155 results about "Laser pumping" patented technology

A LSP broadband light source is disclosed. The light source may include a gas containment structure. The light source may include multiple jet nozzles, wherein the jet nozzles are configured to generate supersonic gas jets and direct the supersonic gas jets to collide within the gas containment structure to form a localized high-pressure region at the collision point. The light source may include a primary laser pump source, wherein the primary laser pump source is configured to direct a primary pump beam to a localized high-pressure region formed at the collision point. The light source may include a pulsed-assisting laser source, wherein the pulsed-assisting laser source is configured to direct a pulsed-assisting beam to the localized high-pressure region at the collision point. The light source may include a light collector element configured to collect broadband light emitted from the plasma.

A portable air-cooled fiber laser device disclosed by the present invention comprises a box body, a laser pumping source, a fiber output assembly, a power supply assembly, a heat dissipation engine and a control circuit are integrated in the box body, the power supply assembly adopts a drawable structure, a replaceable battery is arranged in the power supply assembly, and energy supply without an external power supply is realized. The heat dissipation engine is arranged in a sandwich type structure and is composed of a heat dissipation fin set and heat pipes embedded in the heat dissipation fin set, a transverse ventilation heat dissipation channel is formed through a heat dissipation fan, and efficient heat management is achieved. Connection with a mobile terminal or computer equipment in a wired or wireless mode is supported, and remote control over the operation state of the laser is achieved. The device is compact in structure, efficient in heat dissipation and convenient to carry, has good heat dissipation performance, independent power supply capacity and environmental adaptability, is suitable for application scenes such as multi-scene field operation and emergency use, and has good practicability and popularization value.

A compact LSP broadband light includes a gas containment structure containing a mixture of a first noble gas and a second noble gas, a filter tube positioned within the gas containment structure, an input window, and a pump source. The laser pump source directs an optical pump through the input window to sustain a plasma within the filter tube. The first noble gas absorbs broadband light within a first and a second wavelength band. The filter tube absorbs broadband light having a wavelength below a selected threshold. The absorption of broadband light by the first noble gas and the filter tube provide long-pass filtering to protect one or more downstream optical elements. The gas containment structure includes an output optical window for transmission of filtered broadband light. The gas containment structure includes a gas inlet and outlet for generating a reverse vortex flow pattern within the filter tube.

The invention discloses an ultrafast terahertz response magnetic field measurement method and system based on a linear magneto-optical conversion material, and the method comprises the steps: preparing a linear magneto-optical conversion heterojunction film which comprises at least one signal generation layer with a linear magneto-optical conversion characteristic and at least one signal emission layer with a strong spin-orbit coupling effect; placing the heterojunction thin film at the position of a magnetic field to be measured, and irradiating the heterojunction thin film by using femtosecond laser pumping pulse so as to enable the heterojunction thin film to radiate a terahertz signal; through the terahertz vector detection and rotation detection system, the positive and negative and the magnitude of terahertz signals radiated by the heterojunction film in three groups of orthogonal directions are detected, and the magnetic field direction and the magnitude of the magnetic field position to be detected are calculated based on the three groups of terahertz signals. The sensor has the advantages of being high in sensitivity, high in response speed, non-contact and the like, can achieve rapid detection of various vector magnetic fields such as stable, periodic modulation and sub-picosecond transient pulse, and has hundred-nanometer-scale spatial resolution capacity.

A magnetic field measurement method based on multi-focus array laser pumping atomic spinning comprises the steps that pumping light is subjected to phase modulation through a spatial light modulator to generate a multi-focus circularly polarized light array, light intensity distribution of focuses of the multi-focus circularly polarized light array on a transverse plane is uniform, and the distances between the focuses of the multi-focus circularly polarized light array are consistent; therefore, the problem of non-uniform distribution of the laser in the transverse direction due to Gaussian light intensity is effectively compensated. In the longitudinal direction, according to the law of energy attenuation caused by the action of light and atoms, the focus light intensity is designed to be gradually enhanced along with the z-axis depth in combination with an anti-Lambert-W function, and a focus array is uniformly focused at the center of an alkali metal gas chamber by expanding the focus depth, so that the transverse and longitudinal polarizability uniformity of alkali metal atoms is remarkably improved, the optical frequency shift virtual magnetic field gradient is inhibited, and the stability of the alkali metal gas chamber is improved. And the common-mode rejection ratio, the signal-to-noise ratio and the response sensitivity of the SERF magnetic field measuring device are improved. The focus array is optimized in real time through detection feedback, efficient compensation and regulation are achieved, and the method is suitable for accurate measurement of the sub-fT-level weak magnetic field.

