Research On Green Single Emitter Diode Laser Combination And Fiber Coupling Technology

In recent years,the development of photovoltaic devices and materials has made the performance of semiconductor lasers significantly improved,and semiconductor lasers have been more and more widely used.Compared with semiconductor lasers in the near-infrared range,the output power of visible-light semiconductor lasers is still at a low level,especially the high-power output of green-lighting semiconductor lasers is still a challenge.In order to achieve high power output,the most effective method at present is to use the combining technology and realize the fiber coupled output.Therefore,researching high-power semiconductor laser fiber coupling modules is of great significance for improving the total power of green-lighting semiconductor lasers and promoting the application of semiconductor lasers in more fields.In view of the above problems,this thesis conducts indepth research on beam collimation,combining and fiber coupling technology of greenlighting semiconductor laser fiber coupling module from the aspects of scheme design,theoretical simulation,and experimental verification,to improve its application value and expand its application.The scope is of great significance.Based on the research results of single-emitter semiconductor lasers at home and abroad and the development status of fiber-coupled technology,this paper designs and develops a highpower green-light single-emitter semiconductor laser fiber coupling module.The fiber coupling module utilizes a green light TO single-emitter as a light source,and realizes fiber coupled output through fast and slow axis collimation,beam split rearrangement,polarization combining,spatial combining and fiber coupling technology.Firstly,the paper introduces the optical design scheme of the green light single-tube semiconductor laser fiber coupling module in detail.Through the Zemax optical design software,the design and simulation of the TO single-emitter light source,collimation,combination and coupling optical system are completed.The theoretical simulation of the fiber-coupled output of the green-light semiconductor laser confirms the feasibility of the experiment.Based on the preliminary experimental design,the mechanical structure design of the fiber coupling module was completed.Through the process of device selection,adjustment,testing,etc.,40 green light TO single-emitter with an output power of 1 W and a center wavelength of 520 nm are coupled into an optical fiber with a core diameter of 200 μm and a numerical aperture of 0.22.The continuous output power of 27.58 W is obtained under a current excitation of 1.5 A,the corresponding fiber coupling efficiency is 94%,and the overall coupling efficiency is 69%.Finally,the thesis analyzes the experimental results and experimental errors,and the analysis results have a certain guiding role for the subsequent fiber coupling experiments.