5篇
您的检索式：作者名="Wenchuan Yan"
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| 1 | Optimal design of Er/Yb co-doped fiber amplifiers with an Yb-band fiber Bragg grating显示文摘In this paper, Er/Yb co-doped fiber amplifiers(EYDFAs) with an Yb-band fiber Bragg grating(FBG) at the pump end to improve the performance of the amplifier is systematically studied. The influence of the reflectivity and center wavelength of the FBG along with the gain-fiber length on the performance of an EYDFA are numerically analyzed. The results show that the wavelength of the FBG has critical influence on the efficiency of the EYDFA,whereas the requirement to its reflectivity is relaxed. It is an effective and promising way to improve the efficiency of a high-power pumped EYDFA by introducing a suitable Yb-band FBG at the pump end. Based on the analysis of the underlying principles, suggestions for the practical design and possible further improvement strategies are also proposed. | Qun Han Wenchuan Yan Yunzhi Yao Yaofei Chen Tiegen Liu | 2016 | Photonics Research2016，4，2： | 3 |
| 2 | Fiber loop ring-down cavity integrated U-bent single-mode-fiber for magnetic field sensing显示文摘A novel magnetic field sensing system based on the fiber loop ring-down technique is proposed in this paper. In the fiber loop, a U-bent single-mode-fiber structure coated with magnetic fluid(MF) serves as the sensing head, and an erbium-doped fiber amplifier(EDFA) is introduced to compensate for the intrinsic loss of the cavity. The ring-down time of the system varies with the change of applied magnetic field due to the tunable absorption coefficient and refractive index of the MF. Therefore, measurement of the magnetic field can be realized by monitoring the ringdown time. The experimental results show that the performance of the system is extremely dependent on the interrogation wavelength, because both the gain of the EDFA and the loss of the sensing head are wavelength dependent.We found that at the optimal wavelength, the ratio of the gain to loss attained its maximum. The sensing system was experimentally demonstrated and a sensitivity of-0.5951 μs∕Oe was achieved. | Yaofei Chen Tiegen Liu Qun Han Wenchuan Yan Lin Yu | 2016 | Photonics Research2016，4，6： | 3 |
| 3 | Lake level changes documented by sediment properties and diatom of Hulun Lake, China since the late Glacial显示文摘 | Bin Xue Wenchuan Qu Sumin Wang Yan Ma M. D. Dickman | 2003 | Hydrobiologia (-)2003，，1： | 1 |
| 4 | Lake level change documented by sediment properties and diatom of Hulun Lake:China since the late glacial显示文摘 | Bin Xue Wenchuan Qu Sumin Wang Yan Ma and Dickman M D | 2003 | Hydrobiologia2003，498，1： | 1 |
| 5 | Integrated Distribution Management System:Architecture,Functions,and Application in China显示文摘As massive distributed energy resources(DERs)are integrated into distribution networks(DNs)and the distribution automation facilities are widely deployed,the DNs are evolving to active distribution networks(ADNs).This paper introduces the architecture and main function modules of an integrated distribution management system(IDMS)and its applica-tions in China.This system consists of three subsystems,including the real-time operation and control system(OCS),outage management system(OMS),and operator training simulator(OTS).The OCS has a hierarchical architecture with three levels,including the local controller for DER clusters,the optimization of DNs incorporated with multi-clusters,and the coordina-tion operation of integrated transmission&distribution(T&D)networks.The OMS is developed based on the geographical information system(GIS)and coordinated with OCS.While in the OTS,both the ADN and its host transmission network(TN)are simulated to make the simulation results more credible.The main functions of the three subsystems and their interaction data flows are described and some typical application scenarios are also presented. | Wenchuan Wu Penghua Li Bin Wang Yingshang Liu Tao Xu Hongwei Du Yan He | 2022 | Journal of Modern Power Systems and Clean Energy2022，10，2： | 1 |
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