9 results about "Laser synthesis" patented technology

The invention provides a preparation method and application of a precursor for laser synthesis of a MoS2 (WS2) film, and belongs to the technical field of semiconductor film materials.The preparation method comprises the following steps that S1, a container is placed in a water bath heating environment, deionized water, a molybdenum source or a tungsten source and a sulfur source are added, and a supersaturated solution is obtained after continuous stirring; and S2, in a water bath heating environment, adding a nonionic surfactant into the supersaturated solution, continuously stirring, and filtering after the nonionic surfactant and the supersaturated solution are fully mixed to obtain a precursor solution. Coating a substrate with the precursor solution, and drying the coated substrate; and irradiating the precursor solution coated on the substrate by using a laser beam to obtain the MoS2 (WS2) film. The process is simple and easy to implement, and rapid and low-cost preparation of the MoS2 (WS2) film can be realized.

The invention relates to the technical field of laser synthesis, and discloses a cross-environment self-adaptive laser coherent synthesis method, equipment and a medium. The method comprises the following steps: constructing environment distribution containing various parameter combinations, and randomly sampling an environment from the environment distribution at the beginning of each training period; training an adaptive strategy network based on a sampled environment; deploying the trained adaptive strategy network to a laser coherent combination system, and fixing network parameters of the adaptive strategy network; and updating the internal memory state through initial interaction between the self-adaptive strategy network and the current environment, and outputting a phase correction instruction to perform phase control of laser synthesis. According to the method, the environment overfitting problem existing in laser coherent synthesis in traditional reinforcement learning is solved, rapid self-adaption can be achieved only through a small amount of initial interaction, the debugging cost of system deployment and scene switching is greatly reduced, different noise, turbulence intensity and laser array scales can be adapted, and the stable and efficient phase locking control effect is always kept.

The invention provides a pulse laser polarization coherent beam combining system. The pulse laser polarization coherent beam combining system comprises a beam combining device, a polarization beam combiner, a first polarization controller, a second polarization controller and a phase control module. The beam combiner is used for combining the first sub-pulse laser and the second sub-pulse laser which are incident at the same time into main power linearly polarized light and secondary power linearly polarized light, and the energy proportion of the main power linearly polarized light is larger than that of the secondary power linearly polarized light; and the polarization beam combiner is used for receiving the primary power linearly polarized light and the secondary power linearly polarized light, carrying out beam combination and forming coherent output. By arranging a polarization controller and a phase control module, polarization state and phase adjustment is carried out on the primary power linearly polarized light and the secondary power linearly polarized light respectively, so that efficient coherent beam combination of the primary power linearly polarized light and the secondary power linearly polarized light is realized in the polarization beam combiner. According to the system, the strict requirements on the incident sub-pulse laser polarization state and power are relaxed, the beam combining efficiency is improved, the system is suitable for various polarization state inputs, and the universality and practicability of the system are enhanced.

The invention provides a spectrum synthesis device based on optical fiber laser polarization. A seed laser generator outputs multiple sets of seed laser at the same time, and a first beam splitter divides each set of seed laser into multiple beams of branch laser; the output characteristics of the branch lasers are modulated through the output characteristic controller, the branch lasers are synthesized through the polarization synthesizer to obtain synthesized lasers used for spectrum synthesis, the synthesized lasers are conveyed to the spectrum synthesizer through the coupling optical fiber, and spectrum synthesis is carried out on the multiple sets of lasers with different wavelengths to obtain synthesized lasers used for spectrum synthesis. And secondly, a first signal detector is further arranged on the side wall of the coupling optical fiber, power data of the synthesized laser is detected through the first signal detector, an output characteristic controller is controlled according to the power data, and the output characteristic of the synthesized laser is controlled through the output characteristic controller. The first signal detector can realize detection of synthesized laser power data without using high-power laser splitting, so that the structure of the spectrum synthesis device is simplified.

