I
EDFA原理性能、生产工艺及失效原因分析
摘 要
随着通信技术的发展，通信网络在工业数据传输中的应用日益增多。目前在工业数据传输领域大多采用同轴电缆的通信方式进行，虽然经济实用，但在很大程度上限制了应用场合的拓展。为了使远距离的数据传输实现更灵活方便，本文选用EDFA技术进行远程数据的传输。EDFA网络具有网络覆盖率高、速率快等优势，已广泛应用于电力、铁路、石油等行业，这必将成为工业控制及远程监测等领域的发展趋势。
基于掺铒技术的EDFA系统主要由光模块和电模块组成，光模块完成核心的放大等功能，电模块完成相关的控制。模块的各组成部分的参数控制、工艺制程、失效模式是EDFA技术的关键。电模块的辅助使得EDFA的通信系统更易监控，本身的放大功能也更趋完善。
通过研究EDFA的核心技术，比较目前应用的各种放大模式，并通过分析目前的工艺及技术参数的实际控制，研究EDFA的实效模式，以提高生产控制力，促使EDFA模块的长远可靠性提升。
关键词：EDFA，数据传输，通信系统，失效分析
II
Principle of EDFA Performance, Production Process and Failure
Cause Analysis
ABSTRACT
With the development of communication technology, communication network in the application of industrial data transmission is increasing. At present，using coaxial cable communication way mostly in the field of industrial data transmission, although the economic and practical, but largely limits the applications. In order to make the distance of data transmission to realize more flexible and convenient, this article selects the EDFA technology for remote data transmission. EDFA has network coverage rate is high, the fast rate of has been widely used in electric power, railway, petroleum and other industries, this will become a development trend of industrial control and remote monitoring, etc.
EDFA based on erbium-doped system is mainly composed of optical module and electrical modules, optical modules to complete the core function such as amplification, electrical control module to complete related. Light module parameter control of each component, technological process, failure mode is the key of EDFA technology. Auxiliary power module makes the EDFA communication system is easier to monitor and amplification function of itself also more hasten is perfect.
EDFA's core technology through research, compare the application of various zoom mode, and through the analysis of the current process and technical parameters of the actual control, study effective patterns of EDFA, in order to improve the production control, make the long-term reliability of EDFA module promotion.
KEY WORDS：EDFA, data communication, communicational system, failure analysis
III
目 录
摘要????????????????????????????????Ⅰ ABSTRACT???????????????????????????????? Ⅱ 1 绪论????????????????????????????????1
1.1 课题背景和研究意义????????????????????????1 1.2 国内外发展状况?????????????????????????1 2 光放大技术概述?????????????????????????3
2.1 光放大技术发展概况?????????????????????3 2.2 光放大技术简介?????????????????????????3 2.3 光放大器的产生?????????????????????????4 2.4 基本光放大器的组态?????????????????????4 2.5 基本的光谱特性?????????????????????????4
2.5.1 EDFA放大的能级机理?????????????????????4 2.5.2 EDFA实际的展宽谱??????????????????????5 2.5.3 EDFA掺杂物及原因分析????????????????????5 2.6 本章小结?????????????????????????5 3 EDFA的结构模型????????????????????????????6
3.1系统组成????????????????????????????6 3.2 EDFA的关键模块?????????????????????????6
3.2.1 掺铒光纤（EDF）???????????????????????6 3.2.2 光耦合器（WDM）???????????????????????7 3.2.3 光隔离器（ISO）???????????????????????7 3.2.4 光滤波器（Optical Filter）??????????????????8 3.2.5 泵浦源（Pumping Supply）???????????????????8 3.3 EDFA的数学模型?????????????????????????8 3.4本章小结???????????????????????????? 9 4 EDFA的监控系统设计??????????????????????????10
4.1 PD光电探测器??????????????????????????10
4.1.1 PD光电探测器实现功能???????????????????10 4.1.2 PD光电探测电路设计????????????????????10 4.1.3 原理分析?????????????????????????12 4.2 泵浦驱动系统??????????????????????????12
4.2.1 驱动电路功能???????????????????????12 4.2.2 泵浦驱动电路设计?????????????????????12