53results about How to "Strong restrictive ability" patented technology

The present invention discloses one kind of composite material of modified micro plant fiber powder and natural rubber and its preparation process and application. The composite material includes natural rubber or latex 100 weight portions, modified micro plant fiber powder 1-60 weight portions, sulfur 0.5-3.3 weight portions, promoter 1.2-4.3 weight portions, antiager 1-3 weight portions and other assistant. The preparation process includes mixing, forming, vulcanizing and other steps. The composite material has high tensile strength, high tearing strength, high ageing resistance, high virus permeation resistance, etc. and may be used widely in making urinary catheter, blood transfusion tube, condom, medical gloves and other products.

The invention discloses a silicon photonics integration multi-wavelength optical sending and receiving module relating to the integration photonics structure field of the optical fiber communication field. The sending and receiving module comprises an optical sending unit and an optical receiving unit; when the optical sending unit carries out sending, the laser sent by a laser is filtered into multi-wavelength optical waves with equal wavelength intervals by silicon-based micro-ring filters; the multi-wavelength optical waves are respectively filtered by every silicon-based micro-ring modulator so as to obtain needed wavelengths; the optical waves with the wavelengths are loaded and modulated into optical signals; the optical signals are output to a silicon-based array waveguide grating; the silicon-based array waveguide grating combines the optical signals output by the silicon-based micro-ring filters; the combined optical waves are coupled to an optical fiber through silicone waveguide. According to the invention, the quantity of the sent optical waves can be increased; the wavelength intervals of the optical waves can be controlled; the integration degree is relatively high; the cost is relatively low; and the module of the invention can satisfy the need of a user and is applicable to popularization.

The invention discloses a thin-film lithium niobate single-polarization waveguide and a preparation method thereof, which belong to the field of integrated photonics. The thin-film lithium niobate single-polarization waveguide comprises an upper cladding, a lithium niobate thin film waveguide core layer, a lower cladding and a substrate layer from top to bottom, wherein the lithium niobate thin film waveguide core layer comprises a ridge-shaped waveguide and groove-shaped regions located on the two sides of the ridge-shaped waveguide; the width and the etching depth of the ridge-shaped waveguide are smaller than a cut-off value existing in a TM0 mode, and the TM0 mode in the ridge-shaped waveguide and a TE1 mode in the groove-shaped regions are subjected to cross coupling; and the width value of the groove-shaped regions enables the TE1 mode coupled from the TM0 mode in the ridge-shaped waveguide to the groove-shaped regions on the two sides to be coherent with the TM0 mode leaked to the groove-shaped regions. By optimizing geometric parameters of the micro-nano optical waveguide structure, the waveguide structure only supporting TE0 mode stable transmission is obtained. The thin-film lithium niobate single-polarization waveguide is high in light field limiting capacity, the integration degree of the device is improved, and the technological process is simplified.

The invention discloses a method for screening bio-control bacteria of cucumber fusarium wilt, and provides a method for identifying the bio-control nature of to-be-identified bacteria to pathogenic bacteria of the cucumber fusarium wilt including experimental treatment. The experiment treatment sequentially includes following steps of 1), accelerating sprouting of sterilized cucumber seeds to obtain the sprouting seeds; 2), subjecting the sprouting seeds to soaking in suspension liquid of the to-be-identified bacteria prior to cultivating the sprouting seeds till radicle length reaches by 1.5-2.0cm; 3), inoculating cucumber seedlings to suspension liquid of the pathogenic bateria of the cucumber fusarium wilt; 4), transferring the cucumber seedlings to MS solid media to cultivate, and identifying the bio-control nature of the to-be-identified bacteria to the patheogenic bacteria of the cucumber fusarium wilt by surveying disease indexes and / or observing disease phenotypes. The method is applicable to screening the bio-control bacteria of the cucumber fusarium wilt. In the method, the cucumber seedlings used as samples can truly reflect disease prevention effect of the bio-control bacteria, and can screen bacterial strains of various bio-control mechanisms.

The invention discloses a strain multiple quantum well laser device based on GeSn / SiGeSn material and a manufacturing method thereof. A barrier layer adopts a GeSiSn material; and the barrier layer adopts a GeSn material. A pseudo substrate (Ge), a buffer layer (GeSn) and an active area (GeSn / GeSiSn) are vertically distributed on a substrate (Si) from bottom to top in sequence, and an Si3N4 tensile stress film is wrapped around the pseudo substrate, the buffer layer and the active area. The manufacturing method of the laser device disclosed by the invention comprises the following steps: (1) adopting a low-temperature solid-source molecular beam epitaxy growth technology to grow the GeSn and GeSiSn materials; and (2) adopting a standard laser device manufacturing technology to process the device. Through a multiple quantum well structure and the tensile strain introduced by the additionally added Si3N4 stress film, red shift occurs for the laser wavelength of the laser device, the optical gain of the laser device is obviously improved, and the threshold value is greatly reduced.

