LD泵浦Nd-YAG微片激光器

219973OPTICALTECHNOLOGYNo.2March1997LDNd:YAG陈　艳　赵　洋(,100084):LDNd:YAG,,,LDNd:YAGLDNd:YAG,LDNd:YAG:LD,Nd:YAG,,LD-PumpedNd:YAGMicrochipLasersChenYanZhaoYang(TsinghuaUniversity,Beijing100084)Abstract:Comparedwithdiodelasers,LD-pumpedNd:YAGmicrochiplasers,ineachofwhichtheNd:YAGcrystalitselfformstheresonancecavity,havenarrowerfrequencylinewidth,betterbeamqualityandlongercoherentlength,meanwhiletheyareremarkablysimpleandcompact.SoLD-pumpedNd:YAGmicrochiplasersarepromisinglasersourcestosubstitutefordiodelasersinsomemeasure-mentfields.Now,researchersfocustheirattentionsonachievingsingle-frequency,single-modecontin-uousoutputandlinearfrequencymodulationcharacteristics.Inthisarticle,wepresentasummaryonLD-pumpedNd:YAGmicrochipormicrocavitylasers,includingrecentdevelopments,achievementsandapplications.Especially,webriefsomenewmethodsandtechniquesonfrequencymodulationofsuchlasers.Keywords:LD-pumped,Nd:YAG,microchiplaser,frequencymodulation.,,LDNd:YAGNd:YAG(,YAGY3Al5O12),Nd3+Nd3+525nm585nm750nm810nm870nm,30nm,750nm810nmNd:YAG0.9Lm1.06Lm1.3Lm1.4LmLDNd:YAG[1],,,,LDNd:YAG,,,LD,Nd:YAG,LDLDNd:YAG:;Nd:YAGNd:YAG,Nd:YAG480Nd:YAG,Nd:YAGLDNd:YAGNd:YAG,Nd:YAG,Nd:YAG(1mm),,;YAGNd3+,1wt%,19891.06Lm1.3LmNd:YAG[2]730Lm,1mm1mm,Nd:YAGNd3+1.1wt%1.06Lm99.9%,,1.06Lm99.7%,20mW0.809LmGaAlAs1.06LmNd:YAG,30Lm,,,20mrad,1.064LmNd:YAG[3]1Nd:YAG0.65mm1.0mm2.0mm(0.65mm)PZTNd:YAG,,Nd:YAG,2030mW,12mWPZT-1000V+1000V,30.3MHz/V,PZTfm080kHz80kHzfm1.0MHz,1.5MHz/V,fm1MHz,13.2MHz/VPZT25MHz11990,1.3LmLDNd:YAG[4]2Nd:YAG53mm0.7mm,,PZT,1.57mm,95GHz100mW,10mWPZT1000V,120MHz/V,120GHz1991,LDNd:YAG1.3Lm,F-P,,5MHz,88kHz21992,LDNd:YAG[5],,,,52:LDNd:YAG1.32LmNd:YAG,1mm,1mm1mm(LD10mV,8mW):(Hz)110100100010000(MHz/mW)18.7511.635.250.6340.070,,,1.32LmLDNd:YAG[6]Nd:YAG1mm,500mW,10mW5kHz,250kHz(15s)MHz(h),0.1mW10-3,LDNd:YAG,14Hz(15s)1992,AT&T1.06LmLDNd:YCeAG[7],Nd3+3%Nd3+Nd:YAGCe,LDNd3+,,540Lm,LD0.809Lm,T=2243mW250mW,45mWNd:YAG501.2nm/,60nm(180GHz),10MHz(0.5s)TEM00,H=13mrad,H=14mrad1993,LDNd:YAG[8]Nd:YAG0.5mm,Nd3+1.8wt%810nm,1.064Lm100mW,10%10mW33Nd:YAG,,,LiTaO3-1kV+1kV,14MHz/V,30GHzdc1.3GHz1994,AT&T1.3LmLDNd:YAG[9]Nd:YAG,Nd3+4.24.5%450Lm,0.81Lm1WLD120mW,LD210mW10903.6GHz/170