本文主要研究内容
作者马任德（2019）在《新型光纤偏振器及干涉仪设计与应用研究》一文中研究指出：光纤偏振器是一种基础光纤无源器件。自上世纪80年代至今,很多高性能的光纤偏振器已经被研制出来。然而传统的光纤偏振器具有固定的偏振方向和消光比,它们通常作为辅助器件被用于光纤光学系统,作为敏感器件的报道非常少见。设计一种偏振度和偏振方向连续可调的光纤偏振器,并把其作为敏感器件开展应用研究,具有重要意义。磁流体是一种新型功能材料,具有多种磁光特性,可实现对光偏振态的动态调控。本文基于磁流体设计可调光纤偏振器,并尝试探索其应用领域。光纤马赫-曾德干涉仪以光纤为传输介质搭建光路,结构简单,操作灵活,被广泛应用于传感器设计。然而,其制作和应用仍然面临许多障碍,例如光谱复杂、分辨率低、再现性差、操作难度高、信号采集系统昂贵等。为解决这些难题,本文设计一种基于宽带光源的分波前光纤干涉仪,并把其应用于折射率测量。此外,本文还开发一种激光干涉仪的实时正交解调方案,用于相位解包裹,实现高精度距离测量。具体研究内容如下:1.基于磁流体与微纳光纤的光纤偏振器设计。在微纳光纤表面具有很强的三维轴对称倏逝波,便于从各个方向对微纳光纤中传播的光波进行调制。本文将微纳光纤浸入磁流体,并沿垂直于光纤方向施加调制磁场,设计一种在线可调光纤偏振器。偏振调制原理是基于施加磁场后磁流体的磁光二向色性,及磁性纳米颗粒在微纳光纤周围的非圆对称分布。该可调光纤偏振器可以实现对光偏振度和偏振方向的连续调制。研究发现,较细的微纳光纤虽然具有较大的插入损耗,但它能够产生较大的光偏振度;施加某些强度的磁场后,光偏振度的增加会持续很长一段时间,然后达到磁饱和,单纯定义磁流体的饱和磁场没有意义;高浓度的磁流体,以及强磁场,具有强的光偏振调制能力,但是会引入更大的光功率损耗。当磁场方向从0o变化到360o时,光纤偏振调制器显示出很好的方向响应。2.基于磁流体与D形光纤的光纤偏振器设计。由于微纳光纤的脆弱性,导致其易碎、易断,操作难度大,难以重复利用。相对于微纳光纤,D形光纤更具鲁棒性。在D形光纤抛光面上也有很强的倏逝波,便于对光的偏振态进行调制。本文将D形光纤浸入磁流体,并施加平行于光纤抛光表面的磁场,设计一种在线鲁棒光纤偏振器。理论分析与实验结果都证明磁流体的磁光二向色性对D形光纤的光偏振调制起关键作用。当磁流体膜被放置在外磁场中固化时,利用显微镜可以观察到由磁性纳米颗粒簇组成的规则线。在光偏振调制过程中,平行于磁场偏振的倏逝场比其正交分量具有更大的损耗。通过研究影响光偏振调制的因素发现:具有宽抛光面的D形光纤的偏振易于调制;高浓度磁流体、大磁场具有强的能力来调制D形光纤偏振;此外还通过实验获得了光偏振调制的时间响应。3.基于磁流体与微纳光纤的矢量磁场传感器设计。把微纳光纤浸入磁流体,基于光偏振态的检测,设计一种矢量磁场传感器。研究发现,如果磁场强度较大,则光偏振调制的响应时间较长,不适合时变磁场的测量。只有当待测磁场强度满足特定阈值条件时,光偏振调制才有较好的瞬态响应。在磁场强度满足检测阈值的条件下,磁滞对磁场传感器的影响可以忽略。磁场传感器对磁场方向具有良好的取向响应。但是需要指出,在磁场方向检测过程中,存在180o的不确定性。因为该磁场传感器不能区分磁场方向。与磁场强度传感不同,如果检偏器旋转速度足够快,磁场方向的测量不受检测阈值的限制。矢量磁场传感器的信号分析系统由一个偏振分束器和两个光电探测器组成,无需精密且昂贵的光谱分析设备,结构简单,成本低廉。4.基于磁流体与微纳光纤的免标记生物传感器设计。蛋白质可以诱导功能化磁性纳米颗粒的自组装,形成较大的团簇。该团簇在基液中的移动速度小于单个磁性纳米颗粒,当施加或去除外磁场时,磁流体对微纳光纤的偏振调制响应时间将会变长。本文基于功能化磁流体对微纳光纤偏振调制响应时间的变化,设计一种免标记光纤生物传感器。以牛血清蛋白为例开展生物传感实验。偏振调制得到的最大偏振度pmax,及最大和最小偏振度之差Δp,都随着牛血清蛋白浓度的增加而单调减小。可以通过检测pmax和Δp来获取牛血清蛋白的浓度。由于无需对微纳光纤表面进行功能化,可极大降低实验操作难度,简化生物传感过程。信号采集系统无需借助昂贵的光谱分析设备,成本低廉,响应速度快。5.分波前鲁棒光纤马赫-曾德干涉仪研究。在两个对准的格林透镜光纤准直器之间构建一个空腔;把一片PET膜插入该空腔,从第一个光纤准直器出射的高斯光束的波前被分成两部分;第二个光纤准直器会聚该高斯光束进入单模光纤,构造出具有鲁棒性的分波前光纤马赫-曾德干涉仪。干涉仪的有效光谱宽度大于390nm,足以构建敏感光纤传感器。COMSOL Multiphysics仿真和实验结果表明,该马赫-曾德干涉仪基于多光束干涉。由于插入损耗很小,当光谱仪的采样精度为0.1nm时,仍然获得了稳定性、重复性很好的干涉条纹。从而确保基于该干涉仪的光纤传感器具有高分辨率。当盐水的盐度增加千分之一时,干涉仪条纹中,两个相邻的谐振波长分别移动-0.78nm、-0.81nm,显示出高的灵敏度。该干涉仪可被广泛用于检测物理,化学或生物量。6.基于拐点检索进行相位解包裹的激光测距仪研究。提出一种基于波长扫描干涉仪的实时距离测量方案。基于总结得到的两个波形变换规律,把干涉信号转换成初步变换信号;然后利用不连续点判断法、相邻零点距离判断法,这两种互补的方法,检索干涉信号的拐点;基于初步变换信号及检索到的拐点,构造正交信号。用正交解调算法解调相移之后,根据中心波长及波长调制深度计算待测距离。当测量毫米量级的距离时,测量结果在一小时内波动约为微米量级。相比于PGC解调方案,本方案的测量复杂性和成本都极大降低,同时仍然可以获得理想的测量结果。
