半导体制冷器对SLD光源温控参数的影响

针对光纤陀螺用SLD光源与控制电路的匹配需求,探讨了SLD光源的重要光源组件——半导体制冷器对温度控制参数离散化的影响。结果表明,半导体制冷器(TEC)的等效内阻和制冷/加热效率的特性是目前SLD光源温控参数离散的主要原因;在当前温控模式下,TEC等效内阻对温控参数的影响最为显著,其由于工艺或使用条件变化等原因产生的任何微小差异均直接表现为温控参数的改变;TEC的制冷效率和加热效率对温控参数的影响不同,它们在制冷和加热过程分别促进和阻止温控参数的进一步离散。通过改进光源温控模式、加强光源规范管理、增强TEC的一致性,以及改进TEC制冷/加热效率,可大幅提高光源和温控电路的匹配效果。

Effect of thermoelectric coolers on temperature control of SLD

Aiming at the poor matching between SLD and its control circuits,this paper analyzes the effects of SLD’s semiconductor cooler on discretization of temperature control parameters and gives the solving methods.Results indicate that: 1) the main reasons of parameter discretization are the characteristics of equivalent resistance and cooling efficiency of TEC;2) Under the present temperature control mode,the equivalent resistance of TEC is the most important reason of parameter discretization,depending on techniques and conditions;3) The cooling and heating efficiency of TEC may accelerate or prevent dispersing of temperature control parameters.Changing the mode of temperature control,building the standard management of SLD,improving the consistency of TEC,and increasing the cooling efficiency of TEC would improve the match effects between SLD and its control circuits.