發(fā)布時(shí)間：2018-03-15 07:18

  本文選題：硫系玻璃　切入點(diǎn)：光波導(dǎo)　出處：《寧波大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：近年來,有著一系列獨(dú)特光學(xué)特性的硫系玻璃,如由于較高的折射率而具有的良好的光場(chǎng)限制作用,較高的非線性折射率,較寬的紅外透過窗口(可以達(dá)到20mm)和在通信波段可以忽略的雙光子吸收以及自由載流子吸收,逐漸成為了制作平面光學(xué)波導(dǎo)的理想材料,在現(xiàn)代集成中紅外光學(xué)器件研發(fā)領(lǐng)域具有極大的發(fā)展前景�，F(xiàn)在許多全光進(jìn)程已經(jīng)采用有色散工程的硫系光波導(dǎo),其中包括參數(shù)放大,波長(zhǎng)轉(zhuǎn)換,頻分復(fù)用,超連續(xù)譜的產(chǎn)生等。因此,硫系玻璃在諸多領(lǐng)域有著十分廣闊的應(yīng)用前景和研究意義。色散控制作為硫系光波導(dǎo)的本質(zhì)屬性,在非線性過程中起著重要作用,因?yàn)閷?duì)于許多非線性應(yīng)用,如超連續(xù)譜的產(chǎn)生,四波混頻(FWM),波長(zhǎng)轉(zhuǎn)換,參量放大,孤子裂變等需要平坦的低的色散曲線。在寬波長(zhǎng)范圍內(nèi)低的平坦色散可以用于優(yōu)化相位匹配,這對(duì)許多非線性處理是有益的。然而,硫系材料在近紅外和中紅外通常有大的負(fù)的材料色散,需要特別的波導(dǎo)結(jié)構(gòu)設(shè)計(jì),用波導(dǎo)色散來補(bǔ)償材料色散。我們可以通過靈活調(diào)控波導(dǎo)的相關(guān)參數(shù)的方法來獲得超寬帶平坦色散曲線。本文主要圍繞硫系玻璃材料展開課題的研究,并以此為基質(zhì)從理論和仿真兩個(gè)方面深入分析硫系光波導(dǎo)的特性,文章的組成結(jié)構(gòu)如下:第一章緒論簡(jiǎn)要概述了光波導(dǎo)及其在非線性方面的效應(yīng),并且分析了硫系光波導(dǎo)的應(yīng)用,介紹了硫系玻璃材料在光學(xué)方面的獨(dú)特的性能特征,然后結(jié)合硫系材料的特性說明了本文的研究?jī)?nèi)容和意義。第二章介紹了光波導(dǎo)基本理論,并利用經(jīng)典麥克斯韋方程組,通過推導(dǎo)得到滿足光波傳輸?shù)牟▌?dòng)方程。并進(jìn)一步分析了光脈沖傳輸?shù)膫鬏敺匠?通過進(jìn)一步的學(xué)習(xí)推算出了廣義非線性薛定諤方程。最后還介紹了分析光波導(dǎo)時(shí)需要的邊界條件。第三章主要介紹了基于硫系材料的兩種類型的光波導(dǎo),通過有限差分的方法研究了硫系光波導(dǎo)色散特性和有效面積,并分析了其非線性系數(shù)。在參數(shù)優(yōu)化的基礎(chǔ)上,獲得平坦的低的色散曲線。最后分析了在簡(jiǎn)并四波混頻過程中的相位匹配條件。第四章在第三章的基礎(chǔ)上,我們?cè)O(shè)計(jì)了一種新穎的脊形硫系玻璃波導(dǎo)(As_2S_3)結(jié)構(gòu),這種波導(dǎo)結(jié)構(gòu)可以同時(shí)用于基本準(zhǔn)TE和準(zhǔn)TM模式。對(duì)于TE和TM模,通過色散調(diào)制的方法獲得了具有兩個(gè)ZDW的超寬帶和低的色散曲線。此外,我們計(jì)算了兩種模式的有效面積和非線性系數(shù),并研究了在這種波導(dǎo)結(jié)構(gòu)下超短脈沖泵浦時(shí)輸出超連續(xù)譜的輸出特性。第五章是對(duì)本文研究工作內(nèi)容的總結(jié),并指出了研究工作的缺陷及尚未解決的問題。
[Abstract]:In recent years, sulfur glasses with a series of unique optical properties, such as good light field limiting action due to their high refractive index, high nonlinear refractive index, The wide infrared transmission window (up to 20mm) and the negligible two-photon absorption and free carrier absorption in the communication band have gradually become the ideal materials for the fabrication of planar optical waveguides. In the field of modern integrated infrared optical devices, there is a great development prospect. Nowadays, many optical processes have adopted sulfur optical waveguides with dispersive engineering, including parameter amplification, wavelength conversion, frequency division multiplexing, etc. Therefore, sulfur glass has a broad application prospect and research significance in many fields. As the essential property of sulfur optical waveguide, dispersion control plays an important role in the nonlinear process. For many nonlinear applications, such as the generation of supercontinuum spectrum, FWM, wavelength conversion, parametric amplification, soliton fission and so on, flat low dispersion curves are required. Low flat dispersion can be used to optimize phase matching in a wide wavelength range. This is useful for many nonlinear processing. However, sulfur materials usually have large negative material dispersion in near infrared and middle infrared, requiring special waveguide structure design. Using waveguide dispersion to compensate material dispersion. We can obtain UWB flat dispersion curve by adjusting the relevant parameters of waveguide flexibly. The characteristics of sulfur optical waveguide are analyzed theoretically and numerically. The structure of the paper is as follows: chapter one is a brief introduction to the optical waveguide and its nonlinear effect. The application of sulfur optical waveguide is analyzed, and the unique optical properties of sulfur glass are introduced. Then, the research content and significance of this paper are illustrated with the characteristics of sulfur system. In chapter 2, the basic theory of optical waveguide is introduced. By using the classical Maxwell equations, the wave equation satisfying the light wave propagation is derived, and the transmission equation of the optical pulse transmission is further analyzed. The generalized nonlinear Schrodinger equation is derived by further study. Finally, the boundary conditions required for the analysis of optical waveguides are introduced. In chapter 3, two types of optical waveguides based on sulfur materials are introduced. The dispersion characteristics and effective area of sulfur optical waveguide are studied by finite difference method, and its nonlinear coefficient is analyzed. A flat low dispersion curve is obtained. Finally, the phase matching conditions in the degenerate four-wave mixing process are analyzed. In Chapter 4th, on the basis of Chapter 3, we design a novel structure of as _ 2s _ 3s _ 3 for a ridge sulfur glass waveguide. This waveguide structure can be used in both quasi-te and quasi-TM modes. For te and TM modes, UWB with two ZDW and low dispersion curves are obtained by dispersion modulation. We have calculated the effective area and nonlinear coefficients of the two modes, and studied the output characteristics of the supercontinuum spectrum when pumped by ultrashort pulses in this waveguide structure. Chapter 5th is a summary of the work in this paper. The defects of the research work and the unsolved problems are pointed out.
【學(xué)位授予單位】：寧波大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TN252

