Emission characteristics of second-order distributed feedback semiconductor lasers

被引：4
|
作者：
Ye S. [1 ,2 ]
Qin L. [1 ]
Qi X. [1 ,2 ]
Hu Y. [1 ,2 ]
Zhang N. [1 ,2 ]
Ning Y. [1 ]
Wang L. [1 ]
机构：
[1] Key Laboratory of Excited States Processes, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun
[2] Graduate University of Chinese Academy of Sciences
来源：
Zhongguo Jiguang/Chinese Journal of Lasers | 2010年 / 37卷 / 09期
关键词：
Coupling coefficient; Duty cycle; End-emitting; Lasers; Second-order grating; Surface-emitting;
D O I：
10.3788/CJL20103709.2371
中图分类号：
学科分类号：
摘要：
Based on the modified coupled-wave theory, the emission characteristics, including threshold gain, photon density distribution in the cavity, external differential quantum efficiency, ect. for second-order distributed feedback (DFB) lasers are investigated. Numerical simulation results also show that for given device structure with wavelength of 1.55 μm, grating duty cycle has certain influence on the emission characteristics. Finally, optimal grating duty cycle of 0.43 and optimal results include uniform photon density distribution along the cavity, the side-mode suppress ratio as high as 35 dB and external differential quantum efficiency of 47% are obtained.
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页码：2371 / 2375
页数：4
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