The invention discloses a femtosecond ultrasonic wafer metal film multi-layer measurement system, method and device, and the system comprises a sample platform which is used for flatly placing a wafer sample to be measured; the main light path is used for generating laser and separating the laser into pumping laser and detection laser; the pumping laser path and the detection laser path are respectively used for guiding the pumping laser and the detection laser to be successively projected onto the surface of the wafer sample; the receiving unit is used for processing a reflected light beam returned from the surface of the wafer sample and comprises a pump light beam eliminator to isolate residual reflected light of the pump laser in the reflected light beam; the detection laser detection assembly is used for collecting the reflected detection laser, processing the reflected detection laser and converting an optical signal into an electric signal to obtain reflected signal intensity change data of the reflected detection laser; and the controller is used for acquiring the flight time of the detection laser based on the reflected signal intensity change data so as to acquire the thickness of the wafer metal film. And the pump light beam eliminator reduces pump light leakage and scattering, and the SNR (Signal to Noise Ratio) is improved.

A multi-cavity system for intracavity laser pumping, comprising a first laser cavity. The first laser cavity may comprise a first gain chip, configured to generate a first laser beam, and a first end mirror disposed optically in line with the first gain chip, configured to reflect the first laser beam back to the first gain chip. The first laser cavity may further comprise a second gain chip disposed optically in line with the first gain chip. The first laser beam may be configured to excite the second gain chip. The second gain chip may be configured to generate a second laser beam upon excitation by the first laser beam. The system may further comprise a second laser cavity at least partially intersecting with the first laser cavity. The second laser beam may be configured to be directed through the second laser cavity.

The invention discloses a laser pumping source protection device and an optical fiber laser. The laser pumping source protection device comprises a laser pumping device, a pumping source isolator, a pumping source protector, a high-reflectivity grating group, an optical fiber beam combiner, a seed source, an active optical fiber and a signal optical isolator. Wherein the pumping source isolator, the pumping source protector and the high-reflection grating group are sequentially arranged along a laser propagation path, so that medium-frequency-band reverse light is blocked by the pumping source isolator, low-frequency-band reverse light is inhibited by the pumping source protector, and high-frequency-band reverse light is reflected by the high-reflection grating group. The seed source is used for transmitting signal light, the optical fiber beam combiner is used for coupling the signal light and pump light, the active optical fiber is used for exciting doped ions and amplifying the signal light, and the signal light isolator is used for isolating the signal light in the coupled light. According to the device, the three different optical suppression elements are used for blocking or reflecting the reverse light of different wavebands to form three-level protection, so that the reliability of the laser is improved, and the service life of the laser is prolonged.

The invention belongs to the technical field of nonlinear optical crystals, and particularly relates to a zeolite-like structure nitrogen oxide silicate nonlinear optical crystal and a preparation method and application thereof, the chemical general formula of the crystal is Ba3Si3N5OCl, the crystal belongs to a hexagonal system, the cell parameters of the crystal are as follows: a is 9.5147 (6), c is 5.5002 (4), V is 431.22 (6) 3, Z is 2, the space group is P-62c, and the crystal has a non-centrosymmetric structure. The Ba3Si3N5OCl crystal provided by the invention is used as a novel zeolite-like structure nitrogen oxide silicate, successfully integrates nonlinear optical activity and phase matching capability, can generate frequency doubling response which is about 0.2 times of KDP (potassium dihydrogen phosphate) under 1064 nm laser pumping, and can realize phase matching, so that the Ba3Si3N5OCl crystal becomes a nonlinear optical material with practical device application potential.

