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1、第30卷第6期激光技术Vol.30,No.62006年12月LASERTECHNOLOGYDecember,2006文章编号:100123806(2006)0620650203半导体激光器高精度稳频输出控制系统121231袁军国,詹春,李小国,刘德明,于敦录(1.华中科技大学光电子工程系,武汉430074;2.江西科技师范学院应用物理系,南昌330046)摘要:为了在光纤干涉仪中得到光源高精度稳频输出,采用高稳定度的恒温控制以及功率稳恒控制方法,通过高信噪比的运算放大器、半导体制冷器,设计了一种激光电源驱动系统,并进行了理论分析和实验验证。其能为半导体激光器提供温度控制精度在±0
2、.01℃,制冷驱动电流可达800mA,同时使得半导体激光器输出波长控制精度在±0.1nm,驱-4-5动电流最大输出可达180mA,输出电流的稳定度为10～10。结果表明,该系统不仅结构简单,而且温度控制稳定、准确度高,可使半导体激光器的输出波长保持稳定,保证了干涉型光纤传感器的测量准确度以及在通信领域中的应用。关键词:激光器;温度控制;恒流源;PID控制器;半导体制冷器中图分类号:TN248.4文献标识码:AAccuratecontrollingsystemfortheoutputandfrequencyoflaserdiodes12121YUANJun2guo,ZHANChun
3、,LIXiao2guo,LIUDe2ming,YUDun2lu(1.DepartmentofOpto2electronicsEngineering,HuazhongUniversityofScienceandTechnology,Wuhan430074,China;2.DepartmentofCommunicationandElectron,JiangxiScience&TechnologyNormalUniversity,Nanchang330046,China)Abstract:Thechangeoftheoutputpowerandthefrequencyoftheligh
4、tsourceofanopticalfiberinterferometerseriouslyaffectstheoutputoftheinterferometer.Inordertogethighoutputaccuracyandstabilityfromtheopticalfiberinterferometer,theoperationamplifierwithhighS/N,andasemiconductorcoolerwereused.Alaserpowerdrivingsystemwasdesigned.Throughtheoreticalandexperimentala
5、nalysis,itwasprovedtoprovidelaserdiode(LD)withhighstabilityand,hightemperaturecontrollingprecisionof±0.01℃.Thecoolingdrivingcurrentcouldreach800mA.Atthesametime,itprovidescurrentcontrolwithhighstabilityandconstantcontroloveroutputpower,whichassurestheprecisionofthecontrolledwavelengthtobe±0.1
6、nm.-4-5ThemaximumLDdrivingcurrentreaches180mA,andtheoutputcurrenstabilitycouldbekeptamong10～10.Theexperimentaldataindicatethemethodisnotonlysimple,butalsohighlyaccurateandstableintermsoftemperaturecontrol.Theapplicationmaintainstheoutputwavelengthofthelaserdiodeataconstantlevelandassurestheme
7、asureaccuracyinopticalfiberinterferometersensors(OFIS)andopticalcommunication.Keywords:lasers;temperaturecontrol;constantcurrentsource;proportional2integral2differential(PID)processor;thermalelectroniccooler(TEC)随之增加,波长随温度变化的典型值为0.3nm/℃～引言[5,
