排序方式: 共有16条查询结果,搜索用时 15 毫秒
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智能化掺铒光纤放大器 总被引:3,自引:0,他引:3
介绍一种智能化的掺铒光纤放大器(EDFA)技术.基于掺铒光纤的光放大特性与EDFA内外部工作参量(如构成EDFA的元器件参量、泵浦激光参量、输入/输出光信号参量等)的关系,采用智能化处理技术使EDFA能按照外界条件,自动地调整自身工作状态,使之符合应用系统的需要.智能化掺铒光纤放大技术可以使EDFA的应用更灵活,既可用作前置放大,也可用作功率放大或线路放大,同时还带来一些新的特点和优越性能.实验制作的智能化EDFA可以在输入信号小到-40dBm或大到+10dBm即约50dB的宽动态范围内正常工作. 相似文献
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A new dual band erbium-doped fiber amplifier configuration that provides 120 nm of optical bandwidth is simulated. This configuration employs a split-band architecture in which optical signals are splitted using a 1550/1610 nm port filter into two independent sub-bands which then pass in parallel through separate branches of the optical amplifier. Each branch may be optimized for the sub-band that traverses it. The independent sub-bands are combined and flattened before output, resulting in a 120 nm bandwidth gain-flattened optical amplifier. 相似文献
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We design a compact triplexer based on two-dimensional (2D) hexagonal lattice photonic crystals (PCs).A folded directional coupler (FDC) is introduced in the triplexer beside the point-defect micro-cavities and line-defect waveguides.Because of the reflection feedback of the FDC,high channel drop efficiency can be realized and a compact size with the order of micrometers can be maintained.The proposed device is analyzed using the plane wave expansion method,and its transmission characteristics are calculated using the finite-difference time-domain method.The footprint of the triplexer is about 12× 9 μm,and its extinction ratios are less than –20 dB for 1310 nm,approximately –20 dB for 1490 nm,and under –40 dB for 1550 nm,making it a potentially essential device in future fiber-to-the-home networks. 相似文献
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Design and parametric amplification analysis of dispersion-flat photonic crystal fibers 总被引:5,自引:0,他引:5
In recent years, a new type of broadband amplifier, fiber optical parametric amplifier (FOPA) has been investi- gated, which utilizes four-wave mixing (FWM) to amplify the signals and offers a broadband amplification at arbi- trary wavelengths[1]. Though simple single-pump FOPA could offer a gain bandwidth of more than 200 nm, the gain spectrum is not flat over the amplifier bandwidth but has a difference as high as 15 dB between the lowest and the highest values, which brings to the diffi… 相似文献
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1 Introduction Anongoingchallengeintheopticalcommunicationsistomaximisethedatatransmissioncapacityofasinglefiber.TheintroductionofmultiplechannelsthroughDenseWavelengthDivisionMultiplexing(DWDM )systemshasgreatlyimprovedthiscapacity ,becauseofthesteady… 相似文献
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高温熔制Er3+,Yb3+离子掺杂CaO-Y2O3-Al2O3-SiO2系统玻璃,并进行微晶化处理,研究了微晶玻璃中Er3+离子的发光及上转换发光特性,分析了微晶玻璃上转换发光机理.结果表明:原始玻璃经热处理得到了Er,Yb:YAG微晶玻璃,微晶玻璃中Er3+离子在室温下4I13/2→4I15/2跃迁产生横盖1450—1650nm区间的超宽带荧光,荧光半高宽达180nm,这可能由于YAG微晶相中Er3+离子与玻璃相中残留Er3+离子的共同发光;Er3+与Yb3+离子局域基质声子能量的降低使微晶玻璃Er3+离子上转换发光强度与原始玻璃相比显著提高,绿光、红光上转换荧光强度比玻璃样品分别增强约7和3倍;微晶化后Er3+,Yb3+离子局域环境发生变化也导致微晶玻璃中Er3+离子绿光、红光上转换发光相对强度发生变化.
关键词:
铒
镱:钇铝石榴石
微晶玻璃
荧光光谱 相似文献