低电压通用型双通道仪表放大器INA2128

ＩＮＡ２１２８是美国ＢＵＲ－ＢＲＯＷＮ公司生产的通用型双通道仪表放大器，它的宽电源电压范围在低电压电池供电系统中得到了广泛应用。本文介绍了它的特点和应用，并对应用中的具体问题做了详尽的说明。     

LOG100精密对数放大器

本文分析了对数放大器的基本工作原理，讨论了多种输入信号时ＬＯＧ１００的运算电路，介绍了它的实际应用，并对使用中的几个具体问题作了说明。     

线性光放大器

章介绍了—种新型放大器——线性光放大器的产生的背景，工作原理，并通过与当前几种热门光放大器做比较，进一步说明它在下一代网络中的优势。     

运算放大器的新进展—电流反馈型放大器

本文介绍了一种新型的运算放大器－电流反馈型放大器的特性，原理和应用，这种运算放大器的增益－带宽和摆率显著高于一般运算放大器，并且它的频带，摆率建立时间基本上和闭环增益无关，它可用于通讯，雷达，仪器等各个领域，本文给出了应用实例和电流反馈型放大器性能一览表。     

125MSPS线性采样放大器AD9101

ＡＤ９１０１是一种性能优良的高速度，低失真线性采样放大器，它采用了独特的闭环设计，具有低噪声，高精度，高采样速度和宽采样频带等优点，本文简要介绍了它的工作原理，技术特点及典型应用。     

电流反馈放大器及其应用

介绍了电流反馈放大器及由它构成的ＲＣ正弦振荡器，滤波器和电感仿真与频变负阻仿真电路。分析了ＣＦＡ的寄生电阻玫电容对ＲＣ振荡器性能的影响，得到了忽略寄生电阻与电容的条件下。提出了ＣＦＡ构成的各类基本运算电路。     

MCM真对数放大器

本文介绍了ＭＣＭ真对数放大器的设计原理，通过ＳＨ３０６的有关数据，展示出它广泛的应用范围，给出了应用数据和应用电路，供用户使用时参考。     

CATV共用天线放大器前端立柜介绍

本文介绍了ＣＡＴＶ大功率共用天线放大器前端立柜，它采用了ＶＨＦ／ＵＨＦ分频道先放大、后混合的方案，解决了ＶＨＦ／ＵＨＦ频道间隔离度差的难题，输出功率大，是大系统共用天线理想的前端设备。     

AD202／AD204隔离放大器及其应用

ＡＤ２０２／ＡＤ２０４是一种二端变压器耦合的隔离放大器，它能实现对输入和输出的隔离。文中主要介绍它的特点和实验应用电路。     

ATF—36077在C波段低噪声放大器上的应用

ＨＰ公司的ＡＴＦ－３６０７７是一种超低噪声砷化镓ＰＨＥＭＴ器件，它适用于ＫＵ波段的卫星直播系统，Ｃ波段电视系统和电视接收系统的低噪声放大器，本文着重介绍它的基本性能和由它组成的３．７－４．２ＧＨｚ的频段高增益超低噪声放大器。     

A detailed experimental study on single-pump Raman/EDFA hybrid amplifiers: static, dynamic, and system performance comparison

This paper presents an experimental study on the performance comparison of three different schemes of single-pump dispersion-compensating fiber (DCF)-based Raman/erbium-doped fiber amplifier (EDFA) hybrid amplifiers together with a DCF-based Raman-only amplifier in terms of static properties, dynamic properties, and system impact: Raman-only amplifier (Type I), Raman/EDFA hybrid amplifiers recycling residual Raman pump in a cascaded EDF located either after (Type II) or prior to (Type III) a DCF, and a Raman-assisted EDFA (Type IV), the concept of which was proposed by Kurosawa et al. With respect to the overall gain and system impact based on bit error rate (BER) measurements in a transmission system, the hybrid amplifier of Type II was found to have the best performance among the four types while the Raman-only amplifier shows the best tolerance to transient response.     

