發(fā)布時間：2018-05-25 23:32

  本文選題：熊貓光纖Bragg光柵 + 飛秒激光加工��； 參考：《吉林大學》2017年碩士論文

【摘要】：基于光纖材料的光學元器件,越來越受到大家的關(guān)注。光纖波導作為光學和光通信領(lǐng)域的一員,有著諸多優(yōu)勢,比如對光信號有著極強的束縛作用,尺寸小,質(zhì)量輕等,給光纖波導的廣泛應用提供了條件。根據(jù)制備時的預制棒的不同,光纖有很多種類,有著不一樣的作用。近些年來,人們通過在光纖上進行修飾,或者結(jié)合激光制備方法在其中刻寫結(jié)構(gòu),在傳感和光學集成等領(lǐng)域,大大擴展了光纖的應用背景。在本文中,我們嘗試著在特殊光纖中刻寫光柵結(jié)構(gòu),并對其傳感特性進行探索研究。我們采用的是飛秒激光直寫技術(shù)進行刻寫,經(jīng)過對實驗參數(shù)的不斷摸索,在熊貓型光纖的纖芯處成功刻寫了光纖布拉格光柵(以后統(tǒng)稱:光纖Bragg光柵)。另外,我們嘗試著將光學菲涅爾波帶片結(jié)構(gòu)跟光纖波導材料結(jié)合起來,在大芯徑的多模光纖的纖芯處進行制備,得到了光纖菲涅爾波帶片。經(jīng)過實驗,初步觀察到了結(jié)構(gòu)穩(wěn)定,聚焦效果明顯的光纖元器件�？偨Y(jié)發(fā)現(xiàn),本文主要有兩個方面的內(nèi)容:一、應用飛秒激光直寫技術(shù),刻寫熊貓型光纖Bragg光柵。該方法借鑒了飛秒激光刻寫單模光纖Bragg光柵的制備過程,經(jīng)過不斷調(diào)整實驗參數(shù)發(fā)現(xiàn),當飛秒激光的工作波長為λ=nm800,重復頻率為f=100Hz的情況下,將脈沖能量調(diào)整為50nJ,可以在熊貓型光纖上制備出光纖Bragg光柵,此條件下制備出的光柵反射譜最好。經(jīng)過對其反射譜的觀察,有雙峰反射譜,利用特殊的雙峰結(jié)構(gòu),可以在傳感領(lǐng)域有所作為。文中,初步對其溫度、軸向應力進行傳感探測,并對其雙峰的靈敏度進行研究。二、應用飛秒激光直寫技術(shù),在大芯徑多模光纖內(nèi)部刻寫光纖菲涅爾波帶片。首先,根據(jù)飛秒激光與光纖材料相互作用的機理,論證了在大芯徑多模光纖中進行激光加工的實驗可操作性。然后,根據(jù)菲涅爾波帶片的特征公式,設(shè)計出合理的結(jié)構(gòu)。然后,通過對實驗加工參數(shù)的摸索發(fā)現(xiàn),當飛秒激光的工作波長為λ=nm800,重復頻率為f=2.5kHz的情況下,通過光路中再加一塊倍頻晶體,得到λ=nm400的加工激光,將脈沖能量調(diào)整為48nJ,可以在多模光纖中加工出光纖菲涅爾波帶片。用光學顯微鏡對其加工出的結(jié)構(gòu)進行觀察,發(fā)現(xiàn)這種條件下的結(jié)構(gòu)比較完美。然后,通過觀測系統(tǒng),對其聚焦特性進行研究,聚焦效果明顯。說明了,通過飛秒激光直寫技術(shù)在大芯徑多模光纖中制備出了功能性光學器件,效果良好。
[Abstract]:Optical components based on optical fiber materials have attracted more and more attention. As a member of the field of optics and optical communication, fiber waveguide has many advantages, such as strong binding to optical signal, small size and light mass, which provides conditions for the wide application of optical fiber waveguide. According to the preparation of the precast rod, there are many kinds of optical fiber, has a different role. In recent years, the application background of optical fiber has been greatly expanded by modifying the optical fiber, or combining the laser preparation method to write the structure in it, and in the field of sensing and optical integration. In this paper, we try to write the grating structure in a special fiber and study its sensing characteristics. We use femtosecond laser direct writing technique to write FBG (fiber Bragg grating) at the core of panda fiber. In addition, we try to combine the optical Fresnel band plate structure with the fiber waveguide material to prepare the fiber core of the large-diameter multimode fiber, and obtain the fiber Fresnel band plate. Through the experiment, the optical fiber components with stable structure and obvious focusing effect have been observed. It is found that there are two main contents in this paper: first, using femtosecond laser direct writing technology to write panda fiber Bragg gratings. This method draws lessons from the fabrication process of single-mode fiber Bragg gratings by femtosecond laser. It is found that when the working wavelength of femtosecond laser is 位 nm800 and the repetition rate is f=100Hz, the experimental parameters are adjusted continuously. When the pulse energy is adjusted to 50nJ, the fiber Bragg grating can be fabricated on the panda fiber, and the reflection spectrum of the grating is the best under this condition. Through the observation of its reflection spectrum, there is a double peak reflection spectrum, and the special double peak structure can be used in the sensing field. In this paper, the temperature and axial stress are detected and the sensitivity of the two peaks is studied. Secondly, femtosecond laser direct writing technique is used to write Fresnel band plate in large core diameter multimode fiber. Firstly, according to the mechanism of the interaction between femtosecond laser and fiber material, the feasibility of laser processing in large-core multimode fiber is demonstrated. Then, according to the characteristic formula of Fresnel band plate, a reasonable structure is designed. Then, the experimental processing parameters are explored. When the working wavelength of femtosecond laser is 位 nm800 and the repetition rate is f=2.5kHz, the processing laser of 位 nm400 is obtained by adding a double frequency crystal in the optical path. When the pulse energy is adjusted to 48nJ, the Fresnel band plate can be fabricated in multimode fiber. The structure was observed by optical microscope and it was found that the structure was perfect under this condition. Then, through the observation system, the focusing characteristics are studied, and the focus effect is obvious. The results show that functional optical devices are fabricated by femtosecond laser direct-writing technique in large core diameter multimode optical fiber with good effect.
【學位授予單位】：吉林大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TN253

