《光纤通信技术》第3章Optical Transmitters.pptx

Fiber-OpticCommunicationTechnologyChapter3OpticalTransmitters

2025/5/14OE,HUST2Chapter3.OpticalTransmittersIntroductionBasicconceptsSemiconductorlasers(LaserDiode)LaserCharacteristicsLight-EmittingDiodes(LED)TransmitterDesign

2025/5/14OE,HUST3Opticaltransmitter：光发射机LED:发光二极管LD：激光二极管Spontaneousemission：自发辐射Stimulatedemission：受激发射Stimulatedabsorption：受激吸收Boltzmanstatistics：玻尔兹曼统计分布Thermalequilibrium：热平衡Spectraldensity：光谱密度Populationinversion：粒子数反转Fermi-Diracdistribution：费米狄拉克分布Conductionband：导带Valenceband：价带Forward-biased：正向偏置Junction：结Fermilevel：费米能级Bandgap：带隙Heavydoping：重掺杂Homojunction：同质结Heterojunction：异质结Doubleheterostructure：双异质结Electron-holerecombination：电子空穴复合Claddinglayer：包层Augerrecombination：俄歇复合Kineticenergy：动能Nonradiativerecombination：非辐射复合Surfacerecombination：表面复合Internalquantumefficiency：内量子效率Directbandgap：直接带隙Indirectbandgap：非直接带隙Carrierlifetime：载流子寿命Latticeconstant：晶格常数Ternaryandquaternarycompound：三元系和四元系化合物Substrate:衬底LPE：液相外延VPE：汽相外延MBE：分子束外延MOCVD：改进的化学汽相沉积MQW:多量子阱

2025/5/14OE,HUST4Electron-holepairs电子空穴对Externalquantumefficiency外量子效率Fresneltransmissivity菲涅耳透射率Lambertiansource朗伯光源Power-conversionefficiency功率转换效率Wall-plugefficiency电光转换效率Responsivity响应度Rateequation速率方程Surface-emitting表面发射Beamdivergence光束发散Edge-emitting边发射Resonantcavity谐振腔Gaincoefficient增益系数Differentialgain微分增益Laserthreshold激光阈值Thresholdcurrent阈值电流Groupindex群折射率Externalcavity外腔Broadarea宽面Stripegeometry条形Diffusion扩散Index-guided折射率导引Ridgewaveguidelaser脊波导激光器Buriedheterostructure掩埋异质结Lateral侧向Transverse横向SLM:SingleLongitudinalmode单纵模MSR:Modesuppressionratio模式抑制比DFB:DistributedFeedback分布式反馈Braggdiffraction布拉格衍射Braggcondition布拉格条件DBR:distributedBraggreflector分布式布拉格反射器Phase-shiftedDFBlaser相移DFB激光器Gaincoupled增益耦合Coupledcavity耦合腔

2025/5/14OE,HUST5Superstructuregrating超结构光栅VCSEL:verticalcavitysurface-emittinglasers垂直腔表面发射激光器Photonlifetime光子寿命Spontaneous-emis