Theoretical analysis of emission characteristics of second-order distributed feedback semiconductor lasers
Theoretical analysis of emission characteristics of second-order distributed feedback semiconductor lasers
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二阶分布反馈半导体激光器发射特性的理论分析
DOI：
10.1117/12.869078
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发表时间：
2010-11
期刊：
影响因子：
--
通讯作者：
Yun Liu
中科院分区：
文献类型：
--
作者：
Nan Zhang;Lijun Wang;Yongqiang Ning;Yongsheng Hu;Li Qin;Shujuan Ye;Yun Liu
基于修正的耦合波理论，研究了二阶DFB激光器的阈值增益、腔内光子密度分布和外微分量子效率等发射特性。数值模拟结果表明，对于波长为1.55 μm的给定器件结构，二阶光栅的反馈耦合系数和表面辐射耦合系数对器件的发射特性有很大影响。通过选择不同的光栅占空比，可以改变这两个耦合系数，从而影响发射特性。出于总体考虑，选择0.43的最佳占空比。优化结果表明，器件工作时没有简并模和空间烧孔。此外，边模抑制比（SMSR）和外微分量子效率分别高达42 dB和47%。
Based on the modified coupled-wave theory, the emission characteristics, including threshold gain, photon density distribution in the cavity, and external differential quantum efficiency for second-order DFB lasers are investigated. Numerical simulation results show that for given device structure with wavelength of 1.55 μm, the feedback coupling coefficient and the surface radiation coupling coefficient of the second-order grating have great influence on the emission characteristics of the device. By choosing different duty cycles of the grating, we can change the two coupling coefficients, which affect the emission characteristics. For an overall consideration, an optimal duty cycle of 0.43 is chosen. The optimized results show that the device works without degeneracy modes and spatial burning hole. Besides, the side-mode suppress ratio (SMSR) and external differential quantum efficiency reach as high as 42 dB and 47%, respectively.
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DOI：
10.1117/12.569039
发表时间：
2004-12
期刊：
--
影响因子：
--
作者：
H. Wenzel;A. Klehr;M. Braun;F. Bugge;G. Erbert;J. Fricke;A. Knauer;P. Ressel;B. Sumpf;M. Weyers;G. Traenkle
通讯作者：
H. Wenzel;A. Klehr;M. Braun;F. Bugge;G. Erbert;J. Fricke;A. Knauer;P. Ressel;B. Sumpf;M. Weyers;G. Traenkle
影响因子：
2.5
作者：
W. Tsang;Ming C. Wu;Young-Kai Chen;F. Choa;R. Logan;S. Chu;A. Sergent;P. Magill;K. Reichmann;C. Burrus
通讯作者：
W. Tsang;Ming C. Wu;Young-Kai Chen;F. Choa;R. Logan;S. Chu;A. Sergent;P. Magill;K. Reichmann;C. Burrus
影响因子：
2.5
作者：
S. Yu;R. Plumb;L. Zhang;M. Nowell;J. Carroll
通讯作者：
S. Yu;R. Plumb;L. Zhang;M. Nowell;J. Carroll
影响因子：
2.5
作者：
A. M. Shams-Zadeh-Amiri;Jin Hong;Xun Li;Wei-Ping Huang
通讯作者：
A. M. Shams-Zadeh-Amiri;Jin Hong;Xun Li;Wei-Ping Huang
影响因子：
2.5
作者：
X. Li;S. Yu
通讯作者：
X. Li;S. Yu