期刊
IEEE JOURNAL OF QUANTUM ELECTRONICS
卷 36, 期 6, 页码 633-640出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/3.845716
关键词
distributed-feedback lasers; interference; modeling; semiconductor lasers; spontaneous emission; transfer function matrices; wavefunctions
Two different treatments of spontaneous emission in distribured-feedback (DFB) lasers were found in the literature, but adequate explanations for the different treatments were not found. Using an approach that allows comparison of the two different treatments of spontaneous emission, we show that the different treatments can lead to different spectral predictions. The difference in spectral predictions is negligible in Fabry-Perot lasers and index-coupled DFB lasers, However, in truncated-well gain-coupled DFB lasers, the difference between the two treatments is noticeable, and one treatment is markedly better at fitting to data. The treatment that best fits the data is also the treatment that makes sense quantum-mechanically.
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