This invention discloses a 2.3 μm fiber laser based on 980 nm laser pumping, relating to the field of mid-infrared fiber laser technology. This fiber laser utilizes fluorotellurate glass fiber co-doped with thulium and erbium ions as the gain medium. It absorbs the 980 nm pump light energy by introducing erbium ion doping, and then achieves Tm through the energy transfer process between erbium and thulium ions. 3+ of 3 H4- 3 The population inversion of the H5 energy level ultimately yields laser output in the 2.3 μm band. This invention utilizes a high-power 980 nm laser as the pump source and a thulium-erbium co-doped fluorotellurate glass fiber prepared by the rod-tube method as the gain medium. By writing fiber gratings with appropriate reflectivity at both ends of the fiber, a resonant cavity with a reflection wavelength of 2.3 μm is constructed, enabling the development of a high-power 2.3 μm laser that can operate stably for a long time.

The invention belongs to the technical field of semiconductor laser packaging, and particularly relates to a rapid detection method and detection device for deformation of a pumping source shell of a semiconductor laser, and the method comprises the steps: clamping the pumping source shell through an L-shaped positioning block; identifying the contour of the shell by using a visual mechanism and setting a detection point; the shell is sequentially driven to complete contact type deformation data acquisition of the X-axis frame, the Y-axis frame and the Z-axis internal step; performing comprehensive analysis and qualification judgment on the multi-axis data by the touch control mechanism; and finally displaying a result and alarming when the result is abnormal. According to the invention, full-automatic and multi-dimensional deformation rapid detection is realized, visual guidance is combined with a replaceable positioning block, and the device is suitable for shells of different models. And through three-axis high-precision contact type measurement, data can be quantitatively evaluated to form and position errors such as flatness and step height. According to the invention, data processing and alarming are integrated, the quality and the equipment state are monitored in real time, and the reliability is improved.

The utility model relates to the technical field of laser equipment, in particular to a laser assembly, a solid-state laser and laser processing equipment, and the laser assembly comprises a birefringent crystal which is used for emitting solid-state laser under the pumping effect, and the solid-state laser comprises two pieces of orthogonal polarized light with different wavelengths; the Q switch is arranged at one end of the birefringent crystal and is used for controlling the output of the solid-state laser; and the dual-wavelength output coupler is arranged at one end, deviating from the birefringent crystal, of the Q switch and is used for coupling and outputting two orthogonal polarized lights in the solid-state laser. Through the mode, the energy loss in the laser pumping cavity can be reduced, so that the laser threshold value is reduced, and the laser output power is improved.

The present invention provides a light-generation system (1000) including a first light-generation device (110), a luminescent body (1200), a thermally conductive element (500), and an axicon-like optical element (400), wherein: (A) the first light-generation device (110) is configured to generate first device light (111), the first light-generation device (110) including one or more of a superluminescent diode and a solid-state laser; (B) the luminescent body ( (1200) includes a luminescent material (200) configured to convert at least a portion of the first device light (111) into luminescent material light (201), the luminescent body (1200) having an annular shape; and (C) a thermally conductive element (500) configured (a) to be in thermal contact with at least a portion of the luminescent body (1200), and (b) to convert at least one of the first device light (111) and the luminescent material light (201). (D) the axicon-like optical element (400) comprises a first portion (410) and a second portion (420) and has an optical element length (L), the first portion (410) having a conical shape, a first length (L1) and comprising a first end window (411), the second portion (420) having a cylindrical shape, a second length (L2) and comprising a second end window (422), where 0.7≦L2 / L<1; (E) the axicon-like optical element (400) comprises: (a) a first portion (410) and a second portion (420) and having an optical element length (L), the first portion (410) having a conical shape, a first length (L1) and comprising a first end window (411), the second portion (420) having a cylindrical shape, a second length (L2) and comprising a second end window (422), where 0.7≦L2 / L<1; A light generating system is provided that is configured to (a) receive at least a portion of a first device light (111) via a portion (410) and provide an annular beam of the first device light (111) to a luminescent body (1200) via a second portion (420), and (b) collect at least a portion of a luminescent material light (201) via the second portion (420) and provide a beam of luminescent material light (201) via the first portion (410).