Comparison of EDFA and bidirectionally pumped Raman amplifier in a40-Gb/s RZ transmission system

We numerically compare the performance of a bidirectionally pumped Raman and an erbium-doped fiber amplifier (EDFA) system in a 40-Gb/s dispersion-managed return-to-zero (RZ) transmission. The Raman amplifier system shows a substantially higher Q-value compared to that of the EDFA     

Performance limitation due to statistical Raman crosstalk in a WDM system with multiple-wavelength bidirectionally pumped Raman amplification

A general theoretical model of statistical Raman crosstalk and its impact on system performance in a multiwavelength bidirectionally pumped Raman fiber amplifier (RFA) is developed for the first time, where we have taken modulation statistics, dispersion-induced pulse walk-off and signal-induced pump depletion into account. Two kinds of statistical Raman crosstalk, from signal-induced forward-pump depletion and from signal-signal Raman interaction, are included in one model. Formulas for normalized Raman crosstalk, Raman crosstalk-induced relative intensity noise spectral density, and its variance and system performance impact in terms of Q penalty are presented for both a single-span system and a dispersion-compensated multispan wavelength-division-multiplexed (WDM) link. Based on these formulas, we numerically investigate the impact of Raman crosstalk on system performance in a three-wavelengths bidirectionally pumped 40 /spl times/ 40-Gb/s WDM system for various fiber types. In addition, Raman crosstalk in a four-wavelength bidirectionally pumped RFA was experimentally measured. The results agree well with our theory.     

超长距光传输系统中光放大器综合配置技术研究

针对一个超长距OTN光传送网传输案例,我们设计了不同的放大器配置方案并进行了实验研究。通过实验,我们发现使用双向拉曼放大器的配置方案或者使用遥泵放大器的配置方案,都可以完成传输任务,但是系统传输余量比较小。而使用拉曼加遥泵放大器的配置方案则可以得到更多的功率裕度和更高的输出信噪比,而且价格适中。     

拉曼光纤放大器在国内工程中的应用

重点介绍了拉曼光纤放大器在长跨距SDH线路中的应用、产品设计中需要考虑和解决的问题；探讨了超长跨距SDH光传输系统的实现方案和测试结果。同时讨论了拉曼光纤放大器在实际线路应用中需要注意的问题，首次给出了拉曼光纤放大器在国内2．5Gbit／s系统200km G.652光纤上的现场应用结果。     

Dispersion-compensating Raman/EDFA hybrid amplifier recycling residual Raman pump for efficiency enhancement

We experimentally demonstrate a novel concept of the dispersion-compensating Raman/erbium-doped fiber amplifier hybrid amplifier recycling residual Raman pump for increase of overall power conversion efficiency. The proposed dispersion-compensating hybrid amplifier system has only one pump source for Raman amplification in the dispersion-compensating fiber (DCF) and the residual pump power after the DCF is recycled for secondary signal amplification in an erbium-doped fiber cascaded to the DCF. Using the proposed scheme, we achieve the significant enhancement of both signal gain and effective gain-bandwidth by 15 dB (small signal gain) and 20 nm, respectively, compared to the performance of the Raman-only amplifier.     

高入纤功率光纤通信系统的可靠性研究

掺铒光纤放大器(EDFA)和拉曼放大器(FRA)的使用,使得光纤通信系统中的入纤功率有了很大的提高.较高的入纤功率不仅会在光纤中引起各种非线性效应,对光脉冲的传输产生影响,也会对光纤本身的可靠性产生影响,为此介绍了高入纤功率对光纤系统的影响,分析了其产生的机理,并提出了应对措施.     

级联喇曼光纤放大器

介绍了级联喇曼放大器的理论,并报道了最新的实验结果,分析了各种因素对放大器性能的影响,对未来的前景做了展望。     

在瑞利散射影响下分布拉曼光纤放大器噪声特性的解析解和参数优化

光纤中的瑞利散射会对分布拉曼光纤放大器的噪声特性产生不利影响。通过忽略高次瑞利后向反射的影响,给出实际情况下(信号损耗不等于抽运损耗,考虑瑞利散射影响)分布拉曼光纤放大器噪声特性的解析解。利用此解析解,对分布拉曼光纤放大器的噪声特性进行了深入讨论并提出了选择抽运功率的一般原则     

基于改进粒子群算法的后向泵浦RFA设计北大核心CSCD

为了满足第六代移动通信(6G)系统对光通信网络的高速率及大容量的要求,进一步提高光传输网络中光纤放大器的带宽、响应速率及放大倍数等成为目前的研究重点。在使用碲酸盐光纤作为光纤增益介质的同时,提出一种改进粒子群优化算法,通过在迭代过程中动态的调整速度、位置及惯性权重值,获得更高收敛速度,增强全局搜索的能力。应用该算法对拉曼光纤放大器的各个泵浦光参数配置进行优化、分析及仿真验证,最终设计出平均开关增益为23.738 8 dB,增益平坦度为0.209 8 dB的后向泵浦拉曼光纤放大器。结果表明,改进的粒子群优化算法对拉曼放大器泵浦光的参数配置有很强的适应性,能够获得较低的增益平坦度,对未来拉曼光纤放大器的设计具有一定的参考意义。