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reasing the number of luminous points and single tube laser optimization is the most widely used output power optimization method of high power semiconductor laser. Single tube laser optimization is one of the effective means. At present, the output power of single tube laser is more than 250000. In the optimization of conversion efficiency, the emphasis is on temperature control, carrier consumption control and threshold consumption control. Reliability is one of the key points of high power semiconductor laser optimization. At present, the main means to improve reliability are to optimize heat transfer structure, improve packaging technology, increase spot size, improve growth (crystal) quality and so on.