Abstract
guang qian pian zhen qi shi yi chong ji chu guang qian mo yuan qi jian 。zi shang shi ji 80nian dai zhi jin ,hen duo gao xing neng de guang qian pian zhen qi yi jing bei yan zhi chu lai 。ran er chuan tong de guang qian pian zhen qi ju you gu ding de pian zhen fang xiang he xiao guang bi ,ta men tong chang zuo wei fu zhu qi jian bei yong yu guang qian guang xue ji tong ,zuo wei min gan qi jian de bao dao fei chang shao jian 。she ji yi chong pian zhen du he pian zhen fang xiang lian xu ke diao de guang qian pian zhen qi ,bing ba ji zuo wei min gan qi jian kai zhan ying yong yan jiu ,ju you chong yao yi yi 。ci liu ti shi yi chong xin xing gong neng cai liao ,ju you duo chong ci guang te xing ,ke shi xian dui guang pian zhen tai de dong tai diao kong 。ben wen ji yu ci liu ti she ji ke diao guang qian pian zhen qi ,bing chang shi tan suo ji ying yong ling yu 。guang qian ma he -ceng de gan she yi yi guang qian wei chuan shu jie zhi da jian guang lu ,jie gou jian chan ,cao zuo ling huo ,bei an fan ying yong yu chuan gan qi she ji 。ran er ,ji zhi zuo he ying yong reng ran mian lin hu duo zhang ai ,li ru guang pu fu za 、fen bian lv di 、zai xian xing cha 、cao zuo nan du gao 、xin hao cai ji ji tong ang gui deng 。wei jie jue zhe xie nan ti ,ben wen she ji yi chong ji yu kuan dai guang yuan de fen bo qian guang qian gan she yi ,bing ba ji ying yong yu she she lv ce liang 。ci wai ,ben wen hai kai fa yi chong ji guang gan she yi de shi shi zheng jiao jie diao fang an ,yong yu xiang wei jie bao guo ,shi xian gao jing du ju li ce liang 。ju ti yan jiu nei rong ru xia :1.ji yu ci liu ti yu wei na guang qian de guang qian pian zhen qi she ji 。zai wei na guang qian biao mian ju you hen jiang de san wei zhou dui chen shu shi bo ,bian yu cong ge ge fang xiang dui wei na guang qian zhong chuan bo de guang bo jin hang diao zhi 。