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Research On Optical Add Drop Multiplexer Based On MZI And Fiber Grating

Posted on:2020-06-06Degree:MasterType:Thesis
Country:ChinaCandidate:T SongFull Text:PDF
GTID:2428330590959658Subject:Electronic and communication engineering
Abstract/Summary:PDF Full Text Request
With the development of big data,Internet media and other broadband services,the construction of third-generation optical networks with optical switching units as optical switching nodes is gradually emerging,the optical splitter multiplexer is one of the most important devices,which has received extensive attention and research.In order to solve the problems of high insertion loss,low cost and high performance,This paper focuses on the optical division multiplexer,the cascade grating,Mach-Zehnder interferometer and cascade grating optical division multiplexer and optical network based on optical division multiplexer are studied and analyzed in detail.Mainly completed the following aspects of work:1.The theory of cascade grating is deduced by transmission matrix method.OptiGrating simulation software is used to analyze the effects of cascade number,refractive index modulation depth,duty cycle,chirp,sampling period,phase shift angle,phase shift number on cascade reflectance spectrum.A cascade phase-shifted chirped grating is obtained,which can reflect multiple wavelengths at the same time.Then,the spectrum of the cascaded chirped gratings is optimized by using the toe function,a cascade phase shift chirped toe-cutting grating with more than 50 comb-shaped peaks is optimized.2.Two types of optical add-drop multiplexers are designed according to the research results of cascaded grating: type I optical add-drop multiplexer based on Bragg grating and Mach-Zehnder interferometer which can realize single wavelength up-down,type ?optical add-drop multiplexer based on cascaded phase-shifted chirped apodization grating and Mach-Zehnder interferometer,52 wavelength up-down can be achieved.On the basis of type I optical add-drop multiplexer,16-channel fixed optical add-drop multiplexer,8-channel reconfigurable optical add-drop multiplexer and 8-channel bidirectional transmission reconfigurable optical add-drop multiplexer are designed respectively.OptiSystem software is used to simulate these optical add-drop multiplexers,and the spectrum analysis diagrams of each port are obtained to verify their feasibility.3.By applying the designed optical division multiplexer to the optical network,three kinds of optical network structures that accord with N×100Gbit/s system technology standard are obtained: bus optical network with fixed optical add-drop multiplexer,one-way ring optical network with reconfigurable optical add-drop multiplexer and mesh optical network with two-way transmission reconfigurable optical add-drop multiplexer.The three optical networks are simulated and analyzed by Optisystem software respectively,and the feasibility of each network structure and the compatibility of OADM and network are verified by observing the signal spectrum of each node.In this paper,the cascade spectrum characteristics of fiber Bragg grating are analyzed in detail,puts forward a new type of structure in the light of the multiplex for multi.channel signals of flexible way up and down have certain reference significance,at the same time,design based on optical network to improve the wavelength of the multiplexer utilization to some extent,be used for reference.
Keywords/Search Tags:Cascade grating, Transmission matrix method, Mach-Zehnder interferometer, Bidirectional transmission optical add-drop multiplexer, Optical network
PDF Full Text Request
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