The invention provides a control swap gate optical logic device based on micro-ring resonators. The control swap gate optical logic device is characterized in that the control swap gate optical logic device is composed of four micro-ring resonators MRR made of a semiconductor material on an insulator and five Y-branch couplers, wherein three inputs are electrical signals to be operated and one continuous optical signal located at an operating wavelength position, an output result is an optical signal obtained after control swap gate calculation is conducted on the electrical signals, the optical signal can be transmitted in an optical fiber and directedly undergoes next-stage optical information processing. The control swap gate optical logic device is provided with the three electric pulse sequence inputs to be calculated, and an output is an optical pulse sequence obtained after calculation. A control swap gate optical logic device manufacturing process is completely compatible with a COMS process, so that the device is small in size, high in speed, low in power consumption and convenient to integrate and is hopeful to play the important role in a photon computer.

The invention provides a silicon-based optical Peres gate reversible logic device based on a micro-ring resonator, and belongs to the technical field of optical logic calculation. The device comprisesfive micro-ring resonators and two Y-branch couplers. According to the invention, the optical Peres gate reversible logic device has three to-be-calculated electric pulse sequence inputs, and the output is calculated light pulse sequence; and the manufacturing process of the device is completely compatible with a COMS process, so that the device is small in size, high in speed, low in power consumption and convenient to integrate, and is expected to play an important role in a photon computer.

The invention discloses a method for manufacturing a quantum dot field effect transistor array. The method comprises the following steps of: selecting an epitaxial wafer, coating photoresist on the epitaxial wafer to corrode the epitaxial wafer to form a table board to form a source-drain channel, wherein sources in a same row are connected together during photoetching; evaporating an electrode on a source and a drain to carry out electrode annealing to form ohmic contact of the source, the drain and a conductive channel; evaporating a transparent electrode to photoetch grids between the source and the drain, wherein the grids in the same row are connected together; evaporating an insulating layer on the surface and exposing source-grid electrode welding tables at each row and at two ends of the epitaxial wafer; photoetching and corroding the insulating layer to enable the drain to be exposed, evaporating alloy, and utilizing a stripping technique to enable the drains at a same column to be connected together; and coating the photoresist to realize protection and surface passivation. Through the method for manufacturing the quantum dot field effect transistor array, disclosed by the invention, a problem that the common CCD (charge coupled device) can not effectively perform low-light detection is solved, the power consumption is low, and a purpose of high-gain low-light detection of image capture is realized under a weak light condition.

The invention discloses a laser and a manufacturing method thereof. The laser comprises a substrate and a double-ridge waveguide; the double-ridge waveguide comprises a lower ridge waveguide and an upper ridge waveguide; the lower ridge waveguide is formed on the substrate and comprises a light spot amplification layer, a first spacer layer, a grating layer, a second spacer layer and an active layer sequentially from bottom to top; the upper ridge waveguide is formed on the lower ridge waveguide and comprises a cladding layer and a cover layer from bottom to top; and the upper ridge waveguidecomprises two sections of wedge-shaped waveguides and a section of straight waveguide, wherein the two sections of wedge-shaped waveguides are respectively distributed at two ends of the straight waveguide. The high-power laser is realized, and at the same time, the coupling efficiency of the laser and an optical fiber is improved, and the power consumption and cost are effectively reduced.

The invention provides a reversible optical exclusive or logic device based on microring resonators. The reversible optical exclusive or logic device consists of two microring resonators and a Y-shaped branch coupler, two electrical pulse sequence inputs to be calculated and optical pulse train outputs subjected to exclusive or calculation; the inputs and the outputs are in one-to-one correspondence. A manufacturing process of the reversible optical exclusive or logic device provided by the invention is completely compatible with a COMS (Complementary Metal Oxide Semiconductor) process, so that the device is small in size, quick in speed, low in power consumption and convenient for integration, and is expected to play an important role in photon computers.

