用于气体检测的近红外半导体激光器温控系统  

A Temperature Controller for Near-infrared Semiconductor Laser Used in Gas Detection

作　　者：黄渐强[1] 翟冰[1] 何启欣 叶玮琳[2] 郑传涛[1] 王一丁[1] 

机构地区：[1]吉林大学电子科学与工程学院,集成光电子学国家重点联合实验室吉林大学实验区,长春130012 [2]汕头大学工学院,广东汕头515063

出　　处：《光子学报》2014年第6期36-41,共6页Acta Photonica Sinica

基　　金：国家自然科学基金(Nos.61307124;61077074);国家科技支撑计划项目(No.2013BAK06B04);吉林省科技发展计划项目(Nos.20120707;201101036);长春市国际合作项目(No.11GH01)资助;汕头大学科研启动基金(No.NTF12022);汕头大学青年科研基金(No.YR12005)

摘　　要：为了降低软件设计复杂度并提高分布反馈激光器发光波长的控制准确度及稳定性,设计了一种用于气体检测的半导体激光器温度控制系统,它由数字信号处理器、温度设定电路、温度采集电路、模拟比例-积分-微分电路、半导体制冷器控制电路等模块构成.利用该系统对用于水汽检测、中心波长为1 860nm的可调谐分布反馈激光器做了驱动实验,结果表明：该系统的有效控温范围为10℃~50℃,控温准确度为±0.05℃,温度稳定时间小于60s;改变温控系统的驱动电流和设定温度,测得的激光器工作波长呈现出良好的调谐特性;连续4天测得的4条光谱曲线几乎重合,表明该系统具有良好的稳定性.In order to decrease the design complexity of software and to enhance the control stability and accuracy of distributed feedback laser＇s emitting wavelength, a temperature controller for semiconductor laser used in gas detection was developed, which includes digital signal processor, temperature setting circuit, temperature sampling circuit, analog proportion-integration-differential circuit, thermal electric coiling control circuit, etc. A wavelength-tunable distributed feedback laser centered at 1 860 nm used for humidity detection was driven using the proposed temperature controller. Experimental results indicate that, the control scale on temperature is 10℃-50 ℃, the accuracy is ±0.05℃, and the temperature- established time is less than 60 s; with different driving current and temperature supplied by the system, the operation wavelength of the laser shows good tuning characteristies; the four spectral curves from four daysr measurements almost coincide with each other, demonstrating stable performances of the controller.

关 键 词：半导体激光器 温度控制 红外光谱学 模拟比例-积分-微分控制 

分 类 号：TH83[机械工程—仪器科学与技术]