检索结果-南通市图书馆

Effect of different metal-backed waveguides on amplified spontaneous emission

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2012年第8期21卷 284-288页

作者：张波侯延冰娄志东滕枫刘小君胡兵孟令川武文彬 Key Laboratory of Luminescence and Optical Information Ministry of EducationInstitute of Optoelectronic TechnologyBeijing Jiaotong University

We investigate the effect of a metallic electrode on the ability for poly[2-methoxy-5-（2＇-ethylhexyloxy）-1,4- phenylene vinylene] （MEH-PPV） film to undergo amplified spontaneous emission （ASE）. The threshold of the device with Ag cladding is about 10 times greater than that of a metal-free device, but metal such as Al completely shuts off ASE. The ASE recurs when a thin spacer layer, such as a few nanometers of SiO2, is introduced between the MEH-PPV film and the Al cladding. Compared with the Cu or Al electrode, the Ag cladding is most suited to serve as an electrode with its low optical loss due to its high work-function and reflectivity.

关键词： polymer semiconductor amplified spontaneous emission electrode

Theoretical study of amplified spontaneous emission intensity and bandwidth reduction in polymer

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2015年第4期24卷 124-137页

作者： A.Hariri S.Sarikhani Laser and Optics Research School

amplified spontaneous emission （ASE）, including intensity and bandwidth, in a typical example of BuEH-PPV is calculated. For this purpose, the intensity rate equation is used to explain the reported experimental measurements of a BuEH-PPV sample pumped at different pump intensities from Ip = 0.61 MW/cm2 to 5.2 MW/cm2. Both homogeneously and inhomogeneously broadened transition lines along with a model based on the geometrically dependent gain coefficient （GDGC） are examined and it is confirmed that for the reported measurements the homogeneously broadened line is responsible for the light-matter interaction. The calculation explains the frequency spectrum of the ASE output intensity extracted from the sample at different pump intensities, unsaturated and saturated gain coefficients, and ASE bandwidth reduction along the propagation direction. Both analytical and numerical calculations for verifying the GDGC model are presented in this paper. Although the introduced model has shown its potential for explaining the ASE behavior in a specific sample it can be universally used for the ASE study in different active media.

关键词： amplified spontaneous emission bandwidth reduction polymers gain coefficient

Solvent-vapour treatment induced performance enhancement of amplified spontaneous emission based on poly[2-methoxy-5-(2'-ethyl-hexyloxy)-1,4-phenylene vinylene]

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2011年第5期20卷 285-288页

In this work, performance enhancements of amplified spontaneous emission （ASE） from poly[2-methoxy-5-（2＇- ethyl-hexyloxy）-l,4-phenylene vinylene] （MEH-PPV） have been achieved via solvent vapour treatment. Correlations between the morphology of the film and the optical performance of polymer-based ASE are investigated. The active layers are characterised by atomic force microscopy and optical absorption. The results show that the solvent-vapour treatment can induce the MEH-PPV self-organisation into an ordered structure with a smooth surface, leading to enhanced optical gain. Thus the solvent-vapour treatment is a good method for improving the optical properties of the MEH-PPV.

关键词： polymer semiconductor amplified spontaneous emission solvent-vapour treatment

Impact of amplified spontaneous emission noise on the SRS threshold of high-power fiber amplifiers

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2023年第3期32卷 234-238页

作者：刘伟任帅马鹏飞周朴 College of Advanced Interdisciplinary Studies National University of Defense TechnologyChangsha 410073China Nanhu Laser Laboratory National University of Defense TechnologyChangsha 410073China Hunan Provincial Key Laboratory of High Energy Laser Technology National University of Defense TechnologyChangsha 410073China

Impact of amplified spontaneous emission(ASE)noise on the stimulated Raman scattering(SRS)threshold of highpower fiber amplifiers is demonstrated numerically through a spectral evolution *** simulation results confirm that ASE noise in the Raman wavelength band could reduce the SRS threshold of high-power fiber amplifiers *** for ASE noise originated the main amplifier,it becomes stronger and reduces the SRS threshold at shorter operation wavelength below 1052 *** for ASE noise originated from the seed laser,it reduces the SRS threshold at different operation wavelength under the condition that the Raman ratio is over-90 dB in the seed *** theoretical method and results in this work could provide a well reference to extend the operation wavelength of high-power fiber lasers.