The invention provides a transformer parameter online calculation method which is characterized by specifically comprising the following steps: 1) establishing a T-shaped equivalent circuit model according to a transformer circuit structure; 2) constructing a target function J which includes a voltage loop equation, an active loss equation, an input impedance equation, a no-load current equation and a no-load loss equation and is used for solving the high-voltage side resistance R1, the high-voltage side leakage reactance X1, the low-voltage side resistance reduction value R2 ', the low-voltage side leakage reactance reduction value X2', the excitation resistance Rm and the excitation reactance Xm, 3) taking the above formula J as a target function, and selecting an optimization algorithmfor optimization calculation to obtain an optimal solution of R1, X1, R2 ', X2', Rm and X3. According to the transformer parameter online calculation method, electrical measurement data during steady-state operation of the transformer are utilized, transformer equivalent circuit parameters such as winding resistance, leakage reactance and equivalent excitation branch impedance can be calculated and identified online, and the transformer parameter online calculation method has the advantages of small identification error and high precision.

The invention provides a three-valued optical reversible logic device based on microring resonators. The three-valued optical reversible logic device is composed of the four microring resonators and two Y branch couplers. Three electric pulse sequences to be calculated are input into the three-valued optical reversible logic device, and calculated optical pulse sequences are output. The manufacturing process of the three-valued optical reversible logic device is completely compatible with a COMS process, and therefore the device is small in size, high in speed, low in power consumption and convenient to integrate, and advantageously plays an important role in photon computers.

The invention discloses an information prompting method and device, and relates to the field of information technology. Through the information prompting method and device, sending of information content can be separated from information prompting on the aspect of time, so that the information content is prompted and presented for an opposite side at a most appropriate moment. According to the embodiment of the invention, the information prompting method comprises the following steps: receiving information edited by a user, wherein the information comprises characters, pictures or voice; receiving an information prompting trigger logic selected by the user, wherein the information prompting trigger logic is used for prompting receiving equipment through an information prompting way when a set information prompting condition is satisfied; and transmitting the information and the information prompting trigger logic to the receiving equipment in order that information prompting is triggered to prompt the receiving equipment of the reception of the information when the information prompting trigger logic is met. The scheme provided in the embodiment of the invention is suitable to be adopted in information prompting.

The invention discloses a winglet device which comprises a wingtip connecting part (1), ratchet wheel sleeves (2), ratchet wheel rods (3) and pressing bolts (4), wherein the wingtip connecting part (1) is connected to a wingtip of a wing; one side of the wingtip connecting part (1) is provided with two or more U-shaped grooves; two inner end surfaces of each U-shaped groove are respectively provided with a ratchet wheel groove in the shape of a non-revolving body and a threaded hole; the ratchet wheel sleeve (2) is arranged in the ratchet wheel groove, the shape of each ratchet wheel sleeve is consistent with that of the corresponding ratchet wheel groove, and a ratchet-wheel-shaped through hole is formed in each ratchet wheel sleeve; each ratchet wheel rod (3) comprises a ratchet wheel part and a connecting part, wherein the connecting part is connected to the winglet, the periphery of the ratchet wheel part is consistent with the through hole in shape, and the ratchet wheel part is arranged in the through hole of the ratchet wheel sleeve (2) in a sleeved mode; a threaded end of each pressing bolt (4) is screwed in the corresponding threaded hole, and the other end of each pressing bolt (4) axially presses one end surface of the corresponding ratchet wheel rod (3) connecting part to limit axial movement of the corresponding ratchet wheel rod (3). According to the winglet device, the ratchet wheel structure is relatively small in space occupancy, lighter in weight and highly adjustable in angle.

The invention relates to a transformer internal fault on-line monitoring method which is characterized by specifically comprising the following steps: (1) establishing a T-shaped equivalent circuit model according to a transformer circuit structure; (2) constructing a target function J shown in the following formula (I), wherein the target function is used for solving a high-voltage side resistorR1, a high-voltage side leakage reactance X1, a low-voltage side resistor reduction value R2', a low-voltage side leakage reactance reduction value X2', an excitation resistor Rm and an excitation reactance Xm; (3) under the normal condition of the transformer, selecting an optimization algorithm to carry out optimization calculation by taking the formula J as the target function to obtain optimalsolutions and corresponding fitness of R1, X1, R2', X2', Rm and Xm, (4) carrying out online monitoring on the transformer, and (5) comparing and judging a fault type. According to the transformer internal fault on-line monitoring method, the equivalent circuit parameters of the transformer, such as winding resistance, leakage reactance and equivalent excitation branch impedance, are judged through on-line calculation and identification, the windings and iron cores can be monitored in real time, the classification monitoring of different internal faults is achieved, and the method has higher sensitivity for slight iron core faults or slight turn-to-turn short circuits.