The invention discloses a temperature-driven tunable all-solid-state 1.5-micron cross-polarization dual-wavelength laser, and belongs to the technical field of solid lasers. The laser comprises a laser pumping source, a light beam shaping device and a laser resonant cavity which are sequentially arranged along a light path, a cooling device is mounted outside the laser resonant cavity; the laser resonant cavity comprises a laser crystal arranged on a light path; laser emitted by the laser pumping source passes through the light beam shaping device and then is focused and incident into the laser crystal, and the laser crystal is selected from one of an a-cut Er < 3 + > / Yb < 3 + > double-doped borate crystal, an Er < 3 + > / Yb < 3 + > double-doped vanadate crystal and an Er < 3 + > / Yb < 3 + > double-doped yttrium aluminum garnet crystal. The all-solid-state 1.5-micron cross-polarization dual-wavelength laser with tunable power is realized by utilizing the photo-thermal anisotropy of the a-cut Er < 3 + > / Yb < 3 + > double-doped 1.5-micron laser crystal and adjusting the crystal temperature through the cooling device.

The invention discloses a defect detection method based on light wavefront. The defect detection method comprises the following steps: arranging an object to be detected on a base; providing a laser device which comprises a laser pump and a laser light source and emits a first laser beam towards the detection part of the object to be detected; providing a first light wavefront sensor, wherein the first light wavefront sensor receives first reflected light of the first laser beam reflected by the detection part of the to-be-detected object to generate a first reflected light signal, or receives first penetrating light of the first laser beam penetrating through the detection part of the to-be-detected object to generate a first penetrating light signal; providing a waveform generator which is electrically connected with the first optical wavefront sensor, and receiving the first reflected light signal or the first penetrating light signal by the waveform generator to generate a first detection oscillogram; the invention further provides a defect detection system based on the light wavefront.

The present invention discloses a dual-channel laser amplification device and method, belonging to the field of laser technology. The device comprises: a first seed laser unit and a second seed laser unit for outputting two seed laser beams with different incident angles and refractive indices in a gain medium; a pump module for generating pump light to provide pumping conditions for power amplification of the two seed laser beams; a thermal control module for providing operating temperature control conditions for the entire device; a laser gain medium for receiving two seed laser beams incident at different incident angles through an incident end face, and after undergoing several total reflections with different paths within the gain medium, emitting the two seed laser beams at the same angle through an exit end face; and a third laser beam output unit for combining the two seed laser beams emitted at the same angle to produce a power-amplified output beam. The present invention uses a single laser gain module to achieve power amplification of two laser beams and has a laser beam combining function, effectively improving the integration of the laser amplifier and beam combining system.

The invention belongs to the technical field of optical fiber lasers, and discloses a multi-soliton-state adjustable optical fiber laser based on a time delay polarization multiplexing structure. The fiber laser comprises a laser pumping source, a wavelength division multiplexer, an erbium-doped gain fiber, a polarization independent isolator, a mode locking device based on a carbon nanotube saturable absorber, a polarization beam splitter, a polarization beam combiner and an output coupler which are sequentially connected through a single-mode fiber. A time delay polarization multiplexing structure of the optical fiber laser adopts a combination of a polarization beam splitter, a single-mode optical fiber and a polarization beam combiner, and the lengths of the single-mode optical fibers on two branches are obviously different. Therefore, traditional solitons conforming to independent mode locking of the long and short cavities can be output, and long-cavity or short-cavity-dominated master-slave soliton equally-spaced soliton beams and long-cavity and short-cavity periodic alternately-spaced pulse output can be generated. According to the invention, by introducing a time delay polarization multiplexing structure, the limitation of a traditional annular cavity is broken through, and a new solution is provided for the generation and dynamic regulation of multiple soliton states.