关键词： high-power fiber amplifiers amplified spontaneous emission stimulated Raman scattering

Size-dependent amplified spontaneous emission from Organic Crystal Slabs

在线全文

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 2011年第5期27卷 862-865页

作者： YANG Jie DING Ran WANG Rui LIU Chang-jiang LI Ai-wu YU Yong-sen WANG Ji-ping YANG Han State Key Laboratory on Integrated Optoelectronics College of Electronic Science and Engineering Jilin University Changchun 130012 P. R. China Department of Radiology the First Hospital of Jilin University Changchun 130021 P. R. China

The authors investigated size-dependent amplified spontaneous emission（ASE） from organic crystals. Specifically, N-（4-{4-[4-（diphenylamino）styryl]styryl}phenyl）-N-phenylbenzene amine（Ph-TPA2） organic crystals were used in the experiment. The ASE threshold was decreased with the decrease of the width of the crystal at the same gain length, which reflects that total internal reflection plays an important role on the ASE properties in these slab organic crystals. The ASE properties pumped by one- and two-photon were also comparatively studied. We found that the thresholds of ASE in two-photon pumping condition are less size-dependent than those in singlephoton condition because of the nonlinear light generation processes in two-photon absorption processes.

关键词： amplified spontaneous emission Size-dependent Two-photon absorption

Broadband amplified spontaneous emission from Er^3＋ -doped single-mode tellurite fibre

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2006年第12期15卷 2902-2905页

作者：陈东丹张勤远刘粤惠徐善辉杨中民邓再德姜中宏 Key Laboratory of Specially Functional Materials and Advanced Manufacturing Technology of Ministry of Education and Institute of Optical Communication Materials South China University of Technology Guangzhou 510641 China

This paper reports on the fabrication and characterization of a newly erbium-doped single-mode tellurite glass-fibre applicable for 1.5-μm optical amplifiers. A very broad erbium amplified spontaneous emission in the range 1450-1650 nm from erbium-doped single-mode tellurite glass-fibre is obtained upon excitation of a 980-nm laser diode. The effects of the length of glass-fibre and the pumping power of laser diode on the amplified spontaneous emission are discussed. The result indicates that the tellurite glass-fibre is a promising candidate for designing fibre-optic amplifiers and lasers.

关键词： amplified spontaneous emission erbium-doped tellurite fibre thermal stability

Investigation of amplified spontaneous emission of CH3NH3PbI3 perovskite crystal layer

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Investigation of amplified spontaneous emission of CH3NH3PbI...

相位分布管理的准二维钙钛矿薄膜在纳秒脉冲激光泵浦下实现高效放大自发发射

第一届新型太阳能电池暨钙钛矿太阳能电池学术研讨会

作者： Liang Qin Longfeng Lv Qipeng Lu Yu Ning Yufeng Hu Zhidong Lou Yanbing Hou Feng Teng Key Laboratory of Luminescence and Optical Information Ministry of EducationInstitute of Optoelectronic TechnologyBeijing Jiaotong University

The main obstacles that prevent the realization of an electrically driven laser of organic semiconductor are the limited density of electric current, non-radiative state and high-order excited-state annihilation. Recently, the optically pumped amplified spontaneous emission(ASE) from halide perovskites was reported in Nature Materials [1], which might provide a possibility to realize low-cost solution-processable laser. Due to its high gain coefficient, low lasing threshold, high mobility, wide wavelengh range high photochemical stability, organic–inorganic halide perovskites provide the possibility to fabricate electrically pumped laser device. In this work, we investigated the properties of the ASE emission from layer for the sake of understanding AES nature of organic–inorganic halide perovskites. CHNHPbI shows the Full Weight Half Maximum(FWHM) of 8.7 nm and ASE threshold of 660 nJ/pulse which are roughly same as that of conjugated polymers.

