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  • 会议论文 [8]
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  • 2010 [8]
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Characteristics of active mode-locked fiber ring laser based on semiconductor optical amplifier 会议论文  OAI收割
2008 asia-pacific optical communication, hangzhou, 2008
Shuangyi Yan; Jianguo Zhang; Wei Zhao
收藏  |  浏览/下载：85/6  |  提交时间：2010/01/18
Theoretical analysis of emission characteristics of second-order distributed feedback semiconductor lasers (EI CONFERENCE) 会议论文  OAI收割
Semiconductor Lasers and Applications IV, October 18, 2010 - October 19, 2010, Beijing, China
作者:  Liu Y.;  Liu Y.;  Qin L.;  Liu Y.;  Wang L.
收藏  |  浏览/下载：13/0  |  提交时间：2013/03/25
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 m  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. 2010 SPIE.  
The novel facet coating technology for 808nm semiconductor laser (EI CONFERENCE) 会议论文  OAI收割
2010 Academic Symposium on Optoelectronics and Microelectronics Technology and 10th Chinese-Russian Symposium on Laser Physics and Laser Technology, RCSLPLT/ASOT 2010, July 28, 2010 - August 1, 2010, Harbin, China
作者:  Liu Y.;  Qin L.;  Li Z.;  Li Z.;  Wang L.
收藏  |  浏览/下载：15/0  |  提交时间：2013/03/25
A novel facet coating technology is presented by studying catastrophic optical mirror damage mechanism of semiconductor laser. In this technology  semiconductor laser are cleaved in the air  and the surface oxide layer is removed with a low energy ion source  flowed immediately by coating the facet with thin ZnSe layer of 20 nm. The function of this layer is to protect semiconductor laser facet  and prevent impurity particles diffusing to the facet. Finally the facet is coated with oxidative optical film. The test results show that the output power of the semiconductor laser with the ZnSe coated layer is 13% higher than that of the Si coated layer  and 47% higher than that of the oxide coated film. The device coated oxide film is damaged when current is 4.5 A  and the device coated with Si layer is damaged when current is 5.5 A  the final failed device is coated with ZnSe layer. In conclusion  the method of coating ZnSe layer on the semiconductor laser facet can prevent effectively the catastrophic optical mirror damage  and increase the output power of semiconductor lasers. 2010 IEEE.  
Theoretical Analysis of Emission Characteristics of Second-order Distributed Feedback Semiconductor Lasers 会议论文  OAI收割
2010
作者:  Liu Y.;  Liu Y.;  Liu Y.;  Qin L.
收藏  |  浏览/下载：11/0  |  提交时间：2013/03/28
A simple wavelength-locking scheme of a tunable three-electrode distributed Bragg reflector laser for multiple ITU channel application in C band 会议论文  OAI收割
conference on semiconductor lasers and applications iv, beijing, peoples r china, oct 18-19, 2010
Ye N (Ye Nan); Liu Y (Liu Yang); Zhao LJ (Zhao Ling-Juan)
收藏  |  浏览/下载：54/7  |  提交时间：2011/07/15
Mode Coupling and Directional Emission in Mirocylinder Lasers 会议论文  OAI收割
22nd ieee international semiconductor laser conference, kyoto, japan, sep 26-30, 2010
Huang YZ (Huang Yong-Zhen); Wang SJ (Wang Shi-Jiang); Yang YD (Yang Yue-De); Lin JD (Lin Jian-Dong); Che KJ (Che Kai-Jun); Xiao JL (Xiao Jin-Long); Du Y (Du Yun)
收藏  |  浏览/下载：76/8  |  提交时间：2011/07/15
High-speed analog DFB laser module operated in direct modulation for Ku-band 会议论文  OAI收割
conference on semiconductor lasers and applications iv, beijing, peoples r china, oct 18-19, 2010
Liu Y (Liu Yu); Man JW (Man Jiang Wei); Han W (Han Wei); Wang X (Wang Xin); Yuan HQ (Yuan Hai Qing); Zhu HL (Zhu Hong Liang); Xie LA (Xie Liang); Zhu NH (Zhu Ning Hua)
收藏  |  浏览/下载：63/4  |  提交时间：2011/07/15
High brightness InAs/GaAs quantum dot tapered laser at 1.3 mu m with high temperature stability 会议论文  OAI收割
conference on semiconductor lasers and applications iv, beijing, peoples r china, oct 18-19, 2010
Cao YL (Cao Yu-Lian); Xu PF (Xu Peng-fei); Ji HM (Ji Hai-Ming); Yang T (Yang Tao); Chen LH (Chen Liang-Hui)
收藏  |  浏览/下载：53/4  |  提交时间：2011/07/14