materials including conductors or semiconductors with infrared semi-transparent properties. The reflective layer and the regulating layer are respectively connected to two electrodes of a power supply, and the electrode voltages are adjustable. An optical resonant cavity structure is formed between the regulating layer and the reflective layer. The optical resonant cavity is used to regulate the absorption of infrared light. By adjusting the voltage of the power supply, the infrared transmittance and absorptivity of the regulating layer are changed, thereby adjusting the amount of infrared light entering the optical resonant cavity structure, and thus regulating the infrared emissivity of the electrovariable emissivity structure. This embodiment of the invention provides an electrovariable emissivity structure capable of providing an adjustable emissivity structure for the infrared band.

Pixels in an organic light-emitting diode (OLED) display may have optical cavities defined by a partially transparent cathode layer and a reflective anode structure. Light at a wavelength emitted by a pixel may form a standing wave between the anode and the cathode. The standing wave may have an upper antinode and a lower antinode. Pixels of different colors may have emissive layers aligned with different antinodes. The OLED layers for the pixels may include an electron transport layer that is doped with a low work function material. The cathode may include one or more layers of transparent conductive oxide and / or metal. The cathode may be shorted to a metal mesh and / or a conductive cutting structure to decrease resistance.

A lighting device including predetermined harmonious lighting zones with independence utilizing a single cavity. The lighting device provides predetermined selectively independent lighting zones that can have harmonious appearance when turned all on but maintain crisp zone definition when turned on independently. These lighting zones are generated by a single optical cavity. Hexagonal or other predetermined shaped one-piece or multi-piece lens includes inside plating to provide inner and outer light separation. There is provided isolation of light guides by use of plating in a one piece design or multipiece design.

The invention relates to the technical field of display, and provides an LED packaging device and a backlight module. The LED packaging device comprises: a substrate; the red light generation component comprises a first blue light LED chip and a red wavelength conversion material used for converting blue light emitted by the first blue light LED chip into red light, and is arranged in the first optical cavity on the substrate; the red wavelength conversion material is a mixture formed by mixing nitride-based red fluorescent powder and fluoride-based red fluorescent powder according to a set proportion, and the emission peak wavelength of the nitride-based red fluorescent powder is 600-670 nm; and the blue light generation component and the green light generation component are respectively used for generating blue light and green light and are arranged in other optical cavities except the first optical cavity on the substrate.

A laser component according to one embodiment of the present invention is provided with: a first optical output unit that outputs first pulsed laser light, and has a first optical resonator and a first laser medium which is disposed in the first optical resonator and to which excitation light is inputted in the optical axis direction; a second optical output unit that outputs second light different from the first pulsed laser light, and has a second laser medium to which the excitation light is inputted; and a laser medium that has a first medium region disposed in the first optical resonator and a second medium region disposed in the second optical output unit. The first laser medium and the second laser medium are a common laser medium, the wavelength regions of the first pulsed laser light and the second light are the same, and the second optical output unit is adjacent to the first optical output unit when viewed in the optical axis direction of the first optical output unit.

The invention relates to the technical field of semiconductor display, and discloses a Micro-LED micro display chip and a manufacturing process thereof. A bonding metal layer is arranged at the top of the lower substrate; a metal reflector is arranged at the top of the bonding metal layer; a distributed Bragg reflector is arranged at the top of the metal reflector; a first indium tin oxide layer is laid on the top of the distributed Bragg reflector; an LED epitaxial assembly is arranged at the top of the first indium tin oxide layer; and a second indium tin oxide layer is laid on the other side of the LED epitaxial assembly. The middle parts of the metal reflector, the distributed Bragg reflector, the first indium tin oxide layer and the LED epitaxial assembly are respectively provided with an optical resonance region and an MESA region. By arranging the composite reflection structure and the LED epitaxial assembly to form an optical resonant cavity, light emission in the vertical direction is enhanced, and the light output power of the chip is remarkably improved; meanwhile, the passivation layer on the side wall effectively inhibits the surface leakage current.

The application discloses an acceleration measurement method and device based on optical suspended microparticle centroid motion quantum state, which utilizes optical tweezers to trap a four-level atom and a nanometer microparticle in an optical cavity simultaneously, the optical cavity is driven by driving laser LC, a stable cavity optical field, i.e., cavity mode, is excited and formed in the cavity; the cavity optical field is coupled with the internal energy level transition of the atom and the centroid motion of the nanometer microparticle simultaneously, and three control lasers LES, LER and LGR are used to drive three energy level transition processes of the atom; by controlling the three control lasers LES, LER and LGR, a rapid adiabatic process and an atomic state inversion process are realized; wherein, in the process of preparing the centroid motion of the nanometer microparticle to a target Fock state, the forward rapid adiabatic process and the atomic state inversion process are iteratively executed in sequence; in the acceleration measurement process, the reverse rapid adiabatic process, the atomic state inversion process and the population transfer process based on a pi pulse are comprehensively utilized. The application can further improve the measurement sensitivity.

