發(fā)布時間：2018-08-05 13:52

【摘要】：隨著科技的進步與發(fā)展,產品向小型化、輕量化發(fā)展的趨勢變的越來越明顯。在光學領域,對于常用的偏振濾波器來說只對很小的頻率范圍或某一入射角度范圍有效,而且其體積比較大、不利于實現(xiàn)光學集成。在環(huán)境水質檢測與醫(yī)療診斷等方面如何實現(xiàn)實對被檢測物的實時在線檢測及其傳感器的小型化也是人們一直在追求的目標。利用光子晶體光纖來制作偏振濾波器或傳感器不僅可以達到體積小、易集成的目的,而且有望在其性能方面實現(xiàn)較大幅度的提升。本文利用有限元方法對基于金屬表面等離子體共振型光子晶體光纖偏振濾波器和傳感器進行數值模擬,在光子晶體光纖偏振濾波器和傳感器的設計過程中,發(fā)現(xiàn)“非對稱因素”的利用是提升其性能的關鍵。論文的主要內容如下:首先,介紹光子晶體光纖的產生背景、在光學領域的重要研究價值以及其最新發(fā)展狀況。其次,在研究金屬填充光子晶體光纖的過程中,利用表面等離激元和表面等離子體共振效應來解釋光纖基質與金屬之間發(fā)生的新奇現(xiàn)象。提出一種填充金屬膜的空氣孔排列呈橢圓形結構的光子晶體光纖偏振濾波器并對其性能進行了分析。再次,進一步設計了幾種不同結構的光子晶體光纖濾波器,充分證明了本文提出的“非對稱因素”對光子晶體光纖器件設計和性能優(yōu)化所產生的重要影響,發(fā)現(xiàn)“非對稱因素”的利用是提升其性能的關鍵。最后,設計了一種有關液體折射率探測的傳感器。數值模擬結果表明本文所設計的傳感器可以將其靈敏度提升至常見傳感器靈敏度的兩倍以上,相應的器件有望對液體實現(xiàn)高靈敏度檢測。本文充分利用“非對稱因素”對光子晶體光纖偏振濾波器和傳感器進行設計和性能優(yōu)化,這對光子晶體光纖的設計和制備具有重要的理論指導意義。
[Abstract]:With the progress and development of science and technology, the trend of product miniaturization and lightweight development is becoming more and more obvious. In the optical field, the polarization filter is only effective for a small frequency range or an angle of incidence range, and its volume is relatively large, which is not conducive to the realization of optical integration. How to realize the real-time on-line detection of the detected object and the miniaturization of the sensor in the aspects of environmental water quality detection and medical diagnosis is also the goal that people have been pursuing all the time. Using photonic crystal fiber to fabricate polarization filter or sensor can not only achieve the goal of small size and easy integration, but also can improve its performance greatly. In this paper, the finite element method is used to simulate the polarization filter and sensor of photonic crystal fiber based on metal surface plasmon resonance. In the process of designing the polarization filter and sensor of photonic crystal fiber, It is found that the use of asymmetric factors is the key to improve its performance. The main contents of this paper are as follows: firstly, the background of photonic crystal fiber (PCF), its important research value in optical field and its latest development are introduced. Secondly, in the process of studying metal-filled photonic crystal fiber, the surface isotherm and surface plasmon resonance effect are used to explain the novel phenomenon between the matrix and metal. A photonic crystal fiber polarization filter with elliptical structure of air holes filled with metal film is proposed and its performance is analyzed. Thirdly, several kinds of photonic crystal fiber filters with different structures are further designed, which fully proves the important influence of the asymmetric factors proposed in this paper on the design and performance optimization of photonic crystal fiber devices. It is found that the use of asymmetric factors is the key to improve its performance. Finally, a sensor for liquid refractive index detection is designed. The numerical simulation results show that the sensor designed in this paper can increase the sensitivity of the sensor to more than twice the sensitivity of common sensors, and the corresponding devices are expected to achieve high sensitivity to liquid detection. In this paper, we make full use of "asymmetric factors" to design and optimize the performance of photonic crystal fiber polarization filters and sensors, which is of great theoretical significance for the design and fabrication of photonic crystal fibers.
【學位授予單位】：燕山大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TP212;TN713

【參考文獻】

相關期刊論文 前1條

1 薛文瑞;郭亞楠;張文梅;;Modified surface plasmonic waveguide formed by nanometric parallel lines[J];Chinese Physics B;2010年01期

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本文編號：2165990