QQ客服 官方微博 反馈留言

浏览/检索结果: 共18条，第1-10条 帮助 限定条件 内容类型：会议论文    专题：长春光学精密机械与物理研究所    第一署名单位    第一作者单位    通讯作者单位     已选(0)清除 条数/页：5101520253035404550556065707580859095100   排序方式：请选择作者升序作者降序题名升序题名降序发表日期升序发表日期降序提交时间升序提交时间降序 Energy Transition between Yb(3+)-Tm(3+)-Gd(3+) in Gd(3+), Yb(3+) and Tm(3+) Co-doped Fluoride Nanocrystals 会议论文 2011 Zhang J. S.; Cao C. Y.; Lu S. Z.; Qin W. P. 收藏  |  浏览/下载：19/0  |  提交时间：2013/03/28 Energy transition between Yb3+-Tm3+-Gd3+ in Gd3+, Yb3+ and Tm3+ Co-doped fluoride nanocrystals (EI CONFERENCE) 会议论文 17th International Conference on Dynamical Processes in Excited States of Solids, DPC'10, June 20, 2010 - June 25, 2010, Argonne, IL, United states Zhang J.; Cao C.; Lu S.; Qin W.-P. 收藏  |  浏览/下载：15/0  |  提交时间：2013/03/25 YF3: 20%Gd3+  20%Yb3+  0.5%Tm3+ nanocrystal has been synthesized by a hydrothermal method. The upconversion (UC) emission and energy transfer progresses between Gd3+-Yb 3+-Tm3+ under a 980-nm continuous wave semiconductor laser diode excitation have been explored. The experimental results show that the violet and ultraviolet (UV) enhancement with Tm3+ upconversion emission occurs in the nanocrystal  and in the same time the UC emissions of Gd3+ from 6D9/2  6IJ  6P5/2  and 6P7/2 states to the ground state 8S7/2 are obtained  too. The dynamic analysis implies that  under 980-nm excitation  the nanocrystal dimension plays a key role in the efficient energy transfer processes between Gd3+-Yb 3+-Tm3tt based on the energy matching conditions. 2011 Published by Elsevier B.V.   Temperature characteristics of high power vertical cavity surface emitting lasers (EI CONFERENCE) 会议论文 Semiconductor Lasers and Applications III, November 12, 2007 - November 13, 2007, Beijing, China Yan C.; He C.; Lu G.; Qin L. 收藏  |  浏览/下载：12/0  |  提交时间：2013/03/25 By using oxidation confinement technology high power vertical-cavity surface-emitting lasers are fabricated in experiment. The electrical and optical performance characteristics such as threshold current  efficiency  emission wavelength  and output power are measured under continuous wave (CW) condition at room temperature. The maximum output power is up to watt regime at wavelength of about 980nm. The temperature characteristics of the device are investigated experimentally in detail. The variation in lasing threshold current with temperature is studied. The characteristic temperature T0 of the device is derived  and the value is about 211K. Such a high characteristic temperature T0 of threshold current can lead to good temperature sensitivity of the device. At the same time  the lasing spectrum characteristics with temperature are also measured. The wavelength shift with temperature is just about 0.06nm/K. From the measured results  it is shown that the device can still operate at high temperature condition.   Vertical-external-cavity surface-emitting lasers: Numerical simulation, and characterization (EI CONFERENCE) 会议论文 Optoelectronic Materials and Devices III, October 27, 2008 - October 30, 2008, Hangzhou, China Yan C.; He C.; Lu G.; Qin L. 收藏  |  浏览/下载：16/0  |  提交时间：2013/03/25 Firstly  the vertical external-cavity surface-emiting lasers (VECSELs) device structure and model was given  and the output characteristic was simple calculated. Then  in experiment  the VECSELs were grown  bonded on to the heat sink  and optically pumped by high-power 808nm diode laser array with fiber output module  the light emission spectra were measured. Finally  The thermal characteristic of the VECSELs was investigated by changing the temperature of the substrate. 2008 SPIE.   High power diode pumped Vertical External-cavity Surface-emitting Lasers (VECSELS) (EI CONFERENCE) 会议论文 IRMMW-THz 2006 - 31st International Conference on Infrared and Millimeter Waves and 14th International Conference on Terahertz Electronics, September 18, 2006 - September 22, 2006, Shanghai, China Lu G. G.; He C. F.; Shan X. N.; Qin L.; Yan C. L.; Ning Y. Q.; Wang L. J. 收藏  |  浏览/下载：12/0  |  提交时间：2013/03/25 We describe the theoretical analysis and calculations of the 980nm high-power diode-pumped vertical external cavity surface emitting laser (VECSEL). The VECSEL with active region of InGaAs/GaAsP/AlGaAs system can be operated near 500mw in a single transverse mode. 2006 IEEE.   High power diode pumped vertical external-cavity surface-emitting lasers (VECSELS) 会议论文 2006 Lu G. G.; He C. F.; Shan X. N.; Qin L.; Yan C. L.; Ning Y. Q.; Wang L. J. 收藏  |  浏览/下载：5/0  |  提交时间：2013/03/28 Anti-stokes fluorescent cooling by energy transfer (EI CONFERENCE) 会议论文 Qin W.; Huang S.; Du G.; Zhang J.; De G.; Zhang J.; Wang Y.; Cao C.; Lu S. 收藏  |  浏览/下载：13/0  |  提交时间：2013/03/25 A new model on the mechanism of anti-Stokes fluorescent cooling is proposed  based on which incident laser induces a phonon-assisted energy transfer from one luminescent center to another in an optical medium and causes medium cooling when the energy transfer is an anti-Stokes process and absorbs phonons. Here  we develop the model in two cases: two-phonon-assisted energy transfer for a small energy mismatch and one-phonon-assisted energy transfer for a large energy mismatch. The dependence of relative cooling efficiency on photon energy and temperature is also discussed in evaluating the new mechanism. 2006 Elsevier B.V. All rights reserved.   Theoretical results of vertical external cavity surface emitting laser (VECSEL) (EI CONFERENCE) 会议论文 IRMMW-THz 2006 - 31st International Conference on Infrared and Millimeter Waves and 14th International Conference on Terahertz Electronics, Sep 18 - 22 2006, Shanghai, China Chun F. H.; Lu G. G.; Shan X. N.; Qin L.; Yan C. L.; Ning Y. Q.; Wang L. J. 收藏  |  浏览/下载：9/0  |  提交时间：2013/03/25 We calculate the characteristic parameters of 980nm infrared vertical external cavity surface emitting laser with the KP method and give the result of the relative longitudinal confinement factor  threshold gain and output power. 2006 IEEE.   Theoretical results of vertical external cavity surface emitting laser (VECSEL) 会议论文 2006 He C. F.; Lu G. G.; Shan X. N.; Qin L.; Yan C. L.; Ning Y. Q.; Wang L. J. 收藏  |  浏览/下载：13/0  |  提交时间：2013/03/28 Vertical-external-cavity surface-emitting lasers operating at different wavelength: design, numerical simulation, and characteristics - art. no. 602004 会议论文 2005 Yan C. L.; Qin L.; Shan X. N.; Lu G. G.; He C. F.; Sun Y. F.; Li T.; Ning Y. Q.; Wang L. J.; Jiang H. L. 收藏  |  浏览/下载：8/0  |  提交时间：2013/03/28