The utility model provides a chromium-doped gain medium solid laser based on thulium solid laser pumping. Comprising a pumping source, a pumping light coupling device, a first laser lens, a thulium-doped laser gain medium, a first laser coupling output lens, a light coupling device, a second laser lens, a chromium-doped laser gain medium and a second laser coupling output lens which are arranged in sequence, the thulium-doped laser gain medium is a thulium-doped solid gain medium; the chromium-doped laser gain medium is a chromium-doped solid gain medium; a first oscillation cavity of laser is constructed between the first laser lens and the first laser coupling output lens; and a second oscillation cavity of the laser is constructed between the second laser lens and the second laser coupling output lens, and is used for wavelength selection to realize the output of the laser at the wave band of 1.9-3 microns. According to the utility model, the thulium-doped solid laser is used as a pumping source for pumping the chromium-doped crystal, so that the problem that the chromium-doped crystal is low in pumping efficiency and output power under other pumping sources such as an optical fiber laser is solved.

The invention belongs to the technical field of semiconductor laser pumping solid lasers, and discloses a semiconductor side pumping solid laser module based on a multi-cavity reflection light-gathering cavity, which comprises a multi-cavity reflection light-gathering cavity (2), an elliptical cavity and a semicircular cavity which are formed in the multi-cavity reflection light-gathering cavity (2), and the inner walls of the elliptical cavity and the semicircular cavity are reflecting surfaces. An LD bar (1) and a thin rod type laser working medium (3) are arranged in the multi-cavity reflection condensation cavity (2), pump light emitted by a luminous point of the LD bar (1) is reflected by the inner wall and then converged at the axis position of the thin rod type laser working medium (3), residual pump light absorbed by the thin rod type laser working medium (3) is reflected back to the thin rod type laser working medium (3) again, and the residual pump light is converged at the axis position of the thin rod type laser working medium (3). And residual pumping light energy is absorbed again, so that high-efficiency pumping is realized. According to the invention, the utilization efficiency of pump light energy is improved, and under the same laser output power, the volume, weight and power consumption indexes of the pumping part of the laser are reduced.

The invention provides a multi-laser-beam 3D printing head for additive manufacturing and a 3D printing device, the multi-laser-beam 3D printing head for additive manufacturing comprises a shell, the shell is provided with a plurality of first parts, the multiple first parts annularly surround the center axis of the shell, a connecting part is arranged between every two adjacent first parts, each first part is provided with a concave area and a non-concave plane, and the concave area and the non-concave plane are arranged in parallel; for each first part, the distance between the concave area of the first part and the central axis is smaller than the distance between the non-concave plane of the first part and the central axis; the plurality of laser pumping sources and the plurality of first parts are arranged in a one-to-one correspondence manner, each laser pumping source is arranged in the corresponding first part, each laser pumping source comprises a plurality of chips and an optical assembly, and the plurality of chips and the optical assemblies of the laser pumping sources are arranged in the concave areas of the corresponding first parts; according to the printing head, the chip and the optical assembly of the laser pumping source can be protected, the overall structure and laser output of the printing head can be more stable, and optical path loss can be effectively reduced.

The invention relates to a spatial displacement laser spectrum detection method for wood identification. The method comprises four steps of instrument initialization, surface layer laser spectrum detection, base layer spatial displacement spectrum detection and comprehensive spectrum analysis of a detection target. The beneficial effects are that the same infrared laser is used as a laser pumping source of the infrared photonic crystal fiber and an infrared laser source for spatial displacement spectrum detection. The infrared absorption spectrum of the target surface layer and the infrared laser Raman and fluorescence spectrum of the base layer in the same wave number section can be detected at the same time, so that the material identification of the surface layer and the base layer is realized at the same time. Meanwhile, the wave number resolution of the infrared spectrum Fourier transform spectrum module is high, so that the high-resolution infrared laser Raman and fluorescence spectrum of the base layer can be obtained, and fine spectrum data is provided for base layer material identification. And the requirement for on-site rapid detection of wood products is met.