ben wen jiang wei na guang qian jin ru ci liu ti ,bing yan chui zhi yu guang qian fang xiang shi jia diao zhi ci chang ,she ji yi chong zai xian ke diao guang qian pian zhen qi 。pian zhen diao zhi yuan li shi ji yu shi jia ci chang hou ci liu ti de ci guang er xiang se xing ,ji ci xing na mi ke li zai wei na guang qian zhou wei de fei yuan dui chen fen bu 。gai ke diao guang qian pian zhen qi ke yi shi xian dui guang pian zhen du he pian zhen fang xiang de lian xu diao zhi 。yan jiu fa xian ,jiao xi de wei na guang qian sui ran ju you jiao da de cha ru sun hao ,dan ta neng gou chan sheng jiao da de guang pian zhen du ;shi jia mou xie jiang du de ci chang hou ,guang pian zhen du de zeng jia hui chi xu hen chang yi duan shi jian ,ran hou da dao ci bao he ,chan chun ding yi ci liu ti de bao he ci chang mei you yi yi ;gao nong du de ci liu ti ,yi ji jiang ci chang ,ju you jiang de guang pian zhen diao zhi neng li ,dan shi hui yin ru geng da de guang gong lv sun hao 。dang ci chang fang xiang cong 0obian hua dao 360oshi ,guang qian pian zhen diao zhi qi xian shi chu hen hao de fang xiang xiang ying 。2.ji yu ci liu ti yu Dxing guang qian de guang qian pian zhen qi she ji 。you yu wei na guang qian de cui ruo xing ,dao zhi ji yi sui 、yi duan ,cao zuo nan du da ,nan yi chong fu li yong 。xiang dui yu wei na guang qian ,Dxing guang qian geng ju lu bang xing 。zai Dxing guang qian pao guang mian shang ye you hen jiang de shu shi bo ,bian yu dui guang de pian zhen tai jin hang diao zhi 。ben wen jiang Dxing guang qian jin ru ci liu ti ,bing shi jia ping hang yu guang qian pao guang biao mian de ci chang ,she ji yi chong zai xian lu bang guang qian pian zhen qi 。li lun fen xi yu shi yan jie guo dou zheng ming ci liu ti de ci guang er xiang se xing dui Dxing guang qian de guang pian zhen diao zhi qi guan jian zuo yong 。dang ci liu ti mo bei fang zhi zai wai ci chang zhong gu hua shi ,li yong xian wei jing ke yi guan cha dao you ci xing na mi ke li cu zu cheng de gui ze xian 。zai guang pian zhen diao zhi guo cheng zhong ,ping hang yu ci chang pian zhen de shu shi chang bi ji zheng