Grating Structure and Coupling Characteristics of Laterally-coupled Distributed Feedback Semiconductor Lasers

被引：0
|
作者：
Li R.-D. [1 ]
Zou Y.-G. [1 ]
Tian K. [1 ]
Wang R. [1 ]
Fan J. [1 ]
Lan Y.-P. [1 ]
机构：
[1] State Key Laboratory of High-power Semiconductor Laser, Changchun University of Science and Technology, Changchun
来源：
Faguang Xuebao/Chinese Journal of Luminescence | 2021年 / 42卷 / 12期
关键词：
Bragg grating; Coupling coefficient; Distributed feedback; Laterally-coupled;
D O I：
10.37188/CJL.20210314
中图分类号：
学科分类号：
摘要：
Coupling coefficient is an important parameter for evaluating the grating performance of distributed feedback(DFB) semiconductor lasers. In this paper, based on the coupled-wave theory and combined with numerical simulation, the effect of the structural parameters of the laterally-coupled surface grating on their coupling characteristics is investigated. In contrast to the laterally-coupled ridge-waveguide structure of rectangular gratings, six special lateral microstructure gratings, namely, symmetric trapezoid, misaligned trapezoid, symmetric junction, misaligned junction, bisymmetric trapezoid and bisymmetric junction, have been studied to effectively achieve the coupling coefficient regulation of gratings by changing the longitudinal inclination angle of the grating sidewalls and adjusting the optical confinement factor of the grating. The effects of structural parameters such as duty cycle, ridge width and lateral width of the grating on the coupling coefficient of the special lateral microstructure grating of ridge-waveguide were simulated and analyzed, and it was found that reasonable structural parameters can effectively mitigate the fluctuation of the coupling coefficient and help reduce the effect of process errors on the coupling coefficient. The work in this paper provides a theoretical basis for the design and preparation of subsequent grating structures. © 2021, Science Press. All right reserved.
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页码：1921 / 1927
页数：6
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