本文選題：碲酸鹽微結(jié)構(gòu)光纖 + 超連續(xù)光源　； 參考：《吉林大學(xué)》2015年碩士論文

【摘要】：寬波段全光纖超連續(xù)光源在前沿科學(xué)研究、光通信、環(huán)境監(jiān)測(cè)、醫(yī)療、國(guó)防安全等領(lǐng)域有著重要的應(yīng)用。尤其在國(guó)防安全領(lǐng)域，由于超連續(xù)光源不僅具有寬度可達(dá)數(shù)千納米的光譜，而且具有高的亮度和相干性，因此可對(duì)各類光電探測(cè)器進(jìn)行全譜覆蓋和干擾，實(shí)現(xiàn)超寬波段范圍內(nèi)的光電對(duì)抗。實(shí)現(xiàn)寬波段的超連續(xù)光源是國(guó)際學(xué)術(shù)界和工業(yè)界努力追求的目標(biāo)。目前，基于石英微結(jié)構(gòu)光纖的0.32m波段超連續(xù)光源研究已經(jīng)趨于成熟。進(jìn)一步將超連續(xù)光源波長(zhǎng)拓展到中紅外波段,研制波長(zhǎng)大于2m的中紅外波段超連續(xù)相干光源具有非常重要的意義。 由于石英光纖的透過(guò)窗口相對(duì)較窄（僅覆蓋0.32.5m波段），這限制了它在中紅外波段超連續(xù)光源研制中的應(yīng)用。為了產(chǎn)生中紅外波段超連續(xù)相干光源,國(guó)內(nèi)外研究者們已經(jīng)把目光轉(zhuǎn)向了新型的碲酸鹽、氟化物和硫化物微結(jié)構(gòu)光纖,這些光纖的光學(xué)透過(guò)窗口可覆蓋中紅外波段。其中，由于碲酸鹽微結(jié)構(gòu)光纖具有高的非線性系數(shù)、較好的熱穩(wěn)定性和化學(xué)穩(wěn)定性、相對(duì)較寬的中紅外透過(guò)窗口，因此它有望被用于研制具有實(shí)用化水平的全光纖緊湊型中紅外波段超連續(xù)光源。盡管目前在基于碲酸鹽微結(jié)構(gòu)光纖的超連續(xù)光源研究方面已經(jīng)取得了一定的進(jìn)展，，但在該方面缺乏系統(tǒng)的研究，而且碲酸鹽微結(jié)構(gòu)光纖中的中紅外波段光參量過(guò)程研究幾乎是空白。在攻讀碩士期間，作者在基于碲酸鹽微結(jié)構(gòu)光纖的超連續(xù)光源研究方面進(jìn)行了系統(tǒng)的研究，取得了以下研究結(jié)果。 在理論模擬方面我們進(jìn)行了以下三個(gè)方面的研究工作：（1）研究了光纖的結(jié)構(gòu)對(duì)光纖色散，非線性系數(shù)和有效模場(chǎng)面積等光纖參數(shù)的影響。模擬結(jié)果表明，纖芯和空氣孔尺寸都對(duì)光纖的參數(shù)有著重要影響，光纖的非線性系數(shù)，有效模場(chǎng)面積呈現(xiàn)非單調(diào)變化特性。（2）建立了光纖中光脈沖傳輸?shù)睦碚撃Ｐ�，利用分步傅里葉法對(duì)基于碲酸鹽微結(jié)構(gòu)光纖的超連續(xù)光源產(chǎn)生進(jìn)行了系統(tǒng)的理論模擬，綜合考慮了光纖結(jié)構(gòu)、光纖長(zhǎng)度、色散特性、泵浦激光脈寬、峰值功率等因素，重點(diǎn)討論了泵浦激光峰值功率、脈沖寬度和纖芯直徑對(duì)超連續(xù)光譜產(chǎn)生的影響。模擬結(jié)果表明，對(duì)于波長(zhǎng)為1560nm的飛秒激光泵浦源，實(shí)現(xiàn)寬波段超連續(xù)光譜產(chǎn)生的最佳光纖芯徑約為3.5μm。（3）對(duì)碲酸鹽微結(jié)構(gòu)光纖中的寬帶可調(diào)諧參量光產(chǎn)生進(jìn)行了一些理論探索工作。理論模擬結(jié)果表明，當(dāng)泵浦光波長(zhǎng)為1560nm時(shí)，可以獲得覆蓋2065-2925nm波段的寬調(diào)諧參量光產(chǎn)生；當(dāng)泵浦光波長(zhǎng)為2m時(shí)，可以獲得覆蓋3540-4185nm的寬調(diào)諧參量光產(chǎn)生。 在實(shí)驗(yàn)方面，首先我們用棒管法拉制了具有不同纖芯直徑的碲酸鹽微結(jié)構(gòu)光纖，然后使用1560nm的飛秒脈沖激光泵浦碲酸鹽微結(jié)構(gòu)光纖研究了光纖中超連續(xù)光譜的產(chǎn)生，探索了泵浦激光峰值功率、光纖長(zhǎng)度和纖芯直徑等參數(shù)對(duì)超連續(xù)光譜產(chǎn)生的影響。通過(guò)優(yōu)化實(shí)驗(yàn)參數(shù)，當(dāng)泵浦激光脈寬為1.2ps，平均功率為725mW，光纖長(zhǎng)度為3cm時(shí)，獲得了覆蓋1017-2300nm波段的超連續(xù)光源。
[Abstract]:The wide band all fiber supercontinuous light source has an important application in frontier scientific research, optical communication, environmental monitoring, medical treatment, national defense security and other fields. Especially in the field of national defense security, because the supercontinuous light source not only has the spectrum of thousands of nanometers, but also has high brightness and coherence, it can be carried out to all kinds of photodetectors. Full spectrum coverage and interference to realize the optoelectronic countermeasures in the ultra wide band range. The realization of the ultra continuous light source in the wide band is the goal pursued by the international academic and industrial circles. At present, the research on the 0.32m band supercontinuous light source based on the quartz microstructural fiber has become mature. The mid infrared band supercontinuum coherent light source with wavelength greater than 2m is of great significance.