The invention discloses a method for preparing multi-component liquid alloy by laser at room temperature. The method comprises a substrate loaded with a precursor and a laser. The specific method comprises the following steps: firstly, uniformly mixing precursors of metal elements, further performing ultrasonic mixing on the precursors and liquid metal particles subjected to ultrasonic treatment, then transferring the mixture into a beaker, and performing laser synthesis and ultrasonic treatment in a liquid phase environment, so that the precursor salt is converted into the multi-element liquid alloy. The method is simple to operate, low in cost, mild in reaction condition, rapid, efficient, environment-friendly and pollution-free. The technology provided by the invention can realize the preparation of the multi-component liquid alloy at room temperature.

The invention discloses an SPGD laser coherent synthesis method and system based on Kalman filtering prediction, and the method comprises the following steps: S1, calculating the variable quantity of a performance evaluation function and an original gradient vector, and taking the component of the original gradient vector as a measurement value of a Kalman filter; s2, on the basis of a preset state space model, predicting a relative phase state between each path of laser and the reference laser through a Kalman filter to obtain a predicted state; s3, fusing the measurement value and the prediction state through a Kalman filter to obtain optimal estimation; and S4, calculating a voltage correction value according to the optimal estimation, updating the control voltage of each path of laser based on the voltage correction value, and returning to the step S1 for cyclic execution to realize laser coherent combination. The conversion from reaction type control to predictive type control is realized, and control lag is made up to suppress dynamic noise; dependence on a single SPGD gain parameter is reduced, gain does not need to be increased for adaptive noise, and overshoot and oscillation are avoided; and the predictable characteristic of the noise is fully utilized.

The invention discloses a method for preparing a MoS2 film through laser synthesis, and belongs to the technical field of inorganic semiconductor film materials. The preparation method specifically comprises the following steps: uniformly mixing water, a molybdenum source, a sulfur source and a surfactant to obtain a precursor solution; carrying out plasma treatment on a substrate, then coating the substrate with the precursor solution, and drying the coated substrate; and radiating the precursor solution coated on the substrate by adopting a laser beam, so that the precursor solution forms the MoS2 film. The process is simple and easy to implement, and rapid and low-cost molybdenum disulfide film preparation can be achieved.

The invention discloses a multi-core optical fiber-based laser synthesis system, which comprises a laser device, a multi-core optical fiber, a light beam regulation and control device and a reflection grating, and is characterized in that the laser device is used for providing multiple paths of laser with different wavelengths; the multi-core optical fiber is provided with N fiber cores, each fiber core is a hollow fiber core, the input end of each fiber core is connected with the laser device, the output section of each fiber core is a straight line, the output section of each fiber core is provided with an emergent end face, and the emergent end faces of the fiber cores are arranged in a one-dimensional array or a two-dimensional array. The light beam regulation and control device is arranged between the output end of the multi-core optical fiber and the reflection grating, and the reflection grating is used for reflecting the multiple paths of laser output by the light beam regulation and control device and enabling the multiple paths of reflected laser to be on the same straight line, so that the multiple paths of laser gathered on the reflection grating are synthesized into one path of synthesized laser. A traditional synthesis light path design can be simplified, the size and the weight of the synthesis device are remarkably reduced, and the application range of the high-energy laser is further expanded.

This invention provides a laser synthesis wavelength measurement interferometer based on optimized fiber coupling. The interferometer includes: a composite laser source, a fiber coupler assembly, a fiber beam splitter assembly, a polarization beam splitter assembly, an adjustable optical path reference fiber, an adjustable optical path measurement fiber, a photodetector assembly, and an electronic control system, all interconnected. The composite laser source emits two laser beams with wavelengths λ1 and λ2 respectively. The fiber coupler assembly includes a first fiber coupler, a second fiber coupler, and a third fiber coupler. The fiber beam splitter assembly includes a first fiber beam splitter and a second fiber beam splitter. The polarization beam splitter assembly includes a first polarization beam splitter and a second polarization beam splitter. The photodetector assembly includes a first photodetector, a second photodetector, and a third photodetector. This invention improves the measurement accuracy of the interferometer, and damaged parts of the interferometer can be replaced individually, facilitating maintenance by repair personnel.