本文選題：紅外 + 硫系玻璃��； 參考：《寧波大學(xué)》2015年碩士論文

【摘要】：光子晶體光纖(Photonic Crystal Fiber,簡稱PCF)是以光子晶體的基本特性為基礎(chǔ)而發(fā)展起來的一種新型光纖。由于它對在光纖中傳導(dǎo)的光線具有不同于傳統(tǒng)芯包層結(jié)構(gòu)光纖的非常靈活的限制能力,PCF正逐步應(yīng)用于光纖通信,光纖傳感,光纖激光器,非線性光器件等諸多新興研究領(lǐng)域。折射率引導(dǎo)型光子晶體光纖(Refractive Index Guiding PCF)是一種包層氣孔輔助調(diào)節(jié)型光纖,通過對這類光纖包層中空氣孔的數(shù)量和分布進行調(diào)節(jié)就可以降低包層相對于纖芯的折射率,從而實現(xiàn)全內(nèi)反射傳輸條件。折射率引導(dǎo)型PCF可以被認為是通常意義下的微結(jié)構(gòu)光纖的一個分支,它不單是利用芯包層的折射率差值來實現(xiàn)光的傳導(dǎo),更為重要的意義是它可以通過靈活的結(jié)構(gòu)設(shè)計來控制光的合理傳導(dǎo)。硫系玻璃通常是以硫、硒、碲三種硫族元素為基質(zhì),再加入砷、鍺、鎵等化學(xué)元素組成的玻璃材料。硫系玻璃具有優(yōu)良的紅外透過特性,與硫系玻璃光纖相關(guān)的研究一直備受關(guān)注。本論文研究了折射率引導(dǎo)型硫系PCF的制備方法和相關(guān)的光纖光學(xué)性能,主要論述了以下幾個方面:(1)對比較成熟的Se基玻璃進行了改良,通過碘摻雜制備了一類新型硫系玻璃材料Ge20Sb5Se75-xIx(x=0,5,10,15,20 at%)。這類玻璃通過降低Se基玻璃的弱吸收尾強度,非常有效地提高了紅外透過率。利用拉曼光譜揭示了該玻璃體系隨碘含量的提高其內(nèi)部玻璃結(jié)構(gòu)的變化機理。利用其他相關(guān)的測試方法,我們還對該玻璃體系的物理,熱學(xué)以及光學(xué)特性進行了深入分析。在相關(guān)研究的基礎(chǔ)上,提出了一種可行的蒸餾提純工藝并成功地對Ge-Sb-Se-I玻璃進行了提純,經(jīng)過提純,非常有效地降低了與Ge-O、H2O、Se-H相關(guān)的雜質(zhì)吸收峰。(2)硫系光纖預(yù)制棒的加熱拉絲工藝是確保PCF制備成功的必備環(huán)節(jié)。在硫系預(yù)制棒加熱拉絲工藝方面,利用提純后的Ge20Sb5Se55I20玻璃研究了裸絲硫系光纖的拉制工藝并對Ge20Sb5Se55I20紅外光纖進行了相關(guān)測試。研究結(jié)果表明:與Ge-Sb-Se玻璃光纖相比,Ge-Sb-Se-I光纖的有效紅外傳輸損耗有了大幅度的降低。Ge20Sb5Se55I20光纖在3.3μm處可以得到最低紅外傳輸損耗3.5d B/m,而Ge20Sb5Se75光纖最低損耗則高達48d B/m。(3)硫系PCF制備的難點在于PCF預(yù)制棒的制備工藝。在光纖預(yù)制棒制備工藝方面,提出了一種先進的預(yù)制棒制備方法-隔離擠壓法,從而為擠壓制備硫系PCF空心玻璃管單元打下了基礎(chǔ)。使用這種方法制得了Ge-Sb-Se/Ge-Sb-S硫系玻璃預(yù)制棒,在整個160mm長度范圍內(nèi)預(yù)制棒均能保持纖芯/包層尺寸比例的一致性。經(jīng)過預(yù)制棒加熱拉絲法制成的紅外硫系光纖,常見的典型結(jié)構(gòu)缺陷(氣泡,裂紋,芯徑變化)被有效去除。使用相關(guān)光學(xué)儀器,對光纖傳輸損耗,彎曲損耗以及其他光學(xué)特性進行了表征。(4)在利用多極法優(yōu)化設(shè)計光子晶體光纖結(jié)構(gòu)的基礎(chǔ)上,充分結(jié)合擠壓和堆積兩種PCF預(yù)制棒制備方法的優(yōu)點,提出了一種基于“擠壓-堆積”的新型折射率引導(dǎo)型PCF預(yù)制棒制備方法,利用As2S3玻璃制備了三層孔環(huán)結(jié)構(gòu)硫系PCF。通過理論模擬分析得出了該光纖的色散特性、零色散點和非線性系數(shù),測試了1550nm近紅外光纖激光在該光纖中的傳輸效果和纖芯光斑能量分布,利用該光斑測試驗證了該光纖在紅外波段的光能傳輸局部限制能力。
[Abstract]:Photonic Crystal Fiber (PCF) is a new type of fiber developed on the basis of the basic characteristics of photonic crystals. Because it has a very flexible ability to restrict the light transmission in the optical fiber from the traditional core cladding fiber, PCF is gradually applied to optical fiber communication, fiber sensing, fiber excitation. The refractive index guided photonic crystal fiber (Refractive Index Guiding PCF) is a clad hole auxiliary regulating fiber. By adjusting the number and distribution of hollow pores in this kind of cladding, the refractive index of the cladding relative to the core can be reduced so as to realize all inside. Reflection transmission conditions. The refractive index guided PCF can be considered as a branch of the usual microstructural fiber. It is not only the use of the refractive index difference of the core layer to achieve light transmission. It is more important that it can control the reasonable transmission of light by flexible structural design. Sulfur, selenium and tellurium are usually used in sulphur system glass. Three kinds of sulfur elements are used as matrix, and then glass materials such as arsenic, germanium, gallium and other chemical elements are added. Sulfur based glass has excellent infrared transmittance. The research on sulfur based glass fiber has been paid much attention. In this paper, the preparation methods and optical