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Analysis of the time domain characteristics of tapered semiconductor lasers 被引量:1
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作者 Desheng Zeng Li Zhong +1 位作者 Suping Liu Xiaoyu Ma 《Journal of Semiconductors》 EI CAS CSCD 2020年第3期49-53,共5页
We use traveling wave coupling theory to investigate the time domain characteristics of tapered semiconductor lasers with DBR gratings.We analyze the influence of the length of second order gratings on the power and s... We use traveling wave coupling theory to investigate the time domain characteristics of tapered semiconductor lasers with DBR gratings.We analyze the influence of the length of second order gratings on the power and spectrum of output light,and optimizing the length of gratings,in order to reduce the mode competition effect in the device,and obtain the high power output light wave with good longitudinal mode characteristics. 展开更多
关键词 tapered semiconductor lasers time domain characteristics DBR gratings mode competition
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Time domain finite volume method for the transient response and natural characteristics of structural-acoustic coupling in an enclosed cavity
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作者 XUAN Lingkuan MING Pingjian +2 位作者 ZHANG Wenping JIN Guoyong GONG Jingfeng 《Chinese Journal of Acoustics》 2014年第3期212-227,共16页
A time domain finite volume method(TDFVM)based on wave theory is developed to analyze the transient response and natural characteristics of structural-acoustic coupling problems in an enclosed cavity.In the present ... A time domain finite volume method(TDFVM)based on wave theory is developed to analyze the transient response and natural characteristics of structural-acoustic coupling problems in an enclosed cavity.In the present method,the elastic dynamic equations and acoustic equation in heterogeneous medium are solved in solid domains and fluid domains respectively.The structural-acoustic coupling is implemented according to the continuity condition of the particle velocity along the normal direction and the normal traction equilibrium condition on the interface.Several numerical examples are presented to validate the effectiveness and accuracy of the present TDFVM.Then the effects of water depth on the acoustic and vibration characteristics and the natural characteristics of a structural-acoustic coupling system are analyzed.The numerical results show that the increase of water depth leads to a stronger coupling between the water and structure and the decrease of natural frequencies of coupling system,The computational cost and memory of this method are small and it can be applicable to structural-acoustic coupling problems in the heterogeneous fluid. 展开更多
关键词 time domain finite volume method for the transient response and natural characteristics of structural-acoustic coupling in an enclosed cavity
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