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Research Of Polymer Multi-Cladding Electro-Optic Modulator Based On Twin-Core Fiber Bragg Grating

Posted on:2015-02-13Degree:MasterType:Thesis
Country:ChinaCandidate:S Y GaoFull Text:PDF
GTID:2268330425976172Subject:Communication and Information System
Abstract/Summary:PDF Full Text Request
Construction of high-speed dense wavelength division multiplexing optical network has become the main direction of the development of optical fiber communication technology.As one key of fiber optic networks, design and performance improvement of high-speed electro-optic modulator has been one focus of international research in optical communication. Regardless of the current construction of backbone network or fiber to the home, we need to pay close attention to explore and come up with excellent performance and low-cost high-speed optical modulator in that its high cost.This paper focuses on the study of based on twin-core fiber Bragg grating polymer multi-cladding electro-optic modulator’s working principle and basic characteristics, The main research contents and are as follows.1Analyzes and summarizes properties of common electro-optic modulator, mastered the advantages of electro-optic polymer and characteristics of ITO electrode metal, which lay the foundation for structure of the new electro-optic modulator was proposed.2Deduced the coupled mode equations of new electro-optic modulator by single fiber, dual fiber, fiber grating coupled mode equations; Introduced the characteristic equation of twin-core multi-cladding optical waveguide based on multi-cladding optical waveguide theory,thus providing a theoretical basis for multi-clad optical waveguide and the optimized design of new electro-optic modulator3In-depth analyze the impact of twin-core multi-cladding optical waveguide structure parameters on the transmission constants. Meanwhile, we obtained the best value range of first cladding thickness, ITO metal electrode thickness, the thickness of the polymer.4Analysis of the dispersion characteristics of the twin-core multi-cladding optical waveguide, and obtained the corresponding dispersion curves, study the impact of dispersion on multi-cladding optical waveguide.5Analyze how to choose FBG in the new electro-optic modulators and the impact of twin-core optical fiber power mismatch on the new electro-optic modulator performance, focusing on reflection spectra comparison of twin-core optical fiber when at the different external modulation voltage.To meet certain extinction ratio, the new electro-optic modulator has been optimized design which can achieve a double amplitude modulation. Under the same parameters condition, this structure has a superior performance than the single-core electro-optic modulator and significantly reduces the size of the applied modulation voltage.
Keywords/Search Tags:Twin-core Fiber, Fiber Bragg Grating, Polymer, Multi-claddingWaveguide, Electro-optic Modulator
PDF Full Text Request
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