Sagnac干涉仪与光纤环形激光器_潘炜

199Vol.19No.920009COLLEGEPHYSICSSep.2000¹:1999-06-07º:(97-21);»:(1959)),,,,,.Sagnac¹º潘炜1,2,张晓霞1,2,罗斌1,吕鸿昌1,陈建国2»(1.,610031;2.,610064):,Sagnac,,(FOG).:Sagnac;;;:TN248.4;O436:A:1000-0712(2000)09-0035-031SagnacG.Sagnac1910,1,(),,.,,..[1,2],,.1976,,.,FOG(Fiber-1Sagnacopticgyroscope).,,,,,,,[3].22.1,,,,2.,,2.,,,.Sagnac,,.,(LD),,,,.2.2,c,8,R,v.8=0,,,t1=2PRPc(1)8X0,.,t1,s1=vt1,s1t2=s1Pc=2PRvPc2(2)$t=(t1+t2)-(t1-t2)=4P8R2c2=4Ac28(3),A=PR2.,,,,.s1t2,s2,s2=vt2=2PRv2Pc2,s2t3=s2Pc=2PRv2Pc3,t1+t2+t3=2PRc1+vc+v2c2(4),t1-t2-t3=2PRc1-vc-v2c2(5),(Zeno),t+sum=2PRc1+E]n=1vcn=2PRcE]n=0vcn=2PRc11-vPc(6),t-sum=2PRc1-E]n=1vcn=2PRc2-11-vPc(7)$tsum=t+sum-t-sum=4PRvc2(1-vPc)=4Ac2(1-vPc)8(8),vnc,(3),.3FOG.L=m2PR(m),,L=qK=qcPf(9)q,f,q,,$LPL=$fPf(10),(3),$f=4AKL8(11),,;,.He-Ne,[4].,FOG,.,(8),mFOG$U=2P$tsumT=8PAKc8=4PLRKc8(12),T=KPc,FOG.3[5],,..,P$U33619P=P0cos2($UP2)=P20(1+cos$U)(13),P0$U=0,,,,,,.,,FOG,FOG.,FOG,LiNbO3,.80,FOG,.,1kg,40g,0.1bPh.,(0.015bPh),FOG,0.0016bPh,FOG,.90,FOG,2000.,,,FOG.:[1],,.[J].,1999,20(1):69~71.[2]LuHongchang,LuoBin,PanWei,etal.Tuningoutputpowervaryingthesplittingratioofacouplerfromafiberringsemiconductor[J].Appl.Opt.,1999,38(9):1764~1766.[3],.[J].,1998,17(11):31~36.[4]BilgerHR,StedmanGE,PoultonMP,etal.Ringlaserforprecisionmeasurementofnonreciprocalphenomena[J].IEEETrans.Instru.Meas.,1993,43(3):407~411.[5].[M].:,1998.330.SagnacinterferometerandfiberringlaserPANWei1,2,ZHANGXiao-xia1,2,LUOBin1,LUHong-chang1,CHENJian-guo2(1.DepartmentofComputersandCommunicationEngineering,SouthwestJiaotongUniversity,Chengdu,Sichuan,610031,China;2.DepartmentofOptoelectronics,SichuanUniversity,Chengdu,Sichuan,610064,China)Abstract:Accordingtothetheoryofcoherentoptics,thebasicprincipleofthefiberringlaserisanalysedanddescribed,takingthefiberSagnacinterferometerasanexample.Atthesametime,theap-plicationanddevelopmentprospectforthefiberringlaserandfiber-opticgyroscope(FOG)aregiven.Keywords:Sagnacinterferometer;fiberringlaser;fiber-opticgyroscope;beatfrequency379:Sagnac