1195 results about "Quasi-crystals" patented technology

A positron emission tomography (PET) scanner includes a plurality of gamma radiation detector modules arranged to form a detector ring. Each detector module includes an array of scintillator detectors. Each scintillator detector comprises a monolithic scintillation crystal and a plurality of photodetector arrays, such as silicon photomultipliers (SiPMs). A photodetector array is positioned on at least two nonparallel faces of each scintillation crystal. In some examples, a photodetector array is positioned on each of three orthogonal faces of each scintillation crystal.

The invention belongs to the field of prediction of fatigue failure caused by surface defects under rolling contact loads, and particularly relates to a rolling contact fatigue pitting corrosion prediction method considering crystal plasticity, a corresponding computer readable storage medium and electronic equipment. The method comprises the following steps: S1, constructing a crystal plastic constitutive model of a coupling damage accumulation theory; s2, developing the model in the step 1 into a UMAT subprogram by using Fortran, and embedding ABAQUS into the UMAT subprogram; s3, establishing a representative volume element crystal plastic finite element model; s4, applying a periodic boundary condition and a shear load, obtaining a shear stress-strain curve, carrying out a torsional fatigue test, obtaining fatigue damage parameters of the material, and determining constitutive model parameters of the material; s5, establishing a crystal plastic finite element model of the roller and raceway contact pair; s6, applying boundary conditions in two steps; and S7, observing a damage evolution path to the surface, and obtaining the rolling contact fatigue pitting corrosion life. The method can fill the blank of rolling contact fatigue pitting corrosion prediction methods at present.

The invention relates to the technical field of optical crystal repairing devices, and discloses a milling repairing device for optical crystal surface damage, which comprises a mounting seat, a manual lifting table is mounted on the outer side of the mounting seat, a positioning assembly is arranged on the upper side of the manual lifting table, and an electric sliding table is arranged at the lower end of the upper side of the mounting seat. And a repairing assembly is installed on the lower side of the electric sliding table, the positioning assembly comprises a workbench fixedly arranged at the upper end of the manual lifting table, a model groove is formed in the upper side of the workbench, a positioning groove is formed in the center of the model groove, and a plurality of openings are formed in the positions, close to the outer ring of the model groove, of the inner side of the workbench. According to the milling repair device for the surface damage of the optical crystal, through overall cooperative use, the situation that the concave face and the convex face of the optical lens are directly clamped, and the optical lens is prone to being damaged is avoided, meanwhile, side edge clamping is achieved, and side face repair work is avoided.

The invention provides a solid laser and a temperature control device for a crystal of the solid laser. The temperature control device comprises a first heat sink assembly, a thermoelectric refrigeration part, a second heat sink assembly and a clamping assembly, the first heat sink assembly and the second heat sink assembly are oppositely arranged at an interval; the thermoelectric refrigeration part is clamped between the first heat sink assembly and the second heat sink assembly, the cold end of the thermoelectric refrigeration part faces the first heat sink assembly, and the hot end of the thermoelectric refrigeration part faces the second heat sink assembly; the clamping assembly is arranged on the side, away from the first heat sink assembly, of the second heat sink assembly and used for clamping the solid laser crystal. The thermoelectric refrigeration part is arranged between the first heat sink assembly and the second heat sink assembly, so that the temperature of the laser crystal suitable for working at high temperature can be continuously and stably maintained within a relatively low temperature fluctuation range, the crystal generates heat during working, positive feedback is carried out on the heating sheet by temperature rise, the heat conduction efficiency is higher, the temperature control effect is better, and the service life of the laser crystal is prolonged. And heat is uniformly distributed on the crystal, so that a thermal lens effect is avoided.

