现代电子技术2024，Vol.47Issue(18)：77-82,6.DOI:10.16652/j.issn.1004-373x.2024.18.013
半导体激光器驱动器的SPICE仿真及其在气体传感系统的应用
SPICE simulation of semiconductor laser driver and its application in gas sensing system
摘要
Abstract
In order to improve the reliability and stability of laser,TINA-SPICE software is used to assist in the design of its driving circuit,and the design effect is verified by the experiments of electrical modulation and photoelectric detection system.The amplitude frequency characteristics and transient response of the constant current output circuit of the driver are simulated,potential current oscillation phenomena is predicted,and an easy-to-use scheme for compensating loop gain is proposed.The feasibility of this scheme was confirmed by comparing the simulation curves before and after compensation.On this basis,STM32H743 is used as the central processing core to graphically set and monitor the driving current parameters by clicking on the touch screen,thereby scheduling the operation of the laser driving circuit.At the ambient temperature of 296 K,the circuit is used to carry out the modulation characteristic experiment of semiconductor laser,and the modulation coefficient is 0.045 cm-1/mA by fitting the wavelength and current.The controller is introduced into the gas sensing system based on infrared spectral absorption technology to realize the quantitative analysis of methane gas.The analysis results show that the designed circuit can stably drive the laser and realize precise wavelength modulation,and the detection sensitivity of the obtained gas sensing system is lower than 8 ppm.关键词
半导体激光器/驱动电路/压控电流源/SPICE仿真/气体传感器/电调制/环路增益Key words
semiconductor laser/driving circuit/voltage-controlled current source/SPICE simualtion/gas sensor/electrical modulation/loop gain分类
信息技术与安全科学引用本文复制引用
丛梦龙,周昆鹏..半导体激光器驱动器的SPICE仿真及其在气体传感系统的应用[J].现代电子技术,2024,47(18):77-82,6.基金项目
国家自然科学基金项目(61963031) （61963031）
