共查询到19条相似文献,搜索用时 156 毫秒
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基于磁调谐光纤Bragg光栅的全光纤型多路分/插复用器 总被引:1,自引:0,他引:1
提出了一种新型的用作多信道切换的光分/插复用器,它由多个可调谐光纤Bragg光栅、一对光纤环行器、WDM复用器和解复用器构成。讨论了该分/插复用器的结构、性能和特点。利用磁极间磁场力使光纤光栅产生显著的波称偏移。用可编程磁极来调控光栅的波长偏移。其信道波长调谐速度快,装置无需外加能源即可保护信道波长的偏移。 相似文献
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本文主要研究DBR掺饵光纤激光器的功率特性。通过对光纤Bragg光栅的光谱特性和激光器的传播方程的分析,得到了阈值泵浦光功率、掺饵光纤长度、Bragg光栅反射率与激光器输出光功率之间的关系。与近期报道的实验数据进行了比较,结果十分吻合。 相似文献
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本文将全面分析Chirped Bragg光纤光栅的色散特性,并对色散特性作一定性分析,利用耦合模方程导出ChirpedBragg光栅的反射率方程,从而推导出Chirped Bragg光纤光栅的色散计算公式,然后,引入微波领域的“品质因素”概念,从而量化了色散补偿器的补偿能力。 相似文献
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光纤光栅Bragg波长随温度和应力的变化特性及其补偿 总被引:8,自引:0,他引:8
本文主要用实验数据简要叙述了光纤光栅中Bragg波长随温度和应力的变化呈良好的线性关系,并介绍了一种温度补偿仪,它能有效地抑制光纤光栅的Bragg波长随温度的漂移。 相似文献
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本文用传输矩阵法分析了啁啾Bragg光纤光栅的反射谱特性及时延特性,同时给出了用142mm长相位掩模板和扩束技术研制的色散补偿线性啁啾Bragg光纤光栅的反射谱特性及传输实验结果.实验研制的线性啁啾Bragg光纤光栅样品带宽为0.56~0.84nm,可实现对普通光纤色散补偿100km以上. 相似文献
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基于马赫-曾德尔干涉仪和光纤光栅的光分插复用器 总被引:15,自引:2,他引:15
光分插复用器(OADM)是波分复用(WDM)系统中的关键器件之一。提出了一种结构新颖的基于马赫-曾德尔(M—Z)干涉仪和光纤光栅(FBG)的光分插复用器,它由两个三端口光环形器、一个光纤光栅和一个马赫-曾德尔干涉仪组成,马赫-曾德尔干涉仪起着光开关的作用。对光分插复用器的输出特性进行了实验研究,实验中调节干涉仪的臂长差,可以实现信号的上下载或直通功能,上下载时通道的隔离度大于20dB。这种结构的光分插复用器具有结构简单、体积小、价格低等优点,在波分复用技术中具有实际应用价值。 相似文献
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在光纤通信系统中,OADM是实现波分复用技术的重要器件之一,其信道间隔、带宽及选频速度等参数决定了系统的性能。OADM的核心器件是光滤波器,为了提高其带宽及速度,提出了一种基于压电控制FBG的快速调谐OADM,设计了基于PZT快速控制应变场实现波长选通的调谐结构。系统调制电压范围为0~160 V,实现了对1548.325~1553.248 nm范围内的扫频。通过Matlab仿真分析获得了FBG有效长度、调制深度与反射光峰值反射率和反射带宽的函数关系,并依据此确定了系统参数。实验利用PZT对FBG进行波长选通控制,结果显示,加载曲线与卸载曲线基本相符、线性度好,能够实现快速窄带带通控制。并对1548.325 nm信号光的上、下载及直通进行了测试,结果符合设计要求。该新型OADM具有控制速度快、线性度高等优点,在光纤通信中具有一定的应用价值。 相似文献
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光纤光栅和环行器构成的多路光分插复用器 总被引:1,自引:0,他引:1
讨论由光纤光栅和光环行器构成的光分插复用器的结构,性能和特点,提出采用一段刻有多个光纤布拉格光栅的光纤,两个光环行器,WDM复用器和解复用器等器件,构造能够对WDM的多个信道实施分插操作的光分插复用器,该光分插复用器的插入损耗要比简单地把多个单路的光分插复用器进行级联时小得多,波分复用全光网络中的光分插复用技术,是实现波分复用网络的关键技术之一。 相似文献
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Optical network based on wavelength-division multiplexing (WDM) technology will be a most active research topic in the 21 st century. This paper describes a WDM multiple-wavelength transmitter and several key corresponding devices for optical network, including amplified spontaneous emission (ASE) spectrum-sliced multiple-wavelength optical source, optical add/drop multiplexer (OADM), semiconductor optical amplifier (SOA), as well as the spectrum noise suppression scheme. The new research results are reported, and the applications of these developed devices are also introduced. 相似文献
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Access and metro networks based on WDM technologies 总被引:3,自引:0,他引:3
Iwatsuki K. Jun-ichi Kani Suzuki H. Fujiwara M. 《Lightwave Technology, Journal of》2004,22(11):2623-2630
This paper describes the technical issues of access and metro networks based on wavelength division multiplexing (WDM) technologies, some solutions, and an experimental demonstration. A WDM star access network with colorless optical network units (ONUs) is proposed. For realizing the colorless ONU, two approaches are introduced; optical carrier supply and spectrum slicing. In addition, a WDM metro ring network with scalable optical add/drop multiplexers (OADMs), namely the tapped-type OADM, is proposed to effectively accommodate the large amount of traffic issued from access networks. Prototypes are constructed and used to verify the feasibility of the proposed WDM technologies. 相似文献
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提出了一种新颖的分插复用单元,在此基础上利用介质膜干涉滤光片阵列和直线步进电机设计了波长可配置的OADM。与其它种类的分插复用器相比,这种方案具有结构简单、性能好、成本低等优点,可广泛应用于城域网以及接入网。 相似文献
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Metropolitan DWDM: a dynamically configurable ring for the KomNetfield trial in Berlin 总被引:1,自引:0,他引:1
We present the system concept of a dynamically configurable all-optical add/drop multiplexer for metropolitan wavelength division multiplex rings using dense channel spacing (DWDM). We first outline the essential network requirements. Subsequently, an optical system concept is presented that meets these requirements. In the network elements, innovative all-optical switching technology is employed. Tunable fiber Bragg gratings that perform routing functions by wavelength filtering are discussed in more detail. The system is laboratory-tested. It has been installed in Berlin for a multi-vendor field trial within the German research program “KomNet.” Three optical add/drop multiplexers form a dynamically configurable Metro DWDM ring. Metro DWDM accommodates high bandwidths: a metropolitan ring that provides 0.8 terabit/s ring capacity has been demonstrated. Furthermore, Metro DWDM can provide optically transparent channels enabling the transport of various data formats simultaneously, e.g., SONET/SDH and Gigabit Ethernet. Conversion to a standard format becomes obsolete. The all-optical add/drop multiplexer (OADM) presented provides both manual and dynamic configuration. The system concept of the OADM is developed starting with basic metropolitan DWDM network requirements. The features of the DWDM ring are described, followed by a presentation of the system concept of the flexible OADM. Our focus is on dynamic configuration techniques. Since tunable fiber Bragg gratings are promising components for dynamic optical channel switching, this technology is treated in more detail 相似文献
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