The invention provides a method for preparing an alkali-resistant liquid disperse dye by an anti-solvent crystallization method, which comprises the following steps: dissolving an alkali-resistant disperse dye solid in a low-boiling-point solvent, ultrasonically heating to destroy the crystal structure of the dye, and filtering to obtain a dye solution; dissolving a crystal control agent and a dispersing agent in a high-boiling-point solvent to obtain an anti-solvent; slowly adding the dye solution into the anti-solvent, stirring, cooling, and removing the low-boiling-point solvent after dye crystals are stable; the anti-solvent method is applied to preparation of the alkali-resistant liquid disperse dye for the first time, and compared with a traditional grinding method, the method has the advantages of low energy consumption, simple equipment and less pollution; the prepared alkali-resistant liquid disperse dye has the advantages that the particle size can be as low as 130nm, the storage stability is good, the deep dyeing property is improved compared with that of the conventional alkali-resistant liquid disperse dye, the dye utilization rate is high, the dyeing soaping fastness is higher than level 4, the dyeing COD value is reduced compared with that of the conventional dye with the same strength, the use is convenient, and the dyeing process is simplified.

The invention relates to the technical field of force sensors, and discloses a nonlinear decoupling method and system for a three-axis force sensor, and the method comprises the steps: collecting multi-dimensional original data, and carrying out the adaptive noise reduction, dynamic selection of a wavelet basis, and construction of a filtering matrix, and obtaining a noise reduction signal through calculation; constructing a dynamic PINN proxy model, fusing material parameters and environment parameters, outputting a stiffness matrix, establishing an online parameter updating mechanism, calculating the obtained optimization parameters, and constructing an enhanced dynamic compensation matrix; the output stiffness matrix and the enhanced dynamic compensation matrix are fused, and a main singular value is reserved; reconstructing to obtain a reconstructed strain field, establishing a multi-physics field coupling model to compensate quantum-thermal coupling errors, and compensating wire inductive coupling under high frequency; constructing a multi-scale graph structure, strengthening a loss function through physical constraint, performing crystal plasticity hysteresis compensation, fusing multi-scale features, and calculating and outputting a decoupling force value; and an intelligent calibration decision is established, the drift trend is predicted, and the calibration period is dynamically adjusted.

A positron emission tomography (PET) scanner includes a plurality of gamma radiation detector modules arranged to form a detector ring. Each detector module includes an array of scintillator detectors. Each scintillator detector comprises a monolithic scintillation crystal and a plurality of photodetector arrays, such as silicon photomultipliers (SiPMs). A photodetector array is positioned on at least two nonparallel faces of each scintillation crystal. In some examples, a photodetector array is positioned on each of three orthogonal faces of each scintillation crystal.

The invention relates to the technical field of topological photonic crystals, in particular to a topological energy valley photonic crystal, a broadband topological slow light waveguide and a topological beam splitter. The crystal comprises a substrate and a nanorod array arranged on the substrate, the nanopillar array is formed by arranging a plurality of unit cells with honeycomb structures, and the two-dimensional cross section of each unit cell is a regular hexagon; each unit cell is formed by arranging two kinds of nano columns with different section diameters at intervals; two adjacent unit cells share one edge; the two nano columns with different section diameters are respectively a first nano column and a second nano column, and the diameter of the first nano column is twice that of the second nano column; and the value range of the lattice constant a is 480-520 nm. The method has the advantages that the problem of broadband slow light regulation and control in the topological optical waveguide is solved; brillouin region winding of an energy valley boundary state mode is realized, and the group velocity of a light mode is reduced; the light transmission robustness is improved; the back scattering loss caused by manufacturing defects and disorder is reduced; and the applicable frequency range of the device is widened.

The invention provides a patterned photonic crystal laser and a preparation method thereof, the laser comprises a substrate, and a first mask layer, a photonic crystal layer and a second mask layer which are sequentially deposited on the substrate, a light emitting area is etched in the central area of the second mask layer, and transparent conductive layers are deposited on the surface of the second mask layer and the light emitting area; a p-annular electrode is arranged on the surface of the transparent conductive layer on the second mask layer, and an n-annular electrode is arranged below the substrate; the photonic crystal layer is composed of a nanorod array and a polymer filled in gaps of nanorods; holes distributed in a patterned array are etched in the surface of the first mask layer, and nanorods are epitaxially grown in hole areas; the nanorod is formed by sequentially depositing a substrate contact layer, a first waveguide layer, a multi-quantum well layer, a second waveguide layer, a coating layer and a component gradient layer. According to the invention, through collaborative design optimization of all the layers, emission of laser with specific wavelength and preparation of a laser emitting laser with single longitudinal mode, narrow linewidth and stable wavelength are realized.

