共查询到15条相似文献,搜索用时 140 毫秒
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在电力系统向智能化发展的趋势下,对无中继超长跨距、大容量传输的需求日益迫切。文章介绍了基于双向拉曼系统40×10 Gbit/s超长跨距传输方案的理论研究和实验测试。系统采用超低损光纤作为传输介质,使用增强型前向纠错(Enhanced Forward Error Correction,EFEC)技术和双向拉曼放大技术,实现了40×10 Gbit/s OTN系统300 km无中继的超长距离传输,系统连续运行稳定。实验成果为衡量大容量超长跨距无中继传输的性能、指标和应用标准等提供了实验依据,为今后电力系统对无中继长跨距传输系统的设计提供了参考。 相似文献
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文章主要讨论了单通路2.5Gbit/s数字系统超长传输的实现技术。对于各种影响2.5Gbit/s系统超长传输的因素,如光缆衰耗、色散和非线性等,分别进行了详细的介绍,并针对这些限制提出了掺铒光纤放大器、色散补偿技术等常用的手段,结合目前最新的技术进展,从理论和实践上,着重对光纤喇曼放大器这种特殊的放大器技术做了分析。最后,提出了2.5Gbit/s单通道系统在250km光纤中无中继传输的应用案例。 相似文献
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介绍了限制2.5 Gbit/s光传输系统超长中继距离传输的4个主要因素:衰减、色散、信噪比、非线性效应,有针对性地提出了掺饵光纤放大器技术、拉曼放大器技术、遥泵放大器技术、色散补偿技术、前向纠错技术等多种克服技术,给出各种克服技术的性能参数,提出了工程中不同站距情况下各种技术的组合方案,总结了2.5 Gbit/s光传输系统工程应用时的最大中继距离。 相似文献
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大跨距无中继光纤通信系统--西部电力通信系统的一种技术选择 总被引:3,自引:5,他引:3
介绍了大跨距无中继光纤通信系统,该系统与一般光纤通信系统不同的是,除了有光纤功率放大器和前置放大器外,还有远泵光纤功率放大器、远泵光纤前置放大器以及喇曼放大器和前向误码纠错技术等。这种系统主要应用于跨距已经超过了一般情况的光通信系统,但又不是特别长的某些特殊场合。提出了该通信系统可以作为我国电力系统在地理和环境条件复杂的西部地区,构建光纤通信系统的一种技术选择,并说明了选择这种技术的现实可行性。 相似文献
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A. F. Abas B. Milivojevic A. Hidayat S. Bhandare D. Sandel H. Zhang R. Noé 《Electrical Engineering (Archiv fur Elektrotechnik)》2006,88(3):211-214
We report on transmission of a net aggregate data rate of 2.38 Tbit/s (excluding an assumed ~7% FEC overhead) over 273 km of fiber with just 16 100-GHz-spaced WDM channels. Due to polarization division multiplex and RZ-DQPSK modulation, each channel carries 160 Gbit/s (including the assumed FEC overhead) although the symbol rate is only 40 Gbaud. Polarizations are demultiplexed using automatic polarization control with a LiNbO3 polarization transformer. In-phase and quadrature data are demodulated in a 1-bit interferometer. 相似文献
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根据包头地区电力调度数据网的网络结构和带宽需求,结合包头地区"十二五"通信规划,提出建设包头地区华为10 Gbit/s光纤自愈环网来满足包头地区电力调度数据网最终的通道带宽需求。考虑到10 Gbit/s光纤环网的实施可能滞后于调度数据网建设,结合包头地区光纤通信网的现状,提出建设2条西门子2.5 Gbit/s光纤链路作为临时过渡的通信通道解决方案。永临结合的通道方案可为内蒙古其他地区电力调度数据网的通信通道建设提供参考。 相似文献
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Configurations of a Raman amplifier suitable for a 1.3‐µm wavelength band are discussed and their properties are experimentally investigated. Pump light with a wavelength of 1.23 µm that is necessary for the Raman amplification in the 1.3‐µm wavelength band is obtained using a 1.06‐µm fiber laser and Raman laser technique. Concerning the Raman laser, wavelength conversion from 1.06 µm to 1.23 µm is effectively achieved using a cavity configuration including fiber Bragg gratings and a dispersion‐shifted fiber. On the other hand, a conventional dispersion compensation fiber which has an essential property of high nonlinearity is applied in order to obtain large gain at 1.3 µm. Net gain of 35 dB and output power of 15 dBm are achieved. To confirm the applicability of the Raman amplifiers to high‐speed optical transmissions, experiments of 20 Gbit/s × 2 WDM repeaterless transmission through a 80‐km conventional single‐mode fiber are carried out. The 1.3‐µm signal should be degraded due to the dispersion caused by the dispersion compensation fiber in the Raman amplifier; However, bit error rate of less than 10 to 12 is obtained at both wavelengths, which is sufficient performance for practical uses. © 2003 Wiley Periodicals, Inc. Electr Eng Jpn, 143(1): 58–65, 2003; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/eej.10137 相似文献
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Sotobayashi H. Chujo W. Kitayama K. 《IEEE journal of selected topics in quantum electronics》2004,10(2):250-258
A highly spectral-efficient transmission system based on optical code-division multiplexing (OCDM) technique is investigated. To meet the rapid increase in the demand of data bandwidth, spectral efficiency is becoming a key factor in optical transport systems. Several modulation formats along with the optical receiver design have been proposed to upgrade the spectral efficiency. OCDM is one of the promising techniques for this purpose. OCDM is the other class of multiplexing technique than optical time-division multiplexing and wavelength-division multiplexing (WDM). OCDM provides unique features such as asynchronous transmission, secure communication, soft capacity on demand, and high degree of scalability. In this paper, we apply OCDM technique to the highly spectral-efficient transmission system by quaternary phase-shift keying optical encoding/decoding along with ultrafast optical time-gating and optical hard thresholding. As a result, a transmission of 6.4 Tbit/s OCDM/WDM (4 OCDM/spl times/40 WDM/spl times/40 Gbit/s) using only C-band wavelength region is experimentally demonstrated with 1.6-bit/s/Hz spectral efficiency. 相似文献
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为了实现光信号的有效传输,减少光纤中色散和非线性效应对通信系统的影响,提出一种基于光纤布拉格光栅(fiber bragg grating,FBG)中间补偿的光电色散补偿技术,即在传输链路上采用FBG中间补偿方式,在接收端采用电色散补偿技术,分别实现了对40 Gbit/s,归零(RZ)码信号的单信道和多信道系统的色散补偿.通过与全光色散补偿技术作对比,可以得到在入射功率较高的条件下,光电色散补偿技术的补偿性能明显优于全光色散补偿技术,同时能够保持较高的Q值,为系统以后的升级、扩容做铺垫. 相似文献