灵敏度与误码率关系分析及其快速测试

灵敏度与误码率关系分析及其快速测试,,(武汉华工正源光子技术有限公司,湖北武汉430223):文章重点分析了应用于光模块灵敏度外推法测试中的误码率(BER)与灵敏度成线性关系的理论依据;并通过实验验证了这一线性关系试验结果显示,百兆千兆光收发合一模块的灵敏度与lg[-lg(BER)]的相关系数分别为0.999790.99906,线性度良好;并结合误码率的可靠性测量,提出了优化的灵敏度外推法测试方案:误码率;灵敏度;相关系数;外推法:TN929.1:A:1005-8788(2010)06-0017-03RelationshipbetweenbiterrorrateandsensitivityanditsfasttestsZhuMengxia,FanZhigang,LiangGuotao(WuhanHuagongGenuineOpticsTechnologyCo.,Ltd.,Wuhan430223,China)Abstract:ThispaperanalyzesthetheoreticalbasisforthelinearrelationshipbetweentheBitErrorRate(BER)inopticalmod-ulesensitivitytestsbyextrapolationandsensitivity,whichisverifiedinexperiments.Thetestresultsindicatethatthecorrela-tioncoefficientsofthesensitivitiesof155Mbit/sand1.25Gbit/sopticaltransceivermodulesandlg[-lg(BER)]are0.99979and0.99906respectively,presentingagoodlinearity.Furthermore,itpresentsanoptimizedsensitivitymeasurementschemebyextrapolationmethod.Keywords:BER;sensitivity;correlationcoefficient;extrapolationmethod0,(BER),,,,,,,,,,,,,1,,BER=m/n,,mn[1]BERU12PQexp-Q22,(1),Q2=SNR[2],SNR(Sen)SNR[3]:Sen=1000inSNR(re+1)2Q(re-1),(2),in;re;Q1E=1000in(re+1)2Q(re-1),Sen#E=SNR,(1),BER=12P#E#Senexp-E#Sen2(3)E#Sen,(3)1E#Sen1,,()10lg,lg[-lg(BER)],210-5~10-14,lg[-lg(BER)]E#Sen:2010-06-27:(1984-),,,,1720106162STUDYONOPTICALCOMMUNICATIONS2010.12(Sum.No.162)图1误码率与E#Sen的关系曲线,,lg[-lg(BER)]E#Sen(dBm),,R=0.99989,R1,图2lg[-lg(BER)]和E#Sen(dBm)的关系曲线及其线性拟合曲线,(3)lg:-lg(BER)=0.2171E#Sen+0.5lg(E#Sen)+0.3391(4)3(4)0.2171(E#Sen)0.5lg(E#Sen),0.2171E#Sen0.5lg(E#Sen),E#Sen12.5~17.5dBm,E#Sen=17.78~56.23,4~120.5lg(E#Sen),图3式(4)中的0.2171(E#Sen)与0.5lg(E#Sen)的比较lg,lg[-lg(BER)]=0.2171E10SendBm-1.133,(5)lg[-lg(BER)]E#SenE,,E,E,,lg[-lg(BER)]Sen2(SmallForm-factorPluggables,SFP),,,100,10%4,,,,,,,,,图4测试原理框图56155Mbit/s1.25Gbit/s,lg[-lg(BER)]0.999790.99906,,lg[-lg(BER)]图5155Mbit/s光模块灵敏度与误码率曲线1820106162图61.25Gbit/s光模块灵敏度与误码率曲线3,lg[-lg(BER)]Sen,,,,/1/,,,,,,,B,D,BER0,T[4],T\-ln(1-D)BER0*B(6)BER0,,,,(1)3,,,3()lg[-lg(BER)],,,,,155Mbit/s,10-10,3:5@10-6~10-65@10-7~10-75@10-8~5@10-9,,775~15577.5~15.5,,10%1000.6456.5s,1T,T,(6)3,10-10(2),,1,155Mbit/s,10-10,10-9,,10-9,10-10,10-910-10,,10-9,10-104lg[-lg(BER)],,,:(1),,T;(2),,:[1],,.[M].:,2007.[2].)))():[J].,2003,(7):47-51.[3]MAXIMHigh-Frequency/FiberCommunicationsGroup.MAXIMApplicationNoteHFAN-3.0.0--AccuratelyEstimatingOpticalReceiverSensitivity[OL].[4],.DWDM[J].,2001,(6):30-34.19: