数字光纤传输系统课程设计

課程設計

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電子與信息工程學院

通信工程系

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目錄

THE DIGITAL OPTICAL FIBER TRANSMISSION SYSTEM----------- 3 1. 引言------------------------------------------------- 4 1.1 設計背景------------------------------------------- 4 1.2 光纖通信技術--------------------------------------- 4 1.2.1 光纖通信概念 ------------------------------------ 4 1.2.2 光纖通信發展 ------------------------------------ 4 1.3 數字光纖傳輸的優點--------------------------------- 5

1.4 光纖通信技術的發展前景----------------------------- 6

2.數字光纖傳輸系統設計---------------------------------- 7 2.1數字光纖傳輸的兩種體制------------------------------ 7 2.1.1準同步數字系列PDH ------------------------------- 8

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2.1.2準同步數字系列SDH ------------------------------- 8 2.2 整體設計------------------------------------------ 10 2.3 光發射機------------------------------------------ 11 2.

3.1 光源 ------------------------------------------- 11 2.3.2 調制電路和控制電路 ----------------------------- 11 2.3.3 線路編碼電路 ----------------------------------- 12 2.4 光接收機------------------------------------------ 13 2.

4.1 光檢測器 --------------------------------------- 13 2.4.2 放大器 ----------------------------------------- 14

2.4.3 均衡和再生 ------------------------------------- 14

3.數字光纖傳輸系統分析--------------------------------- 14 3.1性能指標 ------------------------------------------ 14 3.2系統設計分析--------------------------------------- 15 3.2.1中繼距離受損耗的限制---------------------------- 15 3.2.2中繼距離受色散(帶寬)的限制---------------------- 16

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4．總結------------------------------------------------ 16

摘要：

隨著數字技術和光纖通信技術各自的進步，以及社會對于光纖集成網絡以實現資源共享的要求日益增長，數據與光纖通信技術也已緊密地結合起來，成為了社會的強大物質技術基礎。現代社會，數字光纖通信已經越來越多地應用到了社會各個領域中。

光纖通信系統最重要的部分是光發射機、信道和光接受機三個模塊。通過各種光電設備連接成SDH 同步數字序列的數字光纖傳輸系統，最后在分析指標與設計性能方面驗證了系統的合理性。

關鍵詞：光纖通信技術、數字光纖傳輸系統、SDH同步數字序列、性能指標

The digital optical fiber transmission system Abstract:

With the development of digital technology and optical

fiber communication technology and their progress, and the

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society for optical integrated network to realize resource sharing requirements increasing, data and optical fiber communication technology has been closely combined, become society's powerful corporeal technology base. In modern society, digital optical fiber communication has been increasingly applied to all areas of society.

Optical fiber communication system is the most important part of the optical transmitter, channel and optical receiver module three. Through a variety of optoelectronic devices connected to SDH synchronous digital series digital optical fiber transmission system, in the final analysis indexes and design performance with respect to verify the rationality of the system.

Key words: optical fiber communication technology, digital optical fiber transmission system, SDH synchronous digital sequence, performance index

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