摘要
半导体激光器件是一种以电流注入作为激励方式的半导体器件,一般其输出波长的情况与温度的稳定程度密切相关,在这样的背景下,半导体激光器想要正常工作,半导体激光器件工作温度必须稳定。现有的设备均采用接触式测温,比较典型的为PT1000热敏电阻,存在测温响应速度慢,精准度较差等缺点。本文主要侧重于尝试使用非接触测温的方式实现对半导体激光器件表面温度的采集,T型热电偶对于中低温区有较好的测量精度。随着半导体激光器温度的变化,热电偶输出电压变化量为几十微伏,利用运算放大器对热电偶输出的电压放大,补偿运算放大器的输入失调电压。使用LM35对热电偶测温电路其冷端做温度方面的补偿。利用Proteus软件进行测温电路仿真,其结果表明,电路设计简便,测温精度高。
Semiconductor laser devices are semiconductor devices that use current injection as an excitation method,and their output wavelength is generally closely related to the stability of temperature.In this context,in order for semiconductor lasers to work properly,the operating temperature of semiconductor laser devices must be stable.The existing equipment adopts contact temperature measurement,and a typical one is the PT1000 thermistor,which has disadvantages such as slow temperature measurement response speed and poor accuracy.This article mainly focuses on attempting to use non-contact temperature measurement to collect the surface temperature of semiconductor laser devices.T-type thermocouples have good measurement accuracy for medium to low temperature regions.As the temperature of the semiconductor laser changes,the output voltage of the thermocouple varies by tens of microvolts.The operational amplifier amplifies the voltage output of the thermocouple to compensate for the input offset voltage of the operational amplifier.Use LM35 to compensate for the temperature of the cold end of the thermocouple temperature measurement circuit.The simulation of temperature measurement circuit using Proteus software shows that the circuit design is simple and the temperature measurement accuracy is high.
作者
王丹
王垚廷
Wang Dan;Wang Yaoting(Xi'an Technological University school of science,Xi'an,Shanxi 710021,CHN)
出处
《模具制造》
2023年第8期69-72,共4页
Die & Mould Manufacture
关键词
热电偶
非接触测温
半导体激光器
thermocouple
non-contact temperature measurement
semiconductor laser