GHz(1nm)45%,,1.319Lm6199731.338Lm,1994,1.4LmLDNd:YAG[10]1.1%Nd3+:YAG,1mm808nm,,1.5W,50mW351.414Lm1.431Lm1.444Lm,1.44Lm,210Lm200GHz;320Lm,100GHz()LDLm[11,12],1994,100Lm,1.1%Nd3+:YAG,1.06Lm,,LDNd:YAG,,,,19941995,LDNd:YAG[13,14]42525100mm3Nd:YAG,300Lm(L),275GHzfc=f1-f2=qc/2n2L-qc/2n1L=(qc/2L)(n1-n2)/n1n2,n1n2f1f2,q(f1f2,q)n1-n21.510-7fc1.06Lm,43MHz(7m);1.3Lm,155MHz(2m),30138.85Hz,4,LD,LDNd:YAG,,1..:,19932ZayhowskiJ.J.etal.SinglefrequencymicrochipNdlasers.Opti.Lett.,1989,14:24263ZayhowskiJ.J.etal.Frequency-modulatedNd:YAGmi-crochiplasers.Opt.Lett.,1989,14:6186204F.Zhou,A.Z.Ferguson.Tunablesinglefrequencyopera-tionofadiodelaserpumpedNd:YAGmicrocipat1.3Lm.Electron.Lett.,1990,26(7):4904915ZayhowskiJ.J.etal.Frequencytuningofmicrochiplasersusingpump-powermodulation.IEEEJ.ofQuan-tumElectronics,1992,28(4):111811216ZayhowskiJ.J.etal.Phaselockingof1.32Lmmicrochiplasersthroughtheuseofpump-diodemodulation.Opt.Lett.,1992,17(9):649651(下转第38页)72:LDNd:YAG,e,Q(x,y),Q3(x,y),c1c2,5,,Ig,c1(e-e)+(PSRQ)5,,;,Eb,,,,,,,,Q(x,y),Q(x,y)ûaM-bûûrûûaM+bû,ûrûûaM+bûûrûûaM-bû,,,,1.Q(x,y),,,,2.,ûaM-bû,,Airy,ûrûûaM+bû,Q(x,y),,,353.,e,,1,..,1994,108(4):21272PhilipJ.Peters.Apertureshaping-Atechniqueforthecontrolofthespatialdistributionofdiffractedenergy.PROC.SPIE,1977,107:63693AlanW.Greynolds.Formulasforestimatingstray-radia-tionlevelsinwell-baffledopticalsystems.PROC.SPIE,1980,257:39494..,1977,(5):1116　　(上接第7页)7P.Gavrilovicetal.Temperature-tunerble,singlefrequen-cymicrocavitylasersfabricatedfromflux-grownYCaAG:Nd.Appl.Phys.Lett.,1992,60(14):165216548ZayhowskiJ.J.etal.Diode-pumpedcomposite-cavityelectroopticallytunedmicrochiplaser.IEEETech.Lett.,1993,5(10):115311559P.Gavrilovicetal.High-power,single-frequencydiode-pumpNd:YAGmicrocavitylasersat1.3Lm.Appl.Phys.Lett.,1994,65(13):1620162210N.P.Schmittetal.TunableLaser-Diode-pumpedNd:YAGmicrocrystallasersat1.4Lm.IEEEPhoto.Tech.Lett.,1994,6(8):93093211.62.5mWLDNd:YAG.,1994,A21:5612.LDNd:YAG.,1994,A21:89213CzarskeJ.W.etal.Heterodyneinterferometerusinganoveltwo-frequencyNd:YAGLaser.Electro.Lett.,1994,30(12):97097114CzarskeJ.W.etal.BirefringentNd:YAGmicrochiplaserusedinheterodynevibrometry.Opt.Comm.,1995,114:2232293819973