共查询到20条相似文献,搜索用时 79 毫秒
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背景辐射与光子平衡态 总被引:2,自引:0,他引:2
背景辐射与光子平衡态张邦固(科学出版社北京100717)BackgroundRadiationandPhotonEquilibriumStateZhangBanggu(SciencePres,Beijing100717)AbstractTheBac... 相似文献
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OpticsofIntenseLightandItsApplications¥byLIUSonghaoandHEGuangsheng(BookNo:ISBN7-5359-1102)Anewbook"OpticsofintenseLightandits... 相似文献
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Pang Xiaofeng 《原子与分子物理学报》1996,(1)
AMolecularDynamicalTheoryofUltraweakBio-photonEmissioninLivingSystemsanditsProperties(Ⅱ)AMolecularDynamicalTheoryofUltraweakB... 相似文献
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《Chinese Journal of Lasers》1996,(6)
AnalyticSubjectIndextoVolumeBS,(1996)LASERDEVICESPUlsewidthcharacteristicsofmode-lockedTi:sapphirelaserwithringcaavityKerr-le... 相似文献
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拉曼光谱在医学上的应用(Ⅱ)余国滔(北京大学生命科学学院北京100871)BiomedicalApplicationsofRamanSpectroscopy(Ⅱ)YueKwokto(ColegeofLifeSciences,PekingUnivers... 相似文献
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《Chinese Journal of Lasers》1997,(6)
AnalyticSubjectIndextoVolumeB6,(1997)LASERDEVICESNo.PageThetemperaturedistributioninlongitudinalypumpedTi∶sapphirelasers11Cha... 相似文献
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WEN Guojun QIAN Liejia LU Junxiao FAN Dianyuan DENG Ximing 《Chinese Journal of Lasers》1994,3(6):511-520
Stimulated Brillouin scattering(SBS) excited with a phase-modulated pump laser¥WENGuojun;QIANLiejia;LUJunxiao;FANDianyuan;DEN... 相似文献
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LIU Shutian 《Chinese Journal of Lasers》1995,4(3):275-280
OpticalAssociativeMemoryBasedonDoublePhaseConjugationUsingBi_(12)TiO_(20)PhotorefractiveFiber¥LIUShutian(DepartmentofPhysics,... 相似文献
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《Chinese Journal of Lasers》1994,(6)
Analytic Subject Index to Volume B3,(1994)LASERDEVICESNo.Page Vertical--cavitysurface--emittinglasersfabracatedtwicebyimplant... 相似文献
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光纤电流互感器日益成为电力系统中最重要的设备,在实用化研究中,光纤电流互感器的检测精度是重要的指标之一,而被测电流的谐波和光纤电流互感器内部的噪声往往影响其测量的准确性。因此对光纤电流互感器谐波的检测以及对其解调算法实用性的验证非常重要。为进一步的谐波治理提供依据及验证解调算法能否有效运用问题,在详细分析现有的谐波检测理论和两种解调算法原理的基础上,设计了一种基于虚拟仪器LabView的光纤电流互感器谐波检测及解调算法测试一体化系统,在快速检测电流各次谐波电平的同时解调出被测电流的信息并对比验证两种解调算法的可行性与优越性,验证结果表明第二种解调算法的精度明显优越于第一种解调算法,更能适用于光纤电流互感器的信号解调。 相似文献
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为实现微流控芯片上微液滴的检测与计数,设计了光纤式检测与计数单元,使用TracePro软件进行建模仿真以便为检测信号处理提供依据。根据液滴通过检测区域时引起的光强变化来实现计数,分析了照明光束准直性、液滴尺寸、液滴相对溶液折射率以及接收光纤相距芯片距离对光强变化的影响。仿真实验结果表明,照明光束准直性越差,液滴半径越大,相对溶液折射率越低,接收光纤距离越近,相对光强变化越明显,并且液滴大小决定着光强变化曲线中是否会出现双波谷现象,液滴半径小于13 μm时,液滴检测信号为明显的单波谷,半径大于17 μm时,液滴信号为明显双波谷。根据仿真结果提出了检测信号的处理方法,表明该单元可以实现微流控芯片上微液滴的检测与计数功能。 相似文献
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Lianxin Li Shupeng Liu Zhenyi Chen Zhangmin Dai Na Chen Fufei Pang Yana Shang Bo Lu Tingyun Wang 《Optics and Spectroscopy》2014,116(4):575-578
Optical fiber nanoprobe with gold nanoparticles substrate on the surface was prepared by electrostatic self-assembly technology. Surface-enhanced Raman spectrum of the cells was measured using the optical fiber nanoprobe by remote detection method and direct detection method using confocal Raman micro-spectroscopy. The spectrum were analyzed with the detailed chemical components. The remote detection method using the optical fiber nanoprobe could make the probe inserting into the cells or tissue, and that may be helpful for the online SERS measurement of the cells in the biomedical research and diagnosis in the future. 相似文献
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Yuangang Lu Cunlei Li Xuping Zhang Scott Yam 《Optics and Lasers in Engineering》2011,49(9-10):1111-1117
The thermal residual strain induced in the cabled optical fiber is a very important factor for evaluating the reliability of optical fiber cables. In order to determine the distributed thermal residual strain in cabled optical fiber, a measurement method based on Brillouin optical time-domain reflectometry (BOTDR) system is proposed in the article. Thermal characteristics of residual strain along cabled optical fibers are investigated theoretically and experimentally based on Brillouin frequency shift (BFS) detection. The thermal residual strain along the cabled fiber, if any, can be determined with a high spatial resolution that is equal to that of the BOTDR system and can be less than a few meters. A double-coated fiber in loose optical cable was used as the test cabled optical fiber, and the experimental results were in good agreement with those predicted from the theory. It has been found that the fiber residual strain increases linearly with decreasing temperature in the range from 50 to ?50 °C. 相似文献
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提出并研制了基于光纤SPR传感探针的新型湿敏传感器。首先研究了光纤SPR传感探针对环境湿度变化的敏感特性,在此基础上提出在光纤SPR传感探针表面增覆不同厚度且具有水分子吸附功能的PVA薄膜来实现环境相对湿度的监测。研究结果表明,增覆双层PVA薄膜的光纤SPR传感探针在高湿区具有较好监测效果,其共振强度对应的相对湿度测量灵敏度达到1.59%/%RH,较光纤SPR探针呈现显著提高。而增覆单层PVA薄膜的光纤SPR传感探针在高湿区共振波长对应的相对湿度监测灵敏度达到2.411nm/%RH。此外所提出的新型光纤SPR湿敏探针在PVA薄膜失效后经过特殊工艺处理仍可重复镀膜使用。 相似文献
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An optical fiber fault location method based on OCDMA coding is proposed, which may locate branch optical fiber fault at local side. The method expands dynamic range through coding gain without influencing event distinction degree. Through simulation, it indicates that dynamic range of the method may support optical fiber fault detection in PON with branching ratio of 1:16 and transmission distance of 20 km, while the distinction degree is about 10 cm. 相似文献