The invention discloses a magnetic induction intensity detection device based on laser self-mixing interference, which is characterized in that laser emitted by a laser is divided into two light paths after being split by an optical splitter; wherein a polarizing film, a magneto-optical crystal and a transducer are sequentially arranged on one optical path; the transducer is electrically connected with the control module, and the control module generates a continuous sine wave signal to continuously control the transducer; a detector is arranged on the other light path; the detector is electrically connected with the Fourier transform module, and the Fourier transform module analyzes a laser self-mixing interference signal acquired by the detector; the magneto-optical crystal is located in the magnetic field; laser emitted by the laser device is reflected for multiple times between the laser device and the transducer, and laser self-mixing interference is formed under the action of the polaroid. The laser is reflected for multiple times between the laser and the transducer, the Faraday optical rotation effect can be enhanced, the polaroid serves as the polarizer and the polarization analyzer, and the advantages that an external polarization analyzer is not needed, the measurement cost is reduced, and the sensitivity is improved are achieved.

The invention discloses an independent regulation and control method for a photonic crystal double-band high-Q resonance mode and a resonant cavity, and the method comprises the steps: designing an initial resonant cavity which is a photonic crystal structure which is periodically arranged and has high rotational symmetry, respectively calculating quality factors under all modes on two high-symmetry points of a first unit cell of the minimum repeatable unit, and screening out BIC modes with infinite quality factors; optimizing the parameters of the first unit cells, so that the BIC modes of the two high-symmetry points are located at the required frequency; a first disturbance variable quantity is added into a first unit cell, and only the rotational symmetry is reduced, so that the BIC mode of the center point of the Brillouin region is adjusted to be a quasi-radiation mode; and adding a second disturbance variable quantity, and only folding the other high-symmetry point to the center of the Brillouin region so as to adjust the BIC mode of the other high-symmetry point into a quasi-radiation mode. According to the invention, one variable is regulated and controlled to only influence the quality factor of one resonance but not influence the performance of the other resonance.

The invention provides a pneumatic grinding end effector with a spindle vibration isolation function and a control method, the pneumatic grinding end effector comprises a supporting assembly, the supporting assembly comprises an upper bottom plate and a lower bottom plate, a connecting flange is mounted on the upper bottom plate, and the connecting flange is used for being connected with a robot; the propelling assembly is connected with the upper bottom plate and the lower bottom plate, and the propelling assembly is used for adjusting the distance between the upper bottom plate and the lower bottom plate; the grinding assembly comprises a pneumatic motor and a grinding tool, and the pneumatic motor is installed on the lower bottom plate and used for driving the grinding tool; and the vibration isolation assembly comprises a vibration isolation frame and a plurality of photonic crystal unit cells installed on the vibration isolation frame, the vibration isolation frame is connected with an output shaft of the pneumatic motor and the grinding tool, and the multiple photonic crystal unit cells are arranged around the peripheral side of the vibration isolation frame. According to the pneumatic grinding end effector, the influence of vibration of the main shaft on the grinding quality in the grinding process of the end effector is effectively solved.

The invention discloses a lithium battery quasicrystal composite electrode material interface fracture prediction method, and relates to the technical field of quasicrystal treatment, and the method comprises the following steps: S1, constructing an interface surface density function for a quasicrystal composite electrode material; s2, calculating a total potential energy functional of the quasi-crystal composite electrode material according to the interface surface density function; s3, determining a phase field control model based on the total potential energy functional of the quasi-crystal composite electrode material; and S4, performing numerical value implementation processing on the phase field control model to obtain a prediction result. According to the method, a phase field variable is introduced to describe the damage state of a material, a sharp crack is regularized into a diffusion damage area through a crack surface density function, so that the transition from a crack area to a complete area becomes smooth, and the method can be more easily and naturally combined with a multi-physical field coupling effect while predicting a crack propagation path; and the comprehensive influence of phonon-phase ion-heat-electricity-ion concentration-damage-interface coupling field is considered.