【相似文獻】

相關(guān)期刊論文 前10條

1 魏赫穎,邢岐榮,張偉力,柴路,戴建明,王清月;飛秒激光在生物醫(yī)學中的應用[J];光電子·激光;2000年06期

2 ;我國高效率太瓦級飛秒激光裝置建成[J];光機電信息;2000年11期

3 王雷劍;張海峰;張驥;徐永生;;飛秒激光系統(tǒng)的運行和改進[J];中國原子能科學研究院年報;2005年00期

4 王亞偉;劉瑩;卜敏;王立峰;;飛秒激光與生物組織作用原理及其應用[J];激光與紅外;2008年01期

5 云中客;;利用飛秒激光粉碎病毒[J];物理;2008年04期

6 狄建科;周明;楊海峰;戴娟;;飛秒激光與生物細胞作用機理及應用[J];激光生物學報;2008年02期

7 何芝君;;飛秒激光在半透明物質(zhì)中的微爆破及應用[J];文山師范高等專科學校學報;2008年03期

8 楊海峰;周明;狄建科;趙恩蘭;蔡蘭;;飛秒激光活細胞微手術(shù)研究[J];光電子.激光;2009年04期

9 ;飛秒激光術(shù)=安全“新視界”?[J];發(fā)明與創(chuàng)新(綜合版);2009年09期

10 王麗;邱建榮;;飛秒激光在生物學領(lǐng)域的應用[J];激光與光電子學進展;2010年01期

相關(guān)會議論文 前10條

1 魏志義;王兆華;田金榮;令維軍;賈玉磊;張軍;韓海年;王鵬;孫敬華;鄭加安;張杰;聶玉昕;;飛秒激光功能擴展及精確控制[A];第六屆全國光學前沿問題研討會論文摘要集[C];2003年

2 曾紹群;;飛秒激光的聲光掃描與神經(jīng)活動觀測[A];2006年全國強場激光物理會議論文集[C];2006年

3 徐楠;吳成印;吳志峰;梁青青;楊宏;龔旗煌;;分子的飛秒激光取向操縱[A];2006年全國強場激光物理會議論文集[C];2006年

4 蔣紅兵;鐘鳳嬌;龔旗煌;;分子取向?qū)︼w秒激光傳輸?shù)挠绊慬A];第八屆全國光學前沿問題討論會論文集[C];2009年

5 魯欣;張U，

本文編號：1935074