【摘要】 本文通过计算比较了分别采用普通折射率耦合型（ＩＣ）、λ／４相移折射率耦合型（ＱＷＳ）及增益耦合型（ＧＣ）ＤＦＢ激光器作为光源部分的激光器／调制器光子集成器件的单模选择能力、调制频移及单端光输出功率等特性，在该类型集成器件的特性分析中考虑了端面反射率任意相位的影响并对此进行了统计分析．ＧＣ型器件的调制频移特性与ＩＣ及ＱＷＳ型器件基本相同，而ＧＣ型器件的单模选择能力比ＩＣ和ＱＷＳ型器件高得多，特别在ＨＲ－ＡＲ镀膜情况下，单端光输出效率大为提高，且考虑到ＧＣ型器件无需在光栅制作中引入相移带来的制作工艺上的简化，增益合型ＤＦＢ激光器／电吸收型调制器单片光子集成器件是极有前途的光通信用理想光源．更多还原

【Abstract】 Abstract In this paper,characteristics such as single-mode selectivity,chirping(modulation-induced wavelength shift)and normalized output power of photon integrated circuits(PIC) integrating distributed feedback(DFB) semiconductor lasers and electroabsorption modulators are analyzed.Characteristics of devices with conventional index-coupled(IC),quarter-wave-shifted(QWS) and gain-coupled(GC) DFB laser sections are calculated and compared.The effect of random facet phase is considered and statistic analysis is carried out.Although chirping of GC-PIC is similar to those of IC-PIC and QWS-PIC, however,the single-mode selectivity of GC-PIC is much higher than those of IC-PIC and QWS-PIC.Furthermore,in the case of HR-AR coating, which is favorite for high power operation,GC-PIC shows much higher probability of single-mode operation than IC-PIC,while QWS-PIC can not be used at all.Considering the simplification of fabrication processing of GC-DFB lasers without the formation of quarter-wave shifted gratings,the monolithically integrated GC-DFB laser/electroabsorption modulator is a very promising light transmitter for optical communications.更多还原