The invention provides a deep ultraviolet solid-state laser based on a lithium potassium sulfate crystal. The deep ultraviolet solid-state laser sequentially comprises an ultraviolet laser pumping source, a beam shaping system and a vacuum cavity along a first direction, an incident window sheet, a lithium potassium sulfate (LiKSO4, LPS) deep ultraviolet frequency doubling device, a light splitting prism, a light beam terminator and an emergent window sheet are sequentially arranged in the vacuum cavity along a first direction; wherein ultraviolet laser emitted by the ultraviolet laser pumping source passes through the beam shaping system and then enters the vacuum cavity through the incidence window sheet; in the vacuum cavity, ultraviolet laser is emitted to the lithium potassium sulfate deep ultraviolet frequency doubling device through the incidence window sheet to generate ultraviolet laser and deep ultraviolet frequency doubling laser, the ultraviolet laser and the deep ultraviolet frequency doubling laser are separated after passing through the light splitting prism, the ultraviolet laser is collected by the light beam terminator, and the deep ultraviolet frequency doubling laser is emitted through the emission window sheet.

The invention belongs to the technical field of ultrafast fiber lasers, and discloses a multi-soliton-state fiber laser based on sulfur / graphene oxide under continuous wave excitation. The fiber laser comprises a laser pumping source, a wavelength division multiplexer, an erbium-doped gain fiber, a polarization independent isolator, a polarization controller, an output coupler and a saturable absorber mode locking device based on a sulfur / graphene oxide composite material, which are connected in sequence through a single-mode fiber. The sulfur / graphene oxide composite material mode locking device is a composite saturable absorber film prepared by mixing a sulfur solution and a graphene oxide solution through ultrasonic waves of an ultrasonic machine. A certain noise-like quasi-continuous wave background exists in the ultra-fast fiber laser, rapid switching of soliton states can be achieved by adjusting the polarization controller or the pumping power, and therefore the defect that traditional solitons, bound-state solitons and bound-state pulsation solitons in the ultra-fast fiber laser cannot be rapidly switched back and forth is overcome.

The application provides a repetition frequency tuning system and a frequency stabilization method based on a microcavity soliton optical frequency comb, which comprises: a pump laser generation module, which is suitable for providing continuous pump laser; a pump laser feedback module, which is suitable for monitoring the pump laser in real time, so that after the microcavity soliton optical frequency comb is generated, a first error signal is transmitted to the pump laser generation module to lock the frequency of the pump laser; a whispering gallery mode microcavity, which is suitable for providing a reaction space for generating the microcavity soliton optical frequency comb based on the pump laser generated by the pump laser generation module; an auxiliary laser generation module, which is suitable for providing auxiliary laser for inhibiting the thermal effect in the whispering gallery mode microcavity and transmitting the auxiliary laser to the whispering gallery mode microcavity, so that the generation of the auxiliary microcavity soliton optical frequency comb and the adjustment of the local dispersion in the whispering gallery mode microcavity are realized; and an auxiliary laser feedback module, which is suitable for monitoring the repetition frequency in real time and transmitting a second error signal to the auxiliary laser generation module, so that the tuning and locking of the repetition frequency are realized.

The invention discloses a terahertz time-domain spectral imaging method based on a femtosecond laser pumping-detection principle. The terahertz time-domain spectral imaging method comprises the following steps: acquiring a terahertz wave beam signal of a to-be-detected sample through a terahertz time-domain spectral system; gaussian fitting is carried out on the terahertz wave beam signal by using the terahertz wave beam model; and performing imaging reconstruction on the Gaussian fitting result of the terahertz wave beam signal by adopting a maximum likelihood and maximum expected value strategy to obtain an imaging reconstruction result. According to the terahertz time-domain spectral imaging method based on the femtosecond laser pumping-detection principle, the reconstruction technology combining the Gaussian beam model and the MLEM algorithm is introduced, the wave path calculation error is effectively reduced, the scanning imaging quality is improved, and high-resolution two-dimensional terahertz imaging is achieved; according to the method, the structural characteristics of fiber distribution, agglomeration, interruption and the like in the cigarette can be clearly presented, the defects of image blurring and multiple artifacts of a traditional back projection algorithm are overcome, and an efficient and reliable solution is provided for nondestructive testing and quality evaluation of the internal structure of a cigarette product.