The invention relates to the technical field of laser preparation, and provides a photonic crystal surface emitting laser and a preparation method thereof. The preparation method comprises the following steps: sequentially growing an n-type doped layer, a p-type independent limiting layer and a p + / n + tunnel junction on a GaAs substrate; preparing a patterned mask structure on the p + / n + tunnel junction; the patterned mask structure comprises a plurality of preset patterns; etching the p + / n + tunnel junction according to a preset pattern to obtain a plurality of photonic crystals; sequentially growing an n-type coating layer, an undoped active layer and a p-type coating layer on the photonic crystal; growing a p-type electrode on the p-type coating layer; and growing an n-type electrode on the GaAs substrate. According to the preparation method, the SHB problem can be effectively solved, the multiple photonic crystals can be arranged in different modes to form a pattern capable of achieving the needed light emitting mode, light emitting in all directions can be achieved, the requirements for different light emitting characteristics of the photonic crystal surface emitting laser are met, and the use performance of the laser is guaranteed.

Optical device films and methods of forming optical device films having a RMS surface roughness less than about 2.2 μin and a refractive index greater than 2.0 are provided. In one embodiment, an optical device film is provided and includes a crystalline or nano-crystalline material having a refractive index greater than 2.0. A top surface of the optical device film has a root-mean-square (RMS) surface roughness less than about 2.2 microinches (μin).

The invention discloses an all-solid-state debugging-free slab laser based on an orthogonal Porro prism, and belongs to the technical field of solid laser. The diode stack array is used as a pumping source; the pumping shaping system performs homogenization shaping on the slow axis direction of the diode stack array; the coupling cavity mirror introduces the shaped light field into the lath laser crystal, and is used as an oscillation laser reflector at the same time; the ridges of the first Porro prism and the second Porro prism are mutually orthogonal; a light field introduced into the slab laser crystal reaches the first Porro prism through the polaroid, enters the coupling cavity mirror through the polaroid after being reflected, is subjected to repeated reciprocating oscillation on the end face where the coupling cavity mirror is located and the end face where the first reflector and the second reflector which are longitudinally arranged are located to reach the second Porro prism, and then returns to the first Porro prism along the original path; and the light is output by the polaroid. Large single pulse energy can be output based on a single resonant cavity, cascade amplification is not needed, the system size compactness is very high, and the photoelectric conversion efficiency is high.

The invention relates to the technical field of optical communication, in particular to a multi-channel shifting circulator. Comprising an optical fiber unit, a birefringent crystal, a polarization unit, a transmission or reflection unit, a polarizer and a reflection element, the optical fiber unit comprises at least four optical fibers, an optical signal can enter and reach the birefringent crystal along any optical fiber, and the birefringent crystal is used for splitting the optical signal into O light and E light; the transmission or reflection unit comprises a plurality of PBS films, and the number of the PBS films is the same as that of the optical fibers; the polarization unit changes the polarization states of the O light and the E light, so that the O light and the E light pass through the corresponding PBS films; the light enters the polarizer and is reflected back to the polarizer through the reflecting element, and the polarization states of the O light and the E light are changed, so that the O light and the E light are reflected to the adjacent PBS films on the corresponding PBS films; and the polarization unit can change the polarization state of the reflected light, so that the reflected light is emitted along the corresponding optical fiber after being combined by the birefringent crystal. Therefore, the method is suitable for a transmission application scene requiring more than three ports to realize optical signals.

The invention discloses a novel phonon transistor pile, which belongs to the technical field of soil vibration reduction and comprises a pile tip, a pile body and a plurality of ABH-L.R. Combined vibration reduction units. The pile tip is located at the bottom end of the pile body. The ABH-L.R. Combined vibration reduction units are periodically distributed in the pile body from bottom to top along the height of the pile body and connected with the pile body through elastic materials. The ABH-L.R. Combined vibration reduction units are periodically arranged in the pile body, vibration is gathered in the center of the structure through the two-dimensional acoustic black hole plate, energy is dissipated through the energy dissipation characteristic of the constraint damping layer arranged in the center of the two-dimensional acoustic black hole plate and the local resonance effect generated by the L.R. Phononic crystal unit cells, the tubular pile can have the elastic wave band gap characteristic, and the elastic wave band gap vibration reduction effect is achieved. Low-frequency vertical vibration can be effectively filtered, and the influence of the vertical vibration on a building is restrained.

