共查询到19条相似文献,搜索用时 125 毫秒
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提出了一种新型的基于多电极单端耦合半导体光放大器(SOA)的交叉增益调制(XGM)型波长转换方案,并建立了这种波长转换器完整的宽带理论模型.通过数值模拟的方法,比较了基于多电极单端耦合SOA的XGM型波长转换和基于单电极单端SOA的XGM型波长转换的输出特性,结果表明前者的输出消光比优于后者,而且啁啾特性也略有改善.
关键词:
多电极
波长转换
单端耦合半导体光放大器
交叉增益调制
消光比
啁啾 相似文献
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从理论和实验上研究了基于半导体光放大器的交叉增益型波长转换器的转换特性.实验研究了转换特性与信号调制格式、放大器增益的关系.利用大信号分析模型讨论了消光比、平均功率转换效率和交流转换效率等性能与平均抽运功率、探测功率及放大器增益特性之间的关系.结果表明,交流转换效率能综合消光比和平均功率转换效率两种指标,在转换器性能优化中有重要的作用 交叉增益型波长转换器输入动态范围较小,很难实现对信号调制格式透明 放大器的增益是取得最佳转换性能的关键
关键词: 相似文献
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从光电集成电路的角度出发,根据量子点半导体光放大器(QD-SOA)中载流子跃迁速率方程和光场传输方程,建立了QD-SOA等效电路模型,并通过电路仿真的方法对QD-SOA的增益谱、饱和增益特性等进行了仿真和分析;利用QD-SOA的交叉增益调制研究了速率分别为40Gbps、100Gbps和160Gbps时的波长转换特性,并分析了不同的偏置电流、功率的信号光和探测光对输出信号消光比和Q值的影响,其转换速率可达到100Gbps,消光比ER约为10dB,Q值约为2.2.该研究对提高基于QD-SOA的交叉增益调制波长转换的性能具有指导意义. 相似文献
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研究了基于半导体光放大器(SOA)结合延迟干涉仪(DI)结构的伞光波长转换.分析了SOA-DI结构的工作原理和DI参数的作用,进行了10 Gb/s和40 Gb/s归零码全光波长转换实验研究.实验结果表明,基于SOA中交叉增益调制(XGM)效应实现的波长转换为反相转换,输出信号消光比较低.当工作速率较高时波长转换信号质量明显恶化.而SOA-DI结构可实现同相波长转换并可改善波长转换信号的消光比,从而改善单个SOA实现波长转换的性能并提高系统的工作速率,该结构还具有结构简单、可光子集成等优点. 相似文献
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研究了基于半导体光放大器平行双抽运对光正交频分复用信号进行全光波长变换的系统.信号光源经2Gb/s电信号直接调制后再和双抽运光耦合,经半导体光放大器后,由于四波混频效应而产生新的波长的信号光.实验结果显示,经半导体光放大器四波混频效应后,产生新的波长的信号光将携带OFDM信号且偏振不敏感,转换效率与双抽运光之间的波长间隔,抽运与信号光波长间距,信号光与泵浦光之间的偏振夹角等有关.同时也测量了转换的OFDM信号的功率-误码曲线和接收星座图. 相似文献
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We analyze the all-optical wavelength converter (AOWC)-based on cross-gain modulation (XGM) in a single-port-coupled (SPC)
semiconductor optical amplifier (SOA). A comprehensive dynamic model is developed by considering longitudinal variations of
the carrier density, the residual rear-facet reflectivity of the SOA and the wide-band spontaneous noise emission. The numerical
simulations for the novel wavelength conversion at 10 Gbit/s are presented based on the model. The extinction ratio (ER),
conversion efficiency and pattern effect of the SPC-SOA-based wavelength converters are investigated, respectively. Compared
with the traditional scheme of the double-portcoupled (DPC) SOA, the SPC-SOA scheme has better performance. We have obtained
that the ER is higher than 10 dB with the pump wavelength turned over 15nm from experiments. The experimental results are
in agreement with the simulation results. 相似文献
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Using a semiconductor-fiber ring laser, a novel method for the all optical wavelength conversion based on dual-pump four-wave mixing (FWM) in a semiconductor optical amplifier (SOA) is demonstrated. For the input signal with different wavelengths, only one external pump is needed. This scheme can simplify the dual-pump FWM in SOA and has nearly constant conversion efficiency and signal-to-noise ratio (SNR) over 50nm range of wavelength shifts. 相似文献
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We theoretically discuss 40 Gb/s semiconductor optical amplifier (SOA)-based wavelength conversion (WC) using a detuning optical bandpass Jilter based on ultrafast dynamic characteristics of SOA. Both the inverted and noninverted WCs are obtained by shifting the filter central wavelength with respect to the probe wavelength when input data signal is in return-to-zero (RZ) format. However, we can obtain format conversion from nonreturn- to-zero (NRZ) to pseudo-return-to-zero (PRZ) and inverted WC when the input signal is in NRZ format. 相似文献
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Supported by the Ministry of Posts Telecommunications the National Natural Science Foundation of China.QI Jiang CHI Nan ZHENG Yuan CHEN Shuqiang GUAN Kejian 《Chinese Journal of Lasers》2000,9(6):488-492
1 Introduction IntheWDMnetwork ,thedesirablefeaturesofanall opticalwavelengthconverterincludepolarizationinsensitivity ,transparencetomodulationformatandbit rate ,fulltunability ,acceptableoutputSNRovertheentirerangeofthewavelengthsusedinthenetwork[1] .Wave… 相似文献
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Simultaneous wavelength conversion based on four-wave mixing (FWM) for 10-Gb/s NRZ payload and 2.5-Gb/s OFDM label signals in optical switching network is experimentally demonstrated. The dual-pump scheme based on FWM in semiconductor optical amplifier (SOA) is employed and simultaneous wavelength conversion for optical packet with one optical payload of 10-Gb/s non-return-to-zero (NRZ) on-off keying (OOK) signals and one optical label of 2.5-Gb/s OFDM signals are realized. The bit-error-rate performance is evaluated for both payload and label after wavelength conversion. 相似文献