关键词： Perovskite Electrically driven laser amplified spontaneous emission

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Science China Materials 2024年第3期67卷 921-930页

作者：韦晓燕刘征征杨洁唐孝生王艳平黄业雄姚亿洪徐新鑫皮明雨杜鹃张丁可 School of Physics and Electronic Engineering Chongqing Normal UniversityChongqing 401331China State Key Laboratory of High Field Laser Physics and CAS Center for Excellence in Ultra-intense Laser Science Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghai 201800China College of Optoelectronic Engineering Chongqing University of Posts and TelecommunicationsChongqing 400065China Chongqing Research Institute Changchun University of Science and TechnologyChongqing 401135China School of Physics and Optoelectronic Engineering Hangzhou Institute for Advanced StudyUniversity of Chinese Academy of SciencesHangzhou 310024China

准二维钙钛矿表现出独特的光物理性质,这使它们成为激光技术潜在进步的优秀候选材料.高性能纳秒脉冲激光和放大自发发射(ASE)是实现连续波抽运光电泵浦激光器的关键工艺.然而,在纳秒脉冲激光泵浦下发展准二维钙钛矿ASE或激光仍然存在一... 详细信息

准二维钙钛矿表现出独特的光物理性质,这使它们成为激光技术潜在进步的优秀候选材料.高性能纳秒脉冲激光和放大自发发射(ASE)是实现连续波抽运光电泵浦激光器的关键工艺.然而,在纳秒脉冲激光泵浦下发展准二维钙钛矿ASE或激光仍然存在一些困难,包括表面缺陷浓度高、俄歇复合和能量传递效率低.本文通过无添加剂的Cs^(+)阳离子掺杂策略,可以很好地控制准二维钙钛矿膜的形貌和相分布,从而解决了低n相导致的能量传递途径不足的问题.本文通过快速的能量传递过程揭示了增益性质和载流子复合.基于此,掺杂适当比例Cs^(+)阳离子的PEA_(2)(FA_(0.7)Cs_(0.3))_(2)Pb_(3)Br_(10)钙钛矿膜的净增益系数比原始钙钛矿薄膜提高了近3倍,从而将纳秒激光激发下的放大自发发射阈值降低到1/3.研究结果表明,在准二维钙钛矿中掺杂Cs^(+)可为实现高性能激光器件的相位分布设计提供见解.

关键词： quasi-2D perovskite cesium cation amplified spontaneous emission energy transfer phase distribution

The stimulated Raman scattering competition between solute and solvent in Rhodamine B solution

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2012年第3期21卷 252-255页

作者：房文汇里佐威孙成林李占龙宋薇门志伟何丽桥 State Key Laboratory of Superhard Materials College of PhysicsJilin University College of Physics Jilin University Department of physics Changchun University of Science and Technology

The competition between the stimulated resonance Raman scattering （SRRS） of Rhodamine B （RhB） and the stimulated Raman scattering （SRS） of ethanol （C2H50H） is observed at the RhB in C2H5OH solution. For different concentrations of the solution, the peak wavelengths of the SRRS, the amplified spontaneous emission （ASE）, the fluorescence and the absorption of RhB are different. The SRRS of RhB and the SRS of C2H50H are simultaneously generated when the concentration of the solution is 10-5 mol/L and the energy of the excitation laser is 20.4 mJ. Otherwise, only either the SRRS of RhB or the SRS of C2H5OH is generated. The SRRS can be amplified by the ASE gain when the SRRS is near the peak of the ASE, and the peak wavelength of the SRRS coincides with the wavelength of the maximal intensity ASE.

关键词： stimulated resonance Raman scattering Rhodamine B amplified spontaneous emission