The invention discloses an indent-size subway tunnel / train compartment dual-long and narrow space fire experiment platform. The fire experiment platform comprises a tunnel unit, a train unit, a railway unit, a fire source simulation unit, a longitudinal ventilation unit and a fire parameter measurement unit, wherein the tunnel unit adopts an arc-shaped ceiling structure and is located on the ground; the train unit is placed in the tunnel unit and controlled by the railway unit on the ground to move; the fire source simulation unit is placed in the train unit and used for generating fire plumesrequired by an experiment; the longitudinal ventilation unit is placed at one end of the tunnel unit and used for providing longitudinal ventilation; the fire parameter measurement unit is used for collecting various parameters in the experiment. By means of the fire experiment platform, the defects that a full-size experiment is high in cost, and numerical simulation is not precise enough are overcome, research on a series of basic theories of the entrainment characteristics of the fire plumes, smoke transportation behaviors and the like generated when a train fire occurs in a tunnel can bedeveloped, and the platform has a practical guiding significance for fire detection, smoke control and personnel evacuating in a fire scene.

The invention discloses a high-gloss colorful pearlescent PET master batch. The high-gloss colorful pearlescent PET master batch comprises, by weight, 75-85 parts of PET, 8-15 parts of PMMA, 3-8 partsof a toner, 0.2-3 parts of a scraping resistant agent and 0.1-0.5 part of a lubricant. A preparation method of the high-gloss colorful pearlescent PET master batch comprises the following steps: rawmaterials are weighed according to above weight part proportions, are added into a high-speed mixer, and are uniformly stirred, the obtained mixture is added into a homodromous double screw extruder,and is blended, extruded and drawn, the obtained mixture is pelletized to obtain a preliminary master batch, and the preliminary master batch is dried to obtain the finished master batch. Compared with the prior art, the preparation method prepares the high-gloss colorful pearlescent PET master batch with a face pearl-like gloss without adding pearl powder; and he pearlescent master batch has theadvantages of good dispersibility and tinting strength, dust-free and environmentally-friendly processing and using process, simple manufacturing technology, low production cost and wide uses.

The invention discloses a method for manufacturing a laser chip for water vapor detection. The method comprises the following steps of: 1, epitaxially growing an InP buffer layer, a lower waveguide layer, a multi-quantum well structure, an upper waveguide layer and a p-n inversion layer on an n-type InP substrate sequentially; 2, making a recoupling grating on the p-n inversion layer and the upper waveguide layer by using a holographic exposure method; 3, secondarily epitaxially growing a first p-InP cover layer, an etching stop layer, a second p-InP cover layer and a p-InGaAs contact layer on the recoupling grating; 4, corroding to form a ridge-type waveguide structure on the second p-InP cover layer and the p-InGaAs contact layer, and depositing a silicon dioxide layer in a large area; 5, etching the silicon dioxide layer in the middle of the ridge-type waveguide structure so as to form a window; and 6, sputtering to form a P-surface electrode and evaporating to form an N-surface electrode on the surfaces of the ridge-type waveguide structure and the window.

The invention discloses an optical waveguide type light combiner which comprises a plurality of optical waveguides for light incidence and a plurality of light wave coupling parts, and at most one section of light wave coupling part is arranged between any two optical waveguides for light incidence. The optical waveguide for light incidence includes a base layer, a core layer, and a cladding layer, and the relative refractive index difference between the core layer and the cladding layer is [Delta] 10%. When a plurality of beams of incident light are driven, the incident light forms a beam of emergent light after being coupled by the light wave coupling part, and the emergent light is emitted from the non-incident end of the optical waveguide for propagating the incident light with the non-longest wavelength. The invention further discloses a projection device adopting the optical waveguide type light combiner. Compared with the prior art, the optical waveguide type light combiner disclosed by the invention is high in light limiting capability, and the usable bending radius is smaller; a plurality of beams of light in different waveguides can be efficiently combined into one beam of waveguide; the overall coupling power loss of the light combiner is less than 25% of the incident light power.