The invention discloses a preparation method of a colored passive radiation cooling coating, the colored passive radiation cooling coating is composed of a thermal radiation base layer and a colloid photonic crystal reflecting layer, monodisperse colloid particles are assembled on the surface of the thermal radiation base layer by means of spray coating, roll coating, brush coating or blade coating, and the colored passive radiation cooling coating is prepared. The preparation method is simple and easy to implement, high in compatibility and capable of achieving large-area construction. The prepared passive radiation cooling coating has high sunlight reflectivity and infrared thermal emissivity, shows excellent passive radiation cooling performance, and can greatly save refrigeration energy consumption. Meanwhile, the coating is stable and adjustable in appearance color, green and environment-friendly, can meet the color requirements of decoration, appreciation and the like, and has high commercial popularization value.

The invention discloses an ultra-wide-band tunable intermediate infrared laser device and a light beam pointing stabilizing method. The device comprises a fundamental frequency pumping source, an ultra-wide tuning annular resonant cavity, a nonlinear frequency conversion crystal, a laser wavelength tuning controller and a light beam pointing stabilizing controller. The fundamental frequency pumping source is used for providing pumping laser for high-peak power pulse emission, the ultra-wide tuning annular resonant cavity adopts a special special-shaped angle design, a high-refractive-index intrinsic substrate is used as an input and output coupling mirror, and the pumping laser enters the high-refractive-index intrinsic substrate at a Bronsted angle and enters the resonant cavity through coupling of the high-refractive-index intrinsic substrate; at least two cavity mirrors in the resonant cavity mirror are gold mirrors highly reflecting near-infrared and middle-infrared bands, the pump light passes through the nonlinear frequency conversion crystal and forms a closed-loop light path in the resonant cavity, efficient optical parametric oscillation is achieved, and middle-infrared laser with an extremely wide wavelength tuning range is generated. And the light beam pointing stabilization controller controls the resonant cavity mirror to compensate light beam pointing deviation, so that continuous wavelength tuning is realized, and the light beam pointing is kept unchanged.

The invention discloses a multilayer film compatible with H, K, medium-wave infrared and long-wave infrared band stealth and radiation heat dissipation. Comprising a substrate, a metal reflection layer, a photonic crystal layer fused with a loss medium and an H and K wave band antireflection layer, the absorption rate of H and K wave bands is larger than 0.5, the emissivity of medium wave infrared and long wave infrared bands is lower than 0.5, and the emissivity of very long wave infrared bands is larger than 0.5; the photonic crystal layer fused with the loss medium is of a multi-layer structure and is formed by alternately stacking dielectric layers made of various high-refractive-index dielectric materials and dielectric layers made of various low-refractive-index dielectric materials. The multilayer film provided by the invention has effective radiation heat dissipation and heat management capabilities while realizing stealth on solar radiation and heat radiation, and can be widely applied to the fields of aviation, aerospace and the like.

The invention discloses an ultra-wideband femtosecond optical parametric oscillator capable of being quickly tuned, and relates to the technical field of optical parametric oscillators. The oscillator comprises a frequency doubling device, an optical parametric oscillator resonant cavity device and a dispersion compensation chirp mirror pair module. According to the invention, the original phase matching bandwidth is further broken through by adopting a non-collinear phase matching mode that the transmission included angle between the pump light and the signal light is 2.5 degrees, and rapid wavelength tuning can be realized only by finely tuning the cavity length under the condition that the angle of the nonlinear crystal is not adjusted; the broadband tunable optical parametric oscillator can break through the bottlenecks in the aspects of wavelength tuning range, wavelength tuning speed and the like of the existing near-infrared optical parametric oscillator, and provides a novel light source with larger wavelength tuning range and higher tuning speed for the fields needing broadband tunable light sources, such as spectroscopy, micro-nano processing, optical frequency combs and the like.