Because the transmission window of the quartz fiber is relatively narrow (covering only the 0.32.5m band), it restricts its application in the development of the super continuous light source in the middle infrared band. In order to produce the super continuous coherent light source in the middle infrared band, the researchers at home and abroad have turned their eyes to the new tellurate, the fluoride and the sulfide microstructural fiber, these fibers. The optical transmission window can cover the middle infrared band, in which the tellurite microstructural fiber has a high nonlinear coefficient, good thermal stability and chemical stability, and a relatively wide mid infrared window. Therefore, it is expected to be used to develop a compact medium infrared supercontinuous light source with a practical level. At present, some progress has been made in the research of supercontinuous light source based on tellurite microstructural fiber, but there is a lack of systematic research in this respect, and the study of the optical parametric process in the middle infrared band of tellurite microstructural fiber is almost blank. During the period of master's study, the author was based on the supercontinuum based on tellurite microstructural fiber. The research of light source has been systematically studied and the following research results have been achieved.
In the field of theoretical simulation, we have carried out the following three aspects: (1) study the influence of fiber structure on fiber dispersion, nonlinear coefficient and effective mode field area. The simulation results show that the core and air hole size have an important influence on the parameters of the fiber, the nonlinear coefficient of the optical fiber, the effective mode scene. The product presents non monotonic characteristics. (2) a theoretical model of optical pulse transmission in optical fiber is established. A systematic theoretical simulation of the production of supercontinuous light source based on tellurite microstructural fiber is carried out by step Fu Liye method. The optical fiber structure, fiber length, dispersion, pump laser pulse width, peak power and other factors are considered. The effect of the peak power of the pumped laser, the pulse width and the diameter of the core on the generation of the supercontinuum is discussed. The simulation results show that the optimum fiber core diameter of the wide band supercontinuum is about 3.5 mu m. (3) for the generation of the Broadband Tunable Parametric light in the tellurite microstructural fiber for the femtosecond laser pumping source with a wavelength of 1560nm. The theoretical simulation results show that when the wavelength of the pump is 1560nm, the wide tuning parametric light can be generated in the 2065-2925nm band. When the wavelength of the pump is 2m, the wide tuning parametric light can be produced to cover the 3540-4185nm.
In the experiment, we first made the tellurite microstructural fiber with different core diameter with the rod tube Fala. Then we use the 1560nm's femtosecond pulse laser to pump tellurite microstructural fiber to study the generation of the supercontinuum in the optical fiber, and explore the peak power of the pump laser, the length of the fiber and the diameter of the core, and the supercontinuous light. By optimizing the experimental parameters, when the pump laser pulse width is 1.2ps, the average power is 725mW and the fiber length is 3cm, the supercontinuous light source covering the 1017-2300nm band is obtained.
【學(xué)位授予單位】：吉林大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TN253

【共引文獻(xiàn)】

相關(guān)期刊論文 前1條

1 祝清德;王訓(xùn)四;聶秋華;姜晨;朱敏鳴;廖方興;張培全;張培晴;吳越豪;戴世勛;徐鐵峰;陶光明;;紅外硫系光纖傳像束研究進(jìn)展[J];硅酸鹽通報(bào);2014年11期

相關(guān)博士學(xué)位論文 前2條

1 譚勇;光纖中誘導(dǎo)非線性研究[D];長(zhǎng)春理工大學(xué);2013年

2 劉來(lái);特種光纖中的非線性效應(yīng)及其應(yīng)用研究[D];吉林大學(xué);2014年

相關(guān)碩士學(xué)位論文 前1條

1 王濤;全光模數(shù)轉(zhuǎn)換中的時(shí)延補(bǔ)償研究[D];北京郵電大學(xué);2015年

本文編號(hào)：1997370