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Simulation of Intermediate State Absorption Enhancement in Rare-Earth Ions by Polarization Modulated Femtosecond Laser Field
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作者 Wen-Jing Cheng Shi-Hua Zhao 《Chinese Physics Letters》 SCIE CAS CSCD 2018年第11期23-27,共5页
We extend the third perturbation theory to study the polarization control behavior of the intermediate state absorption in Nd^(3+)ions. The results show that coherent interference can occur between the single-photo... We extend the third perturbation theory to study the polarization control behavior of the intermediate state absorption in Nd^(3+)ions. The results show that coherent interference can occur between the single-photon and three-photon excitation pathways, and depends on the central frequency of the femtosecond laser field. Moreover,single-photon and three-photon absorptions have different polarization control efficiencies, and the relative weight of three-photon absorption in the whole excitation processes can increase with increasing the laser intensity.Therefore, the enhancement or suppression of the intermediate state absorption can be realized and manipulated by properly designing the intensity and central frequency of the polarization modulated femtosecond laser field.This research can not only enrich theoretical research methods for the up-conversion luminescence manipulation of rare-earth ions, but also can provide a clear physical picture for understanding and controlling multi-photon absorption in a multiple energy level system. 展开更多
关键词 ab Simulation of Intermediate State Absorption Enhancement in Rare-Earth Ions by Polarization Modulated Femtosecond Laser Field
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Motion performance and impingement risk of total hip arthroplasty with a simulation module 被引量:2
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作者 Hai ZHOU Cheng-tao WANG +3 位作者 Wen-ting JI Xiang-sen ZENG Shu FANG Dong-mei WANG 《Journal of Zhejiang University-Science B(Biomedicine & Biotechnology)》 SCIE CAS CSCD 2013年第9期849-854,共6页
The present study introduced a new motion analysis method for total hip arthroplasty (THA). A motion simulation module of THA was designed and developed, which can simulate the THA’s implantation condition and motion... The present study introduced a new motion analysis method for total hip arthroplasty (THA). A motion simulation module of THA was designed and developed, which can simulate the THA’s implantation condition and motion and detect the theoretic range of motion (ROM) before the prosthetic component impingement happens. 展开更多
关键词 THA Motion performance and impingement risk of total hip arthroplasty with a simulation module
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A Simplified Numerical Simulation Method Considering Active Devices for Opto-Electronic Mixed Modules
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作者 Tomoaki Yoshida Hideaki Kimura +2 位作者 Shuichiro Asakawa Akira Ohki Kiyomi Kumozaki 《光学学报》 EI CAS CSCD 北大核心 2003年第S1期321-322,共2页
A simplified simulation method based on the FDTD technique that can handle active devices is proposed. This method well suits the electrical crosstalk analysis of multi-channel integrated, opto-electronic mixed module... A simplified simulation method based on the FDTD technique that can handle active devices is proposed. This method well suits the electrical crosstalk analysis of multi-channel integrated, opto-electronic mixed modules. We apply this method to an 8-channel integrated super-compact high-sensitivity optical module. The results show good agreement between simulations and measurements. 展开更多
关键词 口口 of In FDTD as BE by for A Simplified Numerical Simulation Method Considering Active Devices for Opto-Electronic Mixed modules
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Simulation design of thin film lithium niobate electro-optic modulator with bimetallic layer electrodes
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作者 WU Qiulin FENG Xinkai +3 位作者 CHEN Jiaying MA Lei CHEN Huaixi LIANG Wanguo 《Optoelectronics Letters》 EI 2024年第6期339-345,共7页
Thin-film lithium niobate electro-optical modulator will become the key device in the future optical communication,which has the advantages of high modulation rate,low half-wave voltage,large bandwidth,and easy integr... Thin-film lithium niobate electro-optical modulator will become the key device in the future optical communication,which has the advantages of high modulation rate,low half-wave voltage,large bandwidth,and easy integration compared with conventional bulk lithium niobate modulator.However,because the electrode gap of the lithium niobate film modulator is very narrow,when the microwave frequency gets higher,it leads to higher microwave loss,and the electro-optical performance of the modulator will be greatly reduced.Here,we propose a thin film lithium niobate electro-optic modulator with a bimetallic layer electrode structure to achieve microwave loss less than 8 dB/cm in the range of 200 GHz,exhibiting a voltage-length product of 1.1 V·cm and a 3 dB electro-optic bandwidth greater than 160 GHz.High-speed data transmission test has been performed,showing good performance. 展开更多
关键词 Simulation design of thin film lithium niobate electro-optic modulator with bimetallic layer electrodes
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