The invention provides a high-stability optical electric field sensor based on a Fabry-Perot structure, and relates to the technical field of electric field sensors, a temperature compensation crystal with a negative thermo-optic coefficient or a negative thermal expansion coefficient is added in a Fabry-Perot resonant cavity to offset the positive thermo-optic effect and the thermal expansion effect of an electro-optical crystal. The device specifically comprises a laser, a polarizer, two groups of reflectors, an electro-optical crystal, a temperature compensation crystal and a photoelectric detector, wherein the laser, the polarizer, the reflecting mirror, the electro-optical crystal, the temperature compensation crystal, the reflecting mirror and the photoelectric detector are sequentially arranged along the direction of a light path, and the two groups of reflecting mirrors form a Fabry-Perot resonant cavity; the polarizer, the two groups of reflectors, the electro-optical crystal and the temperature compensation crystal are packaged into a sensor probe; the sensor probe is connected with the laser and the photoelectric detector through optical fiber jumpers. According to the scheme, the temperature stability of the optical electric field sensor can be improved, and the application scene of the optical electric field sensor is widened.

The invention relates to a thin film electro-optical crystal-silicon nitride heterogeneous integrated N * N high-speed optical switch array and a preparation method thereof. The thin film electro-optical crystal-silicon nitride heterogeneous integrated N * N high-speed optical switch array is formed by connecting 1 * 2 or 2 * 2 Mach-Zehnder high-speed optical switch units according to a certain topological structure. Wherein the high-speed optical switch unit is composed of a silicon nitride passive waveguide and a thin-film electro-optical crystal / silicon nitride heterogeneous integrated phase shift region. Comprising but not limited to thin-film lithium niobate, thin-film lithium tantalate, barium titanate and lead zirconate titanate is integrated above the silicon nitride phase shifting arm through a micro transfer printing method to form a heterogeneous integrated phase shifting region. The large-scale high-speed optical switch array with excellent performance is realized by combining the characteristics of ultra-low loss, CMOS compatibility, thermal stability and the like of a silicon nitride material, the characteristics of low power consumption, low loss, high-speed modulation and the like of a thin film electro-optical crystal and the advantages of high flexibility, parallel integration, low cost, low loss and the like of a micro transfer printing method.

An example system includes a first steering layer interposed between an electromagnetic (EM) source and an emission lens. The first steering layer includes a triplet lens having a Plano-convex lens, a Plano-concave lens, and an electro-optical (EO) crystal positioned between the lenses. The EO crystal includes transparent electrodes on each side, coupled to the respective lenslet and / or the EO crystal. The system includes the EM source providing an incident EM beam on the first steering layer, and the emission lens emitting a steered EM beam to a target location.

The invention provides a system and a method for automatically optimizing the power of a frequency doubling laser, and relates to the technical field of laser. The high-temperature frequency doubling furnace comprises an LBO crystal and a heating sheet, the LBO crystal is used for carrying out high-temperature frequency doubling on laser emitted by the infrared laser, and the heating sheet is used for heating the LBO crystal; the dichroic mirror is used for transmitting the frequency-doubled laser and reflecting and filtering the non-frequency-doubled laser; the spectroscope is used for dividing the frequency-doubled laser into reflected light and transmitted light; the power meter is used for measuring the power of the reflected light; and the temperature controller is used for controlling the heating plate to heat the LBO crystal according to the reflected light power fed back by the power meter so as to adjust the temperature of the LBO crystal and enable the power of the reflected light to fluctuate within a preset range. According to the method, the frequency doubling power of the laser subjected to high-temperature frequency doubling through the LBO crystal can be kept stable and is not influenced by environment temperature fluctuation.

