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The Characteristics Research and Circuit Design of Eight Channel CWDM Transceiver Module

Author: WangQiang
Tutor: YaoYong
School: Harbin Institute of Technology
Course: Physical Electronics
Keywords: CWDM optical transceiver module high-speed circuit simulation analysis
CLC: TN929.1
Type: Master's thesis
Year: 2008
Downloads: 63
Quote: 0
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Abstract


The 8-channel 2.5G integrated CWDM(Coarse Wavelength Division Multiplexing) transceiver module described in paper is one of the most important part in today’s fiber-optic communication network. The module integrate 8 wavelength singal from 1470nm to 1610nm(a band at 20nm) which include all the wavelength of the ITU-T G.957 standards stipulated. It not only has the capacity to replace 8 single-wavelength SFP(Small Form Pluggable) CWDM transceiver modules working in communication network, but also has a series of advantages such as smaller size, more integrated as well as lower cost.On the DDM (Digital Diagnostic Monitor) part of schematic Design, an innovative application which uses a single-chip Atmega 88V with 8 DS1856 to constitute the DDM part is adopted, and finally solves the problem successfully.On the PCB design, the paper take the theory of high speed circuit design into PCB design of this module. The high speed circuit problems such as the power integrity (PI) issues, signal integrity (SI) issues as well as electromagnetic interference (EMI) issues encountered in the module are validated and given improvement suggestions by theory analysis and formula derivation. Then the simulation is used to make all problems show on computer and finnally solve them. High speed circuit simulation run through the whole process of PCB design, the paper make us of high speed circuit simulation software Candence SQPI and Mentor Hyperlynx to solve the high speed problems encountered in this design, and make satisfactory results.After the completion of the design, laboratory testing stage was carried out. Every parameter of the transciver module was tested and analyzed in this phase, which finally meet the design requirements.

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Wireless communications > Lightwave communications, laser communications
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