大功率红外激光器高效驱动电源设计
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摘要
根据大功率红外激光器功率-电压-电流(Power-Voltage-Intensity of current,PVI)曲线的特点,提出一种双环控制结构的恒流驱动电源设计方案。硬件电流控制环路采用深度电流负反馈电路实现了高精度恒流驱动;数字式控制环路根据激光器工作电流实时调节DCDC输出电压,使得恒流电路中MOSFET稳态压降保持恒定,从而在保证电流控制精度的同时显著提升了系统效率。本文首先分析了激光器PVI曲线的特点,提出了系统总体设计思路,然后重点阐述了输出可调的DCDC电源模块和硬件恒流驱动电路的设计方法,并详细介绍通讯软件和DCDC电压控制算法的实现过程,最后给出了DCDC电源效率和电流控制的测试结果,通过与传统方案的对比测试验证了本设计在系统效率上的优势。
According to the Power-Voltage-Intensity of current(PVI) characteristic of high power infrared laser diode,one constant-current power scheme with two control loops is proposed.The hardware-based control loop performs high-precision current regulation; the software-based digital control loop is used to adjust the DCDC module output voltage according to the laser′s working current,and thus maintains the steady-state voltage drop of MOSFET in constant-current circuit almost constant.This type of structure effectively reduces the power consumption,and meanwhile holds high current accuracy.Firstly,the PVI characteristic is analyzed and the system structure is proposed.Then the design principle of the constant-current driver circuit and high-efficiency DCDC power supply circuit with adjustable output voltage are designed.The implement of communication protocol and the control algorithm of DCDC output voltage are discussed in detail.Finally,DCDC efficiency and laser current control effect are given,and the comparison test result further reveals the efficiency advantage of the proposed design scheme.
According to the Power-Voltage-Intensity of current(PVI) characteristic of high power infrared laser diode,one constant-current power scheme with two control loops is proposed.The hardware-based control loop performs high-precision current regulation; the software-based digital control loop is used to adjust the DCDC module output voltage according to the laser′s working current,and thus maintains the steady-state voltage drop of MOSFET in constant-current circuit almost constant.This type of structure effectively reduces the power consumption,and meanwhile holds high current accuracy.Firstly,the PVI characteristic is analyzed and the system structure is proposed.Then the design principle of the constant-current driver circuit and high-efficiency DCDC power supply circuit with adjustable output voltage are designed.The implement of communication protocol and the control algorithm of DCDC output voltage are discussed in detail.Finally,DCDC efficiency and laser current control effect are given,and the comparison test result further reveals the efficiency advantage of the proposed design scheme.
引文
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[10] CONG Menglong,LI Li,CUI Yansong,et al.Design of high stability digital controldriving system for semiconductor laser [J].Optics and Precision Engineering,2010,18(7):1629-1636.(in Chinese)丛梦龙,李黎,崔艳松,等.控制半导体激光器的高稳定度数字化驱动电源的设计[J].光学精密工程,2010,18(7):1629-1636.
[11] LIU Pingying,DING Youlin.Design of hign-precision driving power system for semiconductor laser[J].Modern Electronic Technology,2009,32(8):166-169.(in Chinese)刘平英,丁友林.高精度半导体激光器驱动电源系统的设计[J].现代电子技术,2009,32(8):166-169.
[2] DONG Yang,CHEN Haiyan,CHEN Changyan,et al.Driving circuit design for low power 980 nm wavelength semiconductor laser[J].Modern Electronic Technology,2014,37(13):119-121.(in Chinese)董阳,陈海燕,程昌彦,等.低功率980nm波长半导体激光器驱动电路设计[J].现代电子技术,2014,37(13):119-121.
[3] ZHANG Yueling,ZHOU Guanjun.LD dirving power design for high power fiber laser pump source [J].Electro-Optic Technology Application,2014,29(2):70-74.(in Chinese)张悦玲,周冠军.大功率光纤激光器泵浦源LD驱动电源设计[J].光电技术应用,2014,29(2):70-74.
[4] LI Dong,MA Jiaju,GENG Hongwei.Design of large current pulsed constant current source for semiconductor laser[J].Technology of Measure and Control,2012,31(8):5-8.(in Chinese)李栋,马家驹,耿宏伟.半导体激光器大电流脉冲恒流源的设计[J].测控技术,2012,31(8):5-8.
[5] LU Kai,LIU Baiyu,BAI Yonglin,et al.Dirving power design for high-power semiconductor laser [J].Infrared and Laser Engineering,2012,41(06):2680-2684.(in Chinese)卢凯,刘百玉,白永林,等.大功率半导体激光器驱动电源的设计[J].红外与激光工程,2012,41(10):2680-2684.
[6] CHEN Chen,HUANG Jianqiang,LV Mo,et al.Hign-precision nanosecond driving power for Infrared quantum cascade lasers[J].Journal of Jilin University:Engineering and Technology Edition,2011,46(6):738-742.(in Chinese)陈晨,黄渐强,吕默等.高精度纳秒级红外量子级联激光器驱动电源[J].吉林大学学报:工学版,2011,41(6):738-742.
[7] LUO Liang,HU Jiachen,WANG Canyuan,et al.Design of high-precision driving power and temperature control circuit for semiconductor laser[J].Laser Technology,2017,41(2):200-204.(in Chinese)罗亮,胡佳成,王婵媛,等.高精度半导体激光器驱动电源及温控电路设计[J].激光技术,2017,41(2):200-204.
[8] HOU Qingzhi,XIONG Jijun,CAO Yanchang.Semiconductor laser source with high stability[J/OL].Electronics Optics & Control,2014,21(7):86-89.(in Chinese)侯庆志,熊继军,曹延昌.高稳定度半导体激光器电源[J/OL].电光与控制,2014,21(7):86-89.
[9] DANG Jinming,ZHAI Bing,GAO Zongli,et al.Nanosecond driver for multiple pulse-modulated Infrared quantum cascade lasers [J].Optics and Precision Engineering,2013,21(9):2209-2216.(in Chinese)党敬民,翟冰,高宗丽,等.纳秒级脉冲型群红外量子级联激光器驱动电源[J].光学精密工程,2013,21(9):2209-2216.
[10] CONG Menglong,LI Li,CUI Yansong,et al.Design of high stability digital controldriving system for semiconductor laser [J].Optics and Precision Engineering,2010,18(7):1629-1636.(in Chinese)丛梦龙,李黎,崔艳松,等.控制半导体激光器的高稳定度数字化驱动电源的设计[J].光学精密工程,2010,18(7):1629-1636.
[11] LIU Pingying,DING Youlin.Design of hign-precision driving power system for semiconductor laser[J].Modern Electronic Technology,2009,32(8):166-169.(in Chinese)刘平英,丁友林.高精度半导体激光器驱动电源系统的设计[J].现代电子技术,2009,32(8):166-169.