【摘要】：自1996年第一根光子晶體光纖誕生以來,光子晶體光纖以其優(yōu)越的性能引起了人們越來越多研究興趣。高雙折射和零色散光纖在通信、傳感等領(lǐng)域都有著廣泛的應(yīng)用,與傳統(tǒng)光纖分束器相比,基于光子晶體光纖的偏振分束器能夠提供更好的消光比和耦合長度。本文設(shè)計了兩種具有高雙折射和零色散光子晶體光纖偏振分束器,用有限元法對所設(shè)計的光子晶體光纖的傳輸特性進(jìn)行了系統(tǒng)的分析研究。論文的主要內(nèi)容如下:首先,結(jié)合光子晶體光纖的概念和發(fā)展現(xiàn)狀,分析總結(jié)了光子晶體光纖在通信技術(shù)、激光器、濾波器、傳感器等方面的應(yīng)用,對光子晶體光纖選擇不同基質(zhì)材料時的優(yōu)缺點進(jìn)行了比較。其次,以麥克斯韋方程為基礎(chǔ),對光子晶體光纖的幾個典型參量進(jìn)行了介紹并對光纖的耦合模方程進(jìn)行了推導(dǎo),分析了對光子晶體光纖模式特性進(jìn)行數(shù)值模擬時常用方法的優(yōu)缺點。最后,設(shè)計了兩種結(jié)構(gòu)簡單、在通信波段同時具有高雙折射和零色散值、具有很好的偏振分束性能的光子晶體光纖:一種是以石英為背景材料,空氣孔呈三角形排列,該光纖在波長1310nm處具有良好的雙折射、色散和分束特性;另一種是以碲玻璃為背景材料,空氣孔呈矩形排列,在波長1550nm處具有良好的雙折射值、色散值和偏振分束特性。本文設(shè)計的光子晶體光纖結(jié)構(gòu)簡單,在多個方面同時具有良好的性能,可以應(yīng)用在通信系統(tǒng)、保偏系統(tǒng)以及激光器、偏振分束器等光學(xué)器件中,將會具有很好的應(yīng)用前景。
[Abstract]:Since the birth of the first photonic crystal fiber (PCF) in 1996, photonic crystal fiber (PCF) has attracted more and more attention due to its superior performance. High birefringence and zero dispersion fiber are widely used in communication, sensing and other fields. Compared with traditional fiber splitter, polarization splitter based on photonic crystal fiber can provide better extinction ratio and coupling length. In this paper, two kinds of polarization beam splitters with high birefringence and zero dispersion photonic crystal fiber are designed. The transmission characteristics of the designed photonic crystal fiber are analyzed by finite element method. The main contents of this thesis are as follows: firstly, the application of photonic crystal fiber in communication technology, laser, filter, sensor and so on is analyzed and summarized according to the concept and development status of photonic crystal fiber. The advantages and disadvantages of photonic crystal fiber (PCF) in selecting different matrix materials are compared. Secondly, on the basis of Maxwell equation, several typical parameters of photonic crystal fiber are introduced, and the coupled mode equation of photonic crystal fiber is deduced. The advantages and disadvantages of numerical simulation of photonic crystal fiber (PCF) mode characteristics are analyzed. Finally, two kinds of photonic crystal fibers with simple structure, high birefringence and zero dispersion at the same time, and good polarization and beam splitting performance are designed. One is using quartz as the background material, and the air holes are arranged in triangles. The fiber has good birefringence, dispersion and beam splitting properties at wavelength 1310nm. The other is based on tellurium glass with rectangular air holes and good birefringence, dispersion and polarization beam splitting properties at wavelength 1550nm. The photonic crystal fiber designed in this paper has simple structure and good performance in many aspects. It can be used in communication system, polarization-maintaining system, laser, polarization beam splitter and other optical devices, and will have a good application prospect.
【學(xué)位授予單位】：燕山大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TN253

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本文編號：2462740