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针对一种将多个半导体激光器(LD)芯片串联驱动,通过光纤耦合进行功率合成,构成光纤耦合高功率输出激光模块的特殊驱动要求,研发了小型化高效率激光电流源组件和小型化高效率半导体制冷(TEC)LD模块温度控制组件。组件工作温度范围为-45℃～55℃,实验证明达到了设计性能指标要求。建立了LD模块驱动电流源电路的数学模型,提出了LD模块电流源控制电路的数字化实现方法,并利用ADuC831单片机实现了数字化设计。给出了一种基于TEC的LD模块温度控制组件的结构,建立了简化、实用的温度控制系统数学模型,对TEC的性能系数ξ、控制端的热量Qc和TEC的工作电流I进行了寻优控制,减小了激光器输出波长随温度的漂移。
Aiming at the special driving requirements of a series of LD lasers driven by fiber coupling for power synthesis to form a fiber-coupled high power output laser module, miniaturized high-efficiency laser current source components and miniaturized high-efficiency Semiconductor Cooling (TEC) LD Module Temperature Control Module. Component operating temperature range of -45 ℃ ~ 55 ℃, the experiment proved to meet the design performance requirements. The mathematic model of LD module driver current source circuit is established. The digital realization method of LD module current source control circuit is proposed, and the digital design is realized by using ADuC831 single chip microcomputer. The structure of temperature control module based on TEC is given. A simplified and practical mathematic model of temperature control system is established. The coefficient of performance ξ, the heat Qc at the control end and the operating current I of TEC are optimally controlled , Reducing the laser output wavelength drift with temperature.