【7月14日】数学学术讲座
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作者：
发布时间：2021-07-03
报告题目: A Comprehensive Modeling Strategy of the Dynamics in Mid-Infrared Quantum-Cascade Lasers
报告人: 白静（Bai Jing） 博士
报告地点：云南财经大学北院卓远楼305（统计与数学学院会议室）
报告时间：2017年7月14日（星期五）16：00-17:00
报告主持人：王汉权教授 统计与数学学院副院长
报告摘要：
Since the first demonstration in 1994, quantum-cascade lasers (QCLs), a type of nanoscale semiconductor lasers, have become one of the most important solid-state mid-infrared (MIR) coherent light sources for various applications in environment sensing, medical diagnosis, and defense and free-space communication. The dynamics analysis and stable pulse progression of MIR QCLs are crucial for QCLs to have reliable performance in these applications. An explicit description of dynamics of QCLs is inevitably complicated when compared to conventional lasers due to the unique combination of ultrafast carrier scatterings and gain recovery, giant nonlinearities and dispersion effects in a QCL medium.
In this talk, we will present a comprehensive modeling strategy for dynamic behaviors in MIR QCLs. The model is built based on the Maxwell-Bloch formulism accounting for all the aforementioned physical phenomena in a typical QCL medium. The QCL pulse evolution is numerically simulated by the finite difference method with prior nondimensionalization treatment, which is necessary for the convergence of solutions. Results obtained bring insights into the individual effect from each physical phenomenon on the QCL pulse progression as well as the interplay among various phenomena. In addition, we investigated the influence of cavity configurations on QCL dynamic behaviors by applying the model on two most important types of QCL cavities, i.e., the ring cavity and the Fabry-Perot cavity. Outcomes from this research could provide design guidance on the lasing pulse shortening and spectrum bandwidth control of MIR QCLs for various applications.
报告人简介：
白静博士系美国明尼苏达大学德卢斯（Duluth）分校电气工程系副教授与研究生部主任。1996年毕业于清华大学机械工程系， 2003年在美国佐治亚理工学院获得电气工程专业硕士，2007年在美国佐治亚理工学院获得计算机工程专业博士。研究领域主要包括纳米级的光电子设备与光电池设备的动力学行为以及光电技术在生物医学中的应用。白静博士是美国IEEE、美国光学学会以及美国物理学会等学术组织会员。
报告人: 白静（Bai Jing） 博士
报告地点：云南财经大学北院卓远楼305（统计与数学学院会议室）
报告时间：2017年7月14日（星期五）16：00-17:00
报告主持人：王汉权教授 统计与数学学院副院长
报告摘要：
Since the first demonstration in 1994, quantum-cascade lasers (QCLs), a type of nanoscale semiconductor lasers, have become one of the most important solid-state mid-infrared (MIR) coherent light sources for various applications in environment sensing, medical diagnosis, and defense and free-space communication. The dynamics analysis and stable pulse progression of MIR QCLs are crucial for QCLs to have reliable performance in these applications. An explicit description of dynamics of QCLs is inevitably complicated when compared to conventional lasers due to the unique combination of ultrafast carrier scatterings and gain recovery, giant nonlinearities and dispersion effects in a QCL medium.
In this talk, we will present a comprehensive modeling strategy for dynamic behaviors in MIR QCLs. The model is built based on the Maxwell-Bloch formulism accounting for all the aforementioned physical phenomena in a typical QCL medium. The QCL pulse evolution is numerically simulated by the finite difference method with prior nondimensionalization treatment, which is necessary for the convergence of solutions. Results obtained bring insights into the individual effect from each physical phenomenon on the QCL pulse progression as well as the interplay among various phenomena. In addition, we investigated the influence of cavity configurations on QCL dynamic behaviors by applying the model on two most important types of QCL cavities, i.e., the ring cavity and the Fabry-Perot cavity. Outcomes from this research could provide design guidance on the lasing pulse shortening and spectrum bandwidth control of MIR QCLs for various applications.
报告人简介：
白静博士系美国明尼苏达大学德卢斯（Duluth）分校电气工程系副教授与研究生部主任。1996年毕业于清华大学机械工程系， 2003年在美国佐治亚理工学院获得电气工程专业硕士，2007年在美国佐治亚理工学院获得计算机工程专业博士。研究领域主要包括纳米级的光电子设备与光电池设备的动力学行为以及光电技术在生物医学中的应用。白静博士是美国IEEE、美国光学学会以及美国物理学会等学术组织会员。
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