数字电阻器设置运行功率的激光驱动程序

摘要：将运算放大器和数字电位器添加到一个标准的激光驱动电路产生的变化是电位器的值的线性函数的激光的功率设置点温度，生成当前光电二极管响应的驱动程序。

Maxim>AppNotes>DigitalPotentiometersOptoelectronicsKeywords:laserdrivers,digitalresistors,opamps,photodiodesMar31,2011APPLICATIONNOTE4557DigitalResistorSetsOperatingPowerforLaserDriverBy:JamesHorsteAbstract:Addinganopampandadigitalpotentiometertoastandardlaser-drivercircuitproducesadriverthatvariesthelaser'spower-setpointinresponsetotemperature,generatingaphotodiodecurrentthatisalinearfunctionofthepotentiometervalue.AsimilarversionofthisarticleappearedintheMarch15,2007issueofEDmagazine.TheMAX3740VCSELlaserdriverandDS1859dual,temperature-controlleddigitalresistorarepopularchoicesforSFPandSFFfiber-opticsystems,duetotheirsm