共查询到19条相似文献,搜索用时 78 毫秒
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光子晶体光纤压力传感器可广泛用于各种压力环境监测中.文章分析了光子晶体光纤中光脉冲的传输特性,提出了相位调制型光子晶体光纤压力传感器的基本模型,对光子晶体光纤传感器基于光脉冲相位和光强的信号检测方案进行了讨论.光子晶体光纤传感器的压力敏感性高,而温度敏感远远低于传统的光纤传感器.光子晶体光纤传感器系统简洁、适用. 相似文献
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将25km普通单模光纤(SMF)和高非线性光子晶体光纤(PCF)共同作为增益介质组成分布式混合光纤Raman放大器(H—FRA),并考虑前向、后向和双向3种泵浦方式和2种不同参数的PCF在光纤链路的不同位置,研究了其增益和噪声特性。结果表明,当PCF位于增益光纤链路的尾端时,H—FRA具有较好的噪声性能;H—FRA的开关增益不仅与PCF在光纤链路中的位置有关,还与其插入损耗和泵浦方式有关;对位于链路尾端的后向和双向泵浦H—FRA,增益和噪声性能均最佳。 相似文献
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制作了一种基于光子晶体光纤(PCF)和单模光纤( SMF)错芯结构的全光纤传感器。实验中,采用5cm的PCF,将其两端分别与SMF错芯熔接,制 成传感单元。第1个错芯结构将宽带光源的光分别耦合到PCF的纤芯和包层中,纤芯模式和包 层模式经过一定传输距离后进行SMF的纤芯,满足相位条件的发生干涉。在光谱仪(OSA)中观 测其干涉谱。当外界温度、折射率变化时,观测干涉峰位置的改变可实现对温度和折射 率的传感。实验结果显示,本文光纤传感器对温度的灵敏度为-8×10-3 nm/℃,对折射率的灵敏度为102nm/RIU。 对PCF填充乙醇后,制成相同结构的传感器,温度灵敏度达到-1.008nm/℃,提高了123倍。本文传感器制作简单,操作方便,能够广泛 应用于生物和物理传感领域。 相似文献
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Based on the interferences between core modes and cladding modes in photonic crystal fiber (PCF),a novel temperature sensor is presented and experimentally demonstrated.The peak wavelength of the interference spectrum linearly increased with an increase in temperature.A measurement sensitivity of 10.38 pm/℃ was experimentally achieved for temperatures ranging from 30℃ to 100℃.Experimental results also indicate that the curvature and transverse load do not have a distinguishable influence on the transmission spectrum of the proposed fiber sensor,which ensures its applicability for practical applications. 相似文献
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Brillouin scattering characteristics of photonic crystal fibers (PCFs) are investigated theoretically and experimentally in this paper. The results of two kinds of PCFs are compared and discussed, the influences of size of fiber core on the acoustic modes and hence on the Brillouin resonance peaks are explained. Furthermore, the improvement for our research is also presented. 相似文献
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理论分析了空气孔尺寸与晶格常数对光子晶体光纤(PCF)单模特性的影响,设计了大模场双包层PCF的波导结构。采用自主知识产权的专利技术,制备出高数值孔径大模场掺Yb双包层PCF,其内包层数值孔径为0.65,纤芯数值孔径为0.06,有效模场面积为1 465.7μm2。 相似文献
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Dimpi Paul Rajib Biswas Gunjan Saikia 《International Journal of Communication Systems》2021,34(1):e4669
We report here the development of two computational tools PCFPS (Photonic Crystal Fiber Parameter Study) and PCFPA (Photonic Crystal Fiber Parameter Analysis), equipped with graphical user interface (GUI) for modeling of photonic crystal fiber. The tools are based on different structural parameters, and they provide characteristic analysis of the modal parameters from the structural parameters. The main feature of PCFPS is that it enables the user to find out the values of each defining modal parameter that has an immense contribution towards the manufacture of photonic crystal fiber. Additionally, PCFPA allows the user to observe the variation in the modal parameters with respect to the changes in structural parameters (such as d, Λ, d/Λ, and λ/>Λ). Besides their ease of use, these two schemes have high computational precision and adaptability, giving a novel platform to optical engineers to modulate the microstructured fibers according to their requirement. 相似文献
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对相位敏感型低相干光干涉(OLCR)法延时测量系统进行了理论分析,建立了相关数学模型,搭建了基于非平衡迈克尔逊干涉仪的OLCR测量装置,以掺铒光纤放大器(EDFA)自发宽谱光作光源,对光子晶体光纤(PCF)延时(1540~1560nm)进行测量,取得0.14ps左右的测量精度。利用该系统测量光学元件参数,多采用元件末端面反射光与参考光干涉,但对光纤等器件的延时参数进行测量时,利用透射光会更加方便。 相似文献