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Characteristic Analysis and Design of Optical Film Filters

Author: FuYuJie
Tutor: ChenGenXiang
School: Beijing Jiaotong University
Course: Communication and Information System
Keywords: Thin-film filter Fabry - Perot Transfer matrix Narrow-band filter
CLC: TB43
Type: Master's thesis
Year: 2009
Downloads: 162
Quote: 1
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Abstract


With the rapid development of optical communication technology , dense wavelength division multiplexing ( DWDM ) technology is increasingly a cause for concern , the key devices for DWDM technology multiplexer and demultiplexer . In the multiplexing / demultiplexing filter , thin - film optical filter has excellent temperature stability , low polarization dependent loss , high channel isolation , mature preparation process , etc. , the first commercial the most widely used , is still the market share of a filtering device . To the DWDM system as wavelength division multiplexing / demultiplexing core device - multi - level narrow-band thin-film filter as the main object . Using the transfer matrix method and MATLAB software simulation of a detailed analysis of the characteristics of the thin - film optical filter designed on the basis of the conclusions of five Fabry - Perot narrow-band filter , and its spectral intensity characteristics and phase characteristics were studied , the main tasks include: ( 1 ) the basic theory of thin - film optical detail, including the basic theory of the electromagnetic field transfer matrix theory , the theory of optical properties of the multilayer film analysis . (2) the use of the transfer matrix method Fabry - Perot interferometer optical properties of theoretical study , based on systematic analysis of the membrane system and its spectral characteristics of the Fabry - Perot thin film filter the inter- relationship . ( 3) Analysis of the spacer layer interference level plays , the number of layers of the membrane system and a high impact of the ratio of the low refractive index Fabry - Perot thin film filter , the spectral pass-band width . ( 4 ) using the MATLAB software to carry out a detailed analysis of the simulation of multi - level spectral characteristics of a Fabry - Perot thin film filter , and passband ripple is suppressed . Designed according to the conclusions of the analysis of the five - film Fabry - Perot narrow band filter , and the spectral intensity and phase characteristics were analyzed .

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CLC: > Industrial Technology > General industrial technology > Industrial common technology and equipment > Thin-film technology
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