【參考文獻(xiàn)】

相關(guān)期刊論文 前4條

1 頓愛歡;魏勁松;干福熹;;Laser direct writing pattern structures on AgInSbTe phase change thin film[J];Chinese Optics Letters;2011年08期

2 曹瑩;聶秋華;徐鐵峰;戴世勛;沈祥;王訓(xùn)四;;Ge_(28)Sb_6S_((66-x))Se_x玻璃系統(tǒng)光學(xué)特性與結(jié)構(gòu)[J];光子學(xué)報(bào);2010年07期

3 劉啟明;何漩;干福熹;錢士雄;;硫系非晶半導(dǎo)體薄膜中的超快光Kerr效應(yīng)[J];物理學(xué)報(bào);2009年02期

4 劉啟明,干福熹;GeSe_2非晶半導(dǎo)體薄膜中光致結(jié)構(gòu)及性能變化[J];光學(xué)學(xué)報(bào);2002年05期

相關(guān)碩士學(xué)位論文 前2條

1 鐘會(huì)清;光學(xué)相干層析成像技術(shù)在生物醫(yī)學(xué)中的應(yīng)用[D];華南師范大學(xué);2007年

2 朱毅;光學(xué)相干層析成像系統(tǒng)控制與圖像處理研究[D];暨南大學(xué);2007年

，

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