The invention relates to a distributed optical fiber sensing device capable of monitoring a steel beam crack and a monitoring method. The device comprises a sensing optical fiber to be measured, the sensing optical fiber to be measured is a photonic crystal optical fiber, the outer portion of the photonic crystal optical fiber is wrapped by epoxy resin adhesive glue, and the photonic crystal optical fiber is pasted to the upper surface of the steel beam in the length direction of the steel beam; the photonic crystal fiber is electrically connected with a BOTDA strain analyzer, and a bracket is arranged at the bottom of the steel beam; hooks are arranged at two ends of the steel beams; and fiber bragg gratings are arranged at the joints of the steel beams. The photonic crystal fiber is used for replacing a single mode to carry out health monitoring on the steel beam structure, Brillouin gains are two orders of magnitude higher than those in a traditional single-mode fiber, and detection of Brillouin signals is facilitated. Besides, another sensing parameter can be separated from the cladding structure of the photonic crystal fiber and can be used for expanding a new sensing function, and the reliability and the expandability of the detection system are improved.

A winglet device with adjustable angle includes a wingtip holder (1), insert blocks (2), connecting rods (3) and compression springs (4). The wingtip holder (1) is connected with the wingtip; one side of the wingtip holder (1) is provided with two or more grooves; both ends of each groove are respectively provided an insert block groove in a non-rotating shape and a blind hole; the shape of the insert blocks (2) is consistent with the shape of the insert block grooves, and the insert blocks are inserted into the insert block grooves; the outer end face of each insert block (2) is provided with a ring of adjustment grooves circumferentially arranged, and each adjustment groove forms a centrosymmetric figure along the center of the circumference; one end of each connecting rod (3) is provided with a ring of projections matching with the adjustment grooves, the projections are in the adjustment grooves, and the connecting rods (3) are connected with the winglet; and one end of each compression spring (4) is arranged in the blind hole, and the other end of each compression spring abuts against the other end face of the connecting rod (3) and is axially compresses the connecting rod (3). The winglet device has the advantages of small space occupation, light weight, and the many adjustable angles.

The invention discloses an information prompting method and device, and relates to the field of information technology. Through the information prompting method and device, sending of information content can be separated from information prompting on the aspect of time, so that the information content is prompted and presented for an opposite side at a most appropriate moment. According to the embodiment of the invention, the information prompting method comprises the following steps: receiving information edited by a user, wherein the information comprises characters, pictures or voice; receiving an information prompting trigger logic selected by the user, wherein the information prompting trigger logic is used for prompting receiving equipment through an information prompting way when a set information prompting condition is satisfied; and transmitting the information and the information prompting trigger logic to the receiving equipment in order that information prompting is triggered to prompt the receiving equipment of the reception of the information when the information prompting trigger logic is met. The scheme provided in the embodiment of the invention is suitable to be adopted in information prompting.

The invention discloses a deep ultraviolet LED with an AlGaN / h-BN multi-quantum well structure, which comprises: a substrate, an AlN template layer, an n-type Al x Ga 1‑x N layer, Al y Ga 1‑y N / h‑BN multiple quantum well layer, p-type Al z Ga 1‑z N layer, p-type GaN contact layer. Al y Ga 1‑y N / h‑BN multiple quantum well layers including: Al y Ga 1‑y N quantum well layer and h-BN quantum barrier layer; wherein, Al y Ga 1‑y The range of Al composition y in the N quantum well layer is 0.5≤y≤0.7, and the thickness is 2-4nm; the thickness of the h-BN quantum barrier layer is 5-10nm. The disclosure can improve the problems of difficult hole injection, electron leakage and mismatch stress of the deep ultraviolet LED, thereby improving the luminous efficiency of the deep ultraviolet LED.

The invention discloses a winglet device which comprises a wingtip connecting part (1), ratchet wheel sleeves (2), ratchet wheel rods (3) and pressing bolts (4), wherein the wingtip connecting part (1) is connected to a wingtip of a wing; one side of the wingtip connecting part (1) is provided with two or more U-shaped grooves; two inner end surfaces of each U-shaped groove are respectively provided with a ratchet wheel groove in the shape of a non-revolving body and a threaded hole; the ratchet wheel sleeve (2) is arranged in the ratchet wheel groove, the shape of each ratchet wheel sleeve is consistent with that of the corresponding ratchet wheel groove, and a ratchet-wheel-shaped through hole is formed in each ratchet wheel sleeve; each ratchet wheel rod (3) comprises a ratchet wheel part and a connecting part, wherein the connecting part is connected to the winglet, the periphery of the ratchet wheel part is consistent with the through hole in shape, and the ratchet wheel part is arranged in the through hole of the ratchet wheel sleeve (2) in a sleeved mode; a threaded end of each pressing bolt (4) is screwed in the corresponding threaded hole, and the other end of each pressing bolt (4) axially presses one end surface of the corresponding ratchet wheel rod (3) connecting part to limit axial movement of the corresponding ratchet wheel rod (3). According to the winglet device, the ratchet wheel structure is relatively small in space occupancy, lighter in weight and highly adjustable in angle.

