CAJ | 학술논문

采用谱分割方法和分段模型对1.5 μm 波段的超辐射发光二极管(SLD)进行了仿真.为减小分段模型的分段数目和计算时间,对文献中常采用的计算每小段平均光功率(平均光子数密度)的3种主要方法进行了对比分析,结果表明:积分平均的方法具有显著的优势.与商用器件的测试结果相比,数值计算的输出光谱和电流-输出功率曲线基本相符.对高功率SLD的数值仿真表明:在有源区长度大于1mm后,输出功率的增长出现明显的饱和现象,纵向空间烧孔(LSHB)效应限制了增加有源区长度对输出功率增长的贡献.此外,对高功率SLD,使用忽略LSHB效应的单段模型计算输出功率可产生数倍的误差,因此,采用分段模型计入LSHB效应是必要的.
채용보분할방법화분단모형대1.5 μm 파단적초복사발광이겁관(SLD)진행료방진.위감소분단모형적분단수목화계산시간,대문헌중상채용적계산매소단평균광공솔(평균광자수밀도)적3충주요방법진행료대비분석,결과표명:적분평균적방법구유현저적우세.여상용기건적측시결과상비,수치계산적수출광보화전류-수출공솔곡선기본상부.대고공솔SLD적수치방진표명:재유원구장도대우1mm후,수출공솔적증장출현명현적포화현상,종향공간소공(LSHB)효응한제료증가유원구장도대수출공솔증장적공헌.차외,대고공솔SLD,사용홀략LSHB효응적단단모형계산수출공솔가산생수배적오차,인차,채용분단모형계입LSHB효응시필요적.
The spectrum slicing technique and the subsection model were used to simulate a 1.5μm superluminescent diode(SLD).In order to reduce the subsection number in the model and the consumed time,three different average optical power(average photon density)calculation methods, which were commonly used in reference, were compared.It is found that the integral average method has remarkable superiority for SLD performance simulation.The results obtained from the simulation are compared with a commercial device,and reasonable agreement has been achieved for the optical power spectrum and P-I relationship.For high power SLDs,numerical results demonstrate that the output power begins to saturate notably when the length of the active region is beyond 1 mm.The longitudinal spatial hole burning (LSHB)effect limits the output power increasing with the length of the active region.In addition,the negligence of the LSHB effect in the single section model results in an incorrect prediction of the output power that is several times larger than it is supposed to be for the high power SLDs;therefore,it becomes necessary to adopt the subsection model and take into account the LSHB effect.