A quantum memory device for storing a signal field is provided. The quantum memory device comprises an optical cavity comprising a first reflective surface and a second reflective surface; a first optical element and a second optical element arranged within the optical cavity; an atomic system situated between the first optical element and the second optical element, the atomic system configured to store the signal field via an atomic transition; and one or more magnets configured to apply an axial magnetic field across the atomic system.

The present application belongs to the technical field of wavefront distortion measurement, and particularly relates to a wavefront distortion measurement system and method caused by light field waist spot mismatch in a cavity enhancement system. In order to accurately capture the wavefront distortion signal caused by light field waist spot mismatch, an electro-optic modulator (EOM), a convex lens, a three-mirror ring cavity, a plane mirror, a multi-quadrant detector (MPD) and a frequency mixer are sequentially arranged on the outgoing light path of the laser. Through light field modulation, resonance amplification, phase-locked demodulation and quantitative calculation, an error signal reflecting the distortion degree of two types is extracted, the minimum measurable waist spot size and position change are derived, accurate feedback is provided for long-term stable locking of the optical cavity, additional distortion interference caused by the thermal effect of the laser is compensated, and the measurement accuracy and stability of the system are improved.

Disclosed is an optical feedback cavity ring-down spectroscopy system without phase control. The system comprises: a light source module, used for generating a laser of a predetermined wavelength; an optical feedback module, used for feeding back a part of the laser generated by the light source module into the light source module, and generating strong feedback or moderate feedback, so as to narrow the line width of the laser; an optical cavity module, used for increasing the effective action distance between the laser and a target detection substance, and exciting an optical cavity ring-down signal by means of achieving resonance between the laser and an optical cavity; a trigger light-cutting module, used to instantaneously cut off incident light of the optical cavity module to facilitate detection; a detection module, used to detect a transmitted optical signal outputted by the optical cavity module, convert the transmitted optical signal into a voltage signal, to be used as an optical cavity ring-down signal; and a data acquisition module, used to acquire the optical cavity ring-down signal outputted by the detection module, and perform exponential fitting on the optical cavity ring-down signal to obtain a ring-down time.

The invention relates to the technical field of atomic frequency, in particular to a complementary high-stability optical frequency standard system which comprises a seed laser, a first laser beam splitter, a two-photon transition loop, an ultra-stable optical resonant cavity loop and a high-stability clock laser output module. Wherein the two-photon transition loop comprises an acousto-optic modulator, a second laser beam splitter, a first lens, an atomic gas chamber module, a second lens, a reflector, a fluorescence collection and feedback assembly and a first signal generator; the ultra-stable optical resonant cavity loop comprises a first electro-optical modulator, a second electro-optical modulator, a polarization beam splitter, a 1 / 4 wave plate, an ultra-stable optical resonant cavity module, a second signal generator, a photoelectric detector and a demodulation feedback assembly. According to the invention, the characteristic of high short-term frequency stability of the ultra-stable optical resonant cavity and the characteristic of high long-term frequency stability of the two-photon transition optical frequency scale are complemented, so that the short-term and long-term frequency stability can be better than a high-stability index of 10 <-14 >.

This invention relates to a constant pressure control system for an optical cavity based on pump-valve coordination and water immersion sensing, and its active protection method. Belonging to the fields of precision instrument control and industrial automation, the system integrates an electronically controlled proportional valve and an air pump through a pump-valve coordinated pressure control unit. It dynamically adjusts the intake and exhaust flow rates based on an adaptive PID algorithm and a coordinated allocation function, achieving high-precision, rapid, bidirectional adjustment of the optical cavity pressure. Simultaneously, it employs a dual environmental sensing unit including visual perception and capacitive liquid level sensing, which executes constant pressure control and active anti-intrusion monitoring in parallel through an intelligent coordinated control unit. When visual detection identifies a risk of water intrusion, the system proactively limits the pump speed; when the capacitive sensor detects liquid water intrusion, it immediately executes an emergency shutdown. This solves the problem of difficulty in coordinating pressure control and safety assurance in traditional technologies, achieving a unified approach of long-term precise constant pressure and active contamination protection, significantly improving the system's reliability, safety, and intelligence level under complex operating conditions.