The invention discloses a yarn guide pulley for a diamond wire-electrode cutting lathe, which is a "-"-shaped slot nonmetal guide pulley. A preparation method comprises the following steps: S1, processing a nonmetal composite material to a ring shape; and S2, processing a "-"-shaped slot in the ring shape in the S1 according to diameter of the yarn and processing four fixed screw holes according to square distribution to obtain the "-"-shaped slot nonmetal guide pulley. Compared with the prior art, the loss of the diamond yarn can be reduced and the cutting quality can be improved.

The invention discloses a winglet connecting device for an aviation aircraft. The device comprises a wingtip support and wingtip connecting units, wherein each wingtip connecting unit comprises an embedded block, a connecting rod and a holddown spring; the wingtip support adopts a half-cylinder body; the wingtip support is fixed on a wing end through a plane of a side part on one side of the half-cylinder body; a plurality of grooves used for mounting the wingtip connecting units are formed in a cylindrical surface on the other side of the half-cylinder body; a non-circular embedded block groove is formed in one side wall surface in a groove; a blind hole is formed in the other side wall surface in the groove; the embedded block can be clamped in the embedded block groove in a matching manner; a plurality of dividing plug sockets uniformly distributed along a circumference are formed in the outer end surface of the embedded block; one end of the connecting rod is used for being connected with a winglet; one side surface of the other end part of the connecting rod forms a plane; a plug is arranged on the other side surface of the other end part of the connecting rod; one end of thehold-down spring is positioned in the blind hole; the other end of the hold-down spring is propped against the plane on one side of the connecting rod. The device is small in occupied space and low inweight and has more adjustable angles.

The utility model provides a periodically poleddomain reverse lithium niobate optical waveguide which comprises a substrate, a waveguide layer arranged on the substrate, an upper photonic crystal and a lower photonic crystal; the lower photonic crystal is grown between the substrate and the waveguide layer; the upper photonic crystal is grown on the waveguide layer; the upper photonic crystal andthe lower photonic crystal can lead both the fundamental frequency light-wave length and the frequency doubling light-wave length of the periodically poleddomain reverse lithium niobate optical waveguide in a photonic forbidden band; and one-dimensional, two-dimensional or three-dimensional photonic crystals are adopted as the upper photonic crystal and the lower photonic crystal. As the photoniccrystals are both prepared on an upper coating and a lower coating of the waveguide layer, and the periodically poleddomain reverse lithium niobate optical waveguide is combined with the photonic crystals, the optical waveguide loss is low and the conversion efficiency is high.

The invention discloses a concrete external curing agent, which belongs to the technical field of building materials. The external curing agent for concrete developed by the present invention is mainly composed of β-sitosterol, phospholipid, water, vegetable oil, drying oil, polyallylamine, defoamer and calcium bicarbonate, and after first stirring and mixing the β-sitosterol and phospholipid , pour into the preheated vegetable oil, then add dry oil to obtain an oil phase; stir and mix water and polyallylamine, then add calcium bicarbonate, preheat to obtain a water phase; Add the oil phase to the water phase. After the oil phase is added, add the defoamer, continue stirring and mixing at a constant temperature for 40-60 minutes, discharge, and fill to obtain the concrete external curing agent. The product developed by the invention has good storage stability, can significantly improve the performance of the concrete after curing, and does not cause secondary pollution to the environment after use.

The invention discloses a strain multiple quantum well laser device based on GeSn / SiGeSn material and a manufacturing method thereof. A barrier layer adopts a GeSiSn material; and the barrier layer adopts a GeSn material. A pseudo substrate (Ge), a buffer layer (GeSn) and an active area (GeSn / GeSiSn) are vertically distributed on a substrate (Si) from bottom to top in sequence, and an Si3N4 tensile stress film is wrapped around the pseudo substrate, the buffer layer and the active area. The manufacturing method of the laser device disclosed by the invention comprises the following steps: (1) adopting a low-temperature solid-source molecular beam epitaxy growth technology to grow the GeSn and GeSiSn materials; and (2) adopting a standard laser device manufacturing technology to process the device. Through a multiple quantum well structure and the tensile strain introduced by the additionally added Si3N4 stress film, red shift occurs for the laser wavelength of the laser device, the optical gain of the laser device is obviously improved, and the threshold value is greatly reduced.