fiber optical properties of the refractive index guided sulfur system PCF are studied and the following are discussed. Several aspects: (1) the mature Se based glass was improved and a new type of sulfur based glass material Ge20Sb5Se75-xIx (x=0,5,10,15,20 at%) was prepared by iodine doping. This kind of glass improved the infrared penetration rate very effectively by reducing the weak absorption tail strength of the Se based glass. In addition, the physical, thermal and optical properties of the glass system were further analyzed by other related testing methods. On the basis of the related research, a feasible distillation process was proposed and the Ge-Sb-Se-I glass was successfully purified and purified. The absorption peaks related to Ge-O, H2O and Se-H are often effectively reduced. (2) the heating and drawing process of the sulfur based optical fiber preform is a necessary link to ensure the success of the PCF preparation. In the heating and drawing process of the sulfur system preform, the drawing process of the naked silk sulfur system fiber and the Ge20Sb5Se55I20 infrared light are studied by the purified Ge20Sb5Se55I20 glass. The results show that compared with the Ge-Sb-Se glass fiber, the effective infrared transmission loss of the Ge-Sb-Se-I fiber has a significant reduction in the.Ge20Sb5Se55I20 fiber at 3.3 mu m, the lowest infrared transmission loss 3.5D B/m, while the minimum loss of the Ge20Sb5Se75 fiber is as high as 48D B/m. (3) sulfur system PCF preparation. In the preparation process of PCF preform. In the preparation of optical fiber preform, an advanced preform preparation method, isolation extrusion method, was put forward to prepare the sulfur based PCF hollow glass tube unit by extrusion. The Ge-Sb-Se/Ge-Sb-S sulphur glass preform was prepared by this method and prefabricated in the whole range of 160mm length. The rod can keep the consistency of the size ratio of the core / cladding. The common typical structural defects (bubbles, cracks, core diameter changes) are effectively removed by the prefabricated rod heating and drawing. The optical fiber transmission loss, bending loss and other optical properties are characterized by using the related optical instruments. (4) the use of multipoles is used. On the basis of optimizing the structure of photonic crystal fiber and combining the advantages of extrusion and accumulation of two kinds of PCF preform, a new method of preparing a new type of PCF preform based on "extrusion and accumulation" is proposed. The three layers of Kong Huan structure sulfur system PCF. is prepared by theoretical simulation and analysis by using As2S3 glass. The dispersion characteristic, zero dispersion point and nonlinear coefficient of the fiber are tested. The transmission effect of 1550nm near infrared optical fiber laser in this fiber and the energy distribution of the core light spot are tested. The local limiting ability of the optical fiber in the infrared wave band is verified by the light spot test.

【學(xué)位授予單位】：寧波大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TN253

【參考文獻】

相關(guān)期刊論文 前2條

1 賈光明,賈東方,李世忱;高非線性光纖及其應(yīng)用[J];光通信研究;2003年01期

2 王華;楊光;許銀生;章向華;顧真安;陳國榮;;新型GeSe_2-Ga_2Se_3-KI系統(tǒng)硫鹵玻璃形成的研究(英文)[J];硅酸鹽學(xué)報;2007年07期

，

本文編號：1891228