In a laser-pumped plasma light source (100) having a gas-filled chamber (1), the device for plasma ignition is a solid-state laser system (7) which generates two pulsed laser beams (8, 9) focused into the chamber (1): a first beam (8) is generated in free-running mode, a second beam (9) is generated in Q-switched mode. The solid-state laser system (7) comprises a single active element (10), a radiation source (11) for pumping the active element (10) and an optical resonator (12, 13) providing a plurality of passages of the laser beams through the active element (10). One optical resonator (13) is equipped with a Q-switch (14) mounted on the path of the second beam (9) so that the Q-switch overlaps only a part (15b) of the cross section of the laser beam.

The invention discloses a strong pumping bilateral resonance modulation-demodulation magnetic sensitivity enhancement method of a quantum magnetic compass. The method comprises the following steps: constructing a quantum magnetic compass platform comprising a sensing unit and external optical and microelectronic devices; quantum state enhanced reading containing magnetic vector information is realized by using a pumping enhancement mode; a standard diamond is used, the thermal conductivity and the light transmission of the diamond are utilized, the initialization of a quantum state is realized by using near-saturation external pump light, the line width is narrowed, and the magnetic measurement sensitivity is improved; noise in the environment is filtered out in a modulation and demodulation mode, and high-robustness extraction of quantum information is achieved. By enhancing the laser pumping power, the emission speed of the solid-state quantum color center ensemble fluorescence photons is increased, the full width at half maximum of a magnetic resonance curve is compressed, and the measuring capacity of the solid-state quantum color center to a magnetic field is improved; accurate measurement of external magnetic field signals through the solid quantum color center in the diamond is realized.

The present application relates to a kind of strong turbulent ammonia combustion flame internal structure and temperature field measurement system, a small amount of oxygen-containing fuel is added in strong turbulent ammonia combustion field to generate CH2O mark preheating zone, a Nd:YAG pumping laser is used to emit 355nm and 532nm laser simultaneously, wherein 355nm laser is used to excite CH2O and Rayleigh scattering signal;303nm laser is obtained after 532nm laser pumps dye laser to be frequency doubled, for exciting NH;CH2O fluorescence signal, Rayleigh scattering signal and NH fluorescence signal are detected by using three ICCD cameras distribution.By the present application, it can be realized to use a set of Nd:YAG, dye laser and three ICCD cameras, the synchronous measurement of ammonia combustion flame preheating zone, reaction zone and temperature field.

The invention relates to a non-collinear near-field ultrafast pumping-detection integrated circuit local thermalization measuring device and method. The invention relates to the technical field of ultrafast optical measurement and integrated circuit thermal management, and is used for realizing high temporal-spatial resolution characterization of a local ultrafast thermalization process of an integrated circuit material and device under a nanoscale. According to the invention, a femtosecond laser pumping-detection technology, near-field optical probe detection and a precise time delay and space positioning control system are comprehensively utilized, and the device can be used for researching an energy relaxation dynamic process under electron-phonon coupling, interface heat transport and extreme excitation conditions.

The invention provides a laser pumping automatic test device and method, the device comprises three measurement functions of a divergence angle, wavelength and power, the value of the divergence angle is measured by rotating and swinging a measuring head in a light beam path and recording and calculating light intensity distribution point by point, and finally, an NA value is calculated; the wavelength is measured by a spectrograph probe integrated into the integrating sphere; the power is indirectly measured by a photodiode integrated in the integrating sphere. The whole machine of the laser pump automatic testing device is composed of a stock bin, a first storage station, a second storage station, a laser beam divergence angle measuring mechanism, a water wiping mechanism, a wavelength power testing mechanism and a discharging bin, and a laser pump is placed in a customized jig and fixed. And the double-end manipulator completes automatic production conversion of the pumping source among the stations through the carrying jig. According to the laser pumping automatic testing device provided by the invention, automatic testing of three measuring functions of laser divergence angle, wavelength and power can be realized, and the testing precision is relatively high.