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On the Performance of MLR Optical WDM Network Based on ITU-T Conforming Fibers in the Presence of Dominant Physical Layer Impairments

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Journal of Communications and Information Networks 2018年第3期3卷 91-108页

作者： Sridhar Iyer Sujata Sengar Rochak Bajpai Shree Prakash Singh Department of ECE Jain College of EngineeringT.S.Nagar Hunchanatti CrossBelagaviKarnataka 590014India Division of ECE Netaji Subhash Institute of TechnologySector 3DwarkaNew Delhi 110078India

The tremendous and consistent increase in the volume and heterogeneity of traffic has resulted in major innovations in the telecommunication *** regard to the optical networks,existing studies have shown that by adopting a mixed line rate(MLR)strategy,the wavelength division multiplexed optical networks can cost-effectively respond to the diverse variety of traffic requirements which have heterogeneous service *** existing studies which focus on various MLR network issues by considering deployment of the standard single mode fiber only within the network,in the current work,we investigate the signal quality deterioration due to the combined effects of dominant physical layer impairments for an MLR optical network conforming to the various ITU-T compliant fibers and also considering the optical frequency grid based on ITU-T Recommendation *** main aim of our current study is to identify,for a given fiber,the modulation format configuration which provides the highest *** conduct extensive simulations on the considered MLR system using the obtained optimum channel spacing values between the single and mixed line *** results show that the existence of 10 Gbit/s line rate has a detrimental effect on the 40 Gbit/s and/or 100 Gbit/s line rate;however,the 40 Gbit/s and/or 100 Gbit/s line rate’s effect on a 10 Gbit/s line rate is not so detrimental,as well as between the similar line ***,our results clearly show that choice of the line rate of both,the central channel and its adjacent channels,has a major effect on the MLR network performance.

关键词： optical WDM network mixed line rate cross phase modulation four wave mixing ase noise ITU-T

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High Repetition Rate Ultra-Short Pulse All-Fiber Two-Stage Ytterbium Doped Fiber Amplifier

High Repetition Rate Ultra-Short Pulse All-Fiber Two-Stage Y...

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全国第15次光纤通信暨第16届集成光学学术会议

作者： Yun Jian Gao Cunxiao Zhu Shaolan Sun Chuandong Dong Lijun State Key Laboratory of Transient Optics and Photonics Xi'an Institute of Optics and Precision MechanicsChinese Academy of Sciences Graduate School of the Chinese Academy of Sciences

＜正＞A two-stage narrow linewidth fiber amplifier with all-fiber structure based on the technique of master oscillator power amplifier（MOPA）,was theoretically *** seed-signal operating at the wavelength of 1064 nm has the characters of ultra-short pulse duration（10 ps）,high repetition rate（10 MHz）,low single power input（20μW） and single longitudinal *** stimulation model was used to calculate the gain and amplification stimulation emission（ase） at the different pump powers and gain fiber lengths of ytterbium-doped fiber amplifier（YDFA） with a pump of 980 nm laser *** amplification at the different single input powers was *** linear and nonlinear varieties that the output single power depended on the input single power were obtained in the parts of our two-stage amplifier *** calculation results agree with the experimental phenomena,which can guide the design of the YDFA. The parts of our two-stage amplifier were simulated to select the optimal YDF lengths and the pump power. It is evident that an optimum YDF length is about 5 m for any used pump powers and moreover gain difference for pump powers between 140 and 160 mW is only about 0.63 ***,it is not necessary high pump power to optimize amplifier *** these reasons,the 5-m YDF and 140-mW pump power were used to provide high amplification with a low pump *** makes unnecessary the use of the separate pump for each stage,and the amplifier can be simplified by using only one pump diode for both *** noise depended on the fiber length for various pump powers was *** intensity of ase is stronger than that of signal in this *** band-pass filters were introduced to reduce ase noise providing significant improvement on the amplifier *** output power achieves 3.1 *** the second-stage amplifier,it achieves a high amplify efficiency at 300-mW pump power and 5-m YDF *** the two-stage amplifier,the total gain attains 39.89

关键词： ytterbium-doped fiber amplifier amplification gain ase noise

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