發(fā)布時間：2018-05-20 01:20

  本文選題：光子晶體光纖 + 色散　； 參考：《北京郵電大學》2015年碩士論文

【摘要】：光子晶體光纖(Photonic Crystal Fiber, PCF)因結(jié)構(gòu)靈活可調(diào)而擁有普通光纖所不具備的色散特性,利用其截面折射率分布的改變可以實現(xiàn)滿足色散補償光纖的大折射率調(diào)制�；赑CF的色散補償光纖以其優(yōu)異的色散特性是目前PCF的一個重要研究領(lǐng)域。 論文從理論上對雙芯PCF的色散補償原理、大負色散大模場設(shè)計以及在高速通信系統(tǒng)中的應(yīng)用進行了研究。 提出了一種外纖芯由高折射率介質(zhì)組成的雙芯PCF,該結(jié)構(gòu)在耦合波長1.573μm處具有-6700ps/(nm·km)的大負色散,利用此光纖進行色散補償將大幅縮減線路中所需光纖長度及引入的損耗。 利用光纖中孔間距、孔徑、介質(zhì)折射率等不同參量的改變對色散特性產(chǎn)生的具體影響的規(guī)律總結(jié),設(shè)計了一種耦合波長1550nm處有效模場面積36.7gm2、色散系數(shù)-1800ps/(nm·km)的大負色散大模場雙芯PCF,這對有效抑制線路中的非線性效應(yīng)具有重要作用。 論文還通過在光纖外纖芯注入一種折射率隨溫度調(diào)節(jié)而改變的聚合物介質(zhì)實現(xiàn)了動態(tài)色散補償。當聚合物折射率從1.4185增加到1.4190時,色散曲線相位匹配波長從1.585μm移動至1.560μm,整個過程中所有曲線的色散峰值基本維持不變且所有色散系數(shù)均在-100至-800ps/(nm·km)之間,同時,各曲線還將C波段涵蓋并在此帶寬內(nèi)展現(xiàn)了很好的色散平坦特型。
[Abstract]:Photonic Crystal Fiber, PCF) has dispersion characteristics that ordinary fiber does not have because of its flexible and adjustable structure. The large refractive index modulation can be realized by changing the refractive index distribution of photonic crystal fiber. Dispersion compensation fiber based on PCF is an important research field of PCF because of its excellent dispersion characteristics. In this paper, the dispersion compensation principle of dual-core PCF, the design of large negative dispersion and large mode field and its application in high-speed communication system are studied theoretically. In this paper, a dual-core PCF with high refractive index medium is proposed. The structure has a negative dispersion of -6700ps/ NM at the coupling wavelength of 1.573 渭 m. Using the fiber to compensate the dispersion will greatly reduce the length of the fiber and the introduced loss in the circuit. In this paper, we summarize the influence of different parameters, such as hole spacing, aperture and refractive index of the medium, on the dispersion characteristics. An effective mode field area of 36.7m-2 and dispersion coefficient of -1800ps-1 nm km at coupled wavelength 1550nm is designed, which plays an important role in suppressing the nonlinear effect in the circuit. The dynamic dispersion compensation is realized by injecting a polymer medium whose refractive index changes with temperature. When the refractive index of the polymer increases from 1.4185 to 1.4190, the phase matching wavelength of the dispersion curve moves from 1.585 渭 m to 1.560 渭 m, and the dispersion peak value of all the curves remains basically unchanged and all dispersion coefficients range from -100 to -800 ps路 r ~ (-1) nm during the whole process, and at the same time, the phase matching wavelength of the dispersion curve moves from 1.585 渭 m to 1.560 渭 m. The curves also cover the C band and show a good dispersion flat feature in this bandwidth.
【學位授予單位】：北京郵電大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TN253

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本文編號：1912551