Signal-Restoration Characteristic and Bit-Error-Rate Performance of Perturbed EDFA Systems

宋健; 范崇澄; 姚彦; 冯重熙

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Signal-Restoration Characteristic and Bit-Error-Rate Performance of Perturbed EDFA Systems

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- Signal-Restoration Characteristic and Bit-Error-Rate Performance of Perturbed EDFA Systems
- Acta Electronica Sinica Issue 5, (1995)
- 作者机构：
  
  清华大学电子工程系
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN929.11
- Published：1995
- 稿件说明：
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[1]宋健,范崇澄,姚彦,冯重熙.陆上级联掺铒光纤放大器系统受扰后的信号恢复特性和误码率分析[J].电子学报,1995(05):49-53.

宋健, 范崇澄, 姚彦, et al. Signal-Restoration Characteristic and Bit-Error-Rate Performance of Perturbed EDFA Systems[J]. Acta Electronica Sinica, 1995, (5).
[1]宋健,范崇澄,姚彦,冯重熙.陆上级联掺铒光纤放大器系统受扰后的信号恢复特性和误码率分析[J].电子学报,1995(05):49-53. DOI：

宋健, 范崇澄, 姚彦, et al. Signal-Restoration Characteristic and Bit-Error-Rate Performance of Perturbed EDFA Systems[J]. Acta Electronica Sinica, 1995, (5). DOI：

摘要

通过引入一个描述掺铒光纤放大器（ＥＤＦＡ）受扰后偏离其常态程度的参数Ｘ＿ｉ，本文推导出一个不依赖于具体参数的归一化的ＥＤＦＡ增益表达式，应用该式进行分析的结果表明，以Ｘ＿ｉ作为衡量系统恢复程度的参数，具有简便易行等优点。对于ＥＤＦＡ饱和程度较浅的陆上光纤通信系统而言，系统经３ｄＢ的扰动后，光功率在３级内即可恢复到原值的９０％。扰动引起的系统误码率（ＢＥＲ）的变化，随扰动开始级数的不同而显著不同：前几级ＥＤＦＡ处开始受扰对系统ＢＥＲ的影响甚微；而后几级、特别是末级ＥＤＦＡ开始受扰则可能导致系统达不到所要求的ＢＥＲ，当ＥＤＦＡ增益比小信号增益低１０ｄＢ时，即使末级ＥＤＦＡ受到３ｄＢ扰动，ＢＥＲ仍小于１０￣（－９），系统饱和越浅，受扰动的影响就越严重，需要在实际的系统设计中认真加以考虑。

Abstract

A normalized EDFA gain formula is derived by introducing a parameter X

describing the deviation of EDFA parameters from their stable values. The results show that using X

as the criterion of systern singal-restoration characteristic is simple and practical.For terrestrial systems where EDFAs are less saturated

optical power can regain 90 percent of its original value within 3 stages when the system suffers a 3dB dip. System BER varies with perturbation location. A less saturated EDFA wousld result in a worse BER under perturbation

and this should be seriouly considered in system design.

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