The invention discloses a method and device for measuring a crystal electro-optical coefficient at low voltage, and relates to the technical field of photoelectric coefficient measurement, and the method comprises the steps: employing a wavelength tunable laser as an incident light source of a crystal electro-optical coefficient detection system; before an incident light source is input into a to-be-measured laser crystal, a wave plate is added to serve as a phase compensator to generate phase delay phi 1, and meanwhile the to-be-measured laser crystal generates phase delay phi 2 under the action of direct-current voltage; when the crystal electro-optical coefficient detection system is a half-wave voltage detection system; adjusting the wavelength of the tunable laser so that 3pi / 4 is less than or equal to phi1lt; pi; when the crystal electro-optical coefficient detection system is a full-wave voltage detection system, the wavelength of the tunable laser is adjusted to enable 7pi / 4 to be smaller than or equal to phi1lt; 2pi. As the used light source is the wavelength tunable laser, phi 1 can be adjusted in a large range by changing the wavelength, so that phi 2 and the test voltage are changed, the purpose of measuring the electro-optical coefficient of the crystal at low voltage is achieved, and the test safety is improved.

The invention relates to a measuring head comprising an insulating body (IK), a first and second end fitting (EB1, EB2) with fastening means (BFE) for a line (LTG), and a sensor element (SE). The sensor element (SE) comprises a carrier material (TM), one or more crystals comprising paramagnetic centers (NV1), and a first and second optical waveguide (LWL1, LWL2), which may be identical to one another. The sensor element (SE) is mechanically connected to the first end fitting (EB1), which has fastening means (BFE) for fastening the line (LTG). The second end fitting (EB2) has means for fastening the first and / or second optical waveguide (LWL1, LWL2) to the first and / or second end fitting (EB2), respectively. The first and / or second optical waveguide (LWL1, LWL2) are guided within the insulating body (IK) in an electrically insulated manner from the first (EB1) to the second end fitting (EB2). The first end fitting (EB1).The first optical fiber (LWL1) and / or the second optical fiber (LWL2) are attached to the first end fitting (EB1). The second optical fiber (LWL2) detects fluorescent radiation (FL) from the sensor element (SE), while the first optical fiber (LWL1) transports pump radiation (LB) through the insulating body (IK) to the sensor element (SE) and irradiates the sensor element (SE) with pump radiation (LB). When irradiated with pump radiation (LB), the paramagnetic centers (NV1) of the sensor element (SE) emit fluorescent radiation (FL), which depends on the magnetic flux density B at the location of the sensor element (SE).

A nonlinear crystal flexible clamping and temperature control device comprises a clamping seat, a top face clamping block, a side face clamping block, a stud, a compression spring, a nut, a window mirror pressing ring, a wave spring, a window mirror gasket, a window mirror, a window mirror limiting block, a nonlinear crystal, silicon rubber, a thermistor and a ceramic heating piece. The flexible clamping device exerts pre-tightening force on the nonlinear crystal in the horizontal direction and the vertical direction through the compression spring, and meanwhile flexible clamping of the nonlinear crystal is achieved in a silicone rubber dispensing fixing mode. The temperature control device achieves accurate control over the temperature of the nonlinear crystal in the mode that a thermistor collects temperature signals and a ceramic heating piece heats a clamping base. The flexible clamping and temperature control device disclosed by the invention has the characteristics of performing thermal expansion compensation on the nonlinear crystal, being high in mechanical resistance and temperature control precision, uniform in crystal heat distribution and the like.

The utility model relates to a light-gathering cavity for a large-energy laser and the laser. The light-gathering cavity comprises a cavity assembly, an inner end, a middle end, an outer end, a xenon lamp fixing piece and a glass tube. An accommodating channel for accommodating the xenon lamp and the laser crystal is formed in the cavity assembly; an inner end, a middle end and an outer end are sequentially arranged at the two ends of the cavity assembly in the extending direction of the two ends of the containing channel so as to seal the containing channel; the glass tube is arranged in the containing channel, the two ends of the glass tube are installed at the inner ends, a laser crystal is contained in the glass tube, and a crystal cooling channel is formed between the glass tube and the laser crystal. The outer end is used for hermetically connecting the laser crystal; the inner end head, the middle end head and the outer end head are respectively provided with a through hole for the xenon lamp to penetrate through, and the xenon lamp fixing piece is arranged on the outer side of the outer end head and used for connecting the xenon lamp and the outer end head in a sealed mode. A gap is formed between the through hole and the xenon lamp to form a xenon lamp cooling channel; and the middle end head is provided with an inlet and an outlet which are communicated with the crystal cooling channel and the xenon lamp cooling channel.