We experimentally demonstrate the generation of highly coherent Type-II micro-combs based on a microresonator nested in a fiber cavity loop, known as the filter-driven four wave mixing （FD-FWM） laser scheme. In this...We experimentally demonstrate the generation of highly coherent Type-II micro-combs based on a microresonator nested in a fiber cavity loop, known as the filter-driven four wave mixing （FD-FWM） laser scheme. In this system, the frequency spacing of the comb can be adjusted to integer multiples of the free-spectral range （FSR） of the nested mlcro-resonator by properly tuning the fiber cavity length. Sub-comb lines with single FSR spacing around the primary comb lines can be generated. Such a spectral emission is known as a ＂Type-II comb＂. Our system achieves a fully coherent output. This behavior is verified by numerical simulations. This study represents an important step forward in controlling and manipulating the dynamics of an FD-FWM laser.展开更多
对储能锂离子电池荷电状态(state of charge,SOC)的准确估计,能保障储能锂电池系统安全稳定运行。针对储能锂电池等效电路模型参数不准确以及储能复杂环境噪声不确定的问题,基于戴维南等效电路模型,在实际测得的间隔恒流放电数据基础上...对储能锂离子电池荷电状态(state of charge,SOC)的准确估计,能保障储能锂电池系统安全稳定运行。针对储能锂电池等效电路模型参数不准确以及储能复杂环境噪声不确定的问题,基于戴维南等效电路模型,在实际测得的间隔恒流放电数据基础上利用带遗忘因子的递推最小二乘法进行等效电路参数辨识,将辨识后参数计算得到的电压与试验电压进行比较分析,验证所辨识模型的优劣并获取模型最优参数,在此基础上,提出一种基于无迹卡尔曼滤波算法对电池SOC进行准确估计。将所提算法与扩展卡尔曼滤波算法和安培小时积分法进行比较,并分析不同初始SOC对估计结果的影响。结果表明,所提方法在不同初始SOC条件下均可快速收敛并准确估计SOC,在初始SOC与模型参数无误差的条件下,估计精度高达99.2%。展开更多
基金Engineering and Physical Sciences Research Council(EPSRC)(EP/M013294/1)MC REA(630833,327627)+3 种基金Horizon 2020 Framework Programme(H2020)(725046)CRC,Natural Sciences and Engineering Research Council of Canada(NSERC)(074-U 01)MEIE,the ITMO and its Professorship Program1000 Talents Sichuan Program,China
文摘We experimentally demonstrate the generation of highly coherent Type-II micro-combs based on a microresonator nested in a fiber cavity loop, known as the filter-driven four wave mixing （FD-FWM） laser scheme. In this system, the frequency spacing of the comb can be adjusted to integer multiples of the free-spectral range （FSR） of the nested mlcro-resonator by properly tuning the fiber cavity length. Sub-comb lines with single FSR spacing around the primary comb lines can be generated. Such a spectral emission is known as a ＂Type-II comb＂. Our system achieves a fully coherent output. This behavior is verified by numerical simulations. This study represents an important step forward in controlling and manipulating the dynamics of an FD-FWM laser.
文摘对储能锂离子电池荷电状态(state of charge,SOC)的准确估计,能保障储能锂电池系统安全稳定运行。针对储能锂电池等效电路模型参数不准确以及储能复杂环境噪声不确定的问题,基于戴维南等效电路模型,在实际测得的间隔恒流放电数据基础上利用带遗忘因子的递推最小二乘法进行等效电路参数辨识,将辨识后参数计算得到的电压与试验电压进行比较分析,验证所辨识模型的优劣并获取模型最优参数,在此基础上,提出一种基于无迹卡尔曼滤波算法对电池SOC进行准确估计。将所提算法与扩展卡尔曼滤波算法和安培小时积分法进行比较,并分析不同初始SOC对估计结果的影响。结果表明,所提方法在不同初始SOC条件下均可快速收敛并准确估计SOC,在初始SOC与模型参数无误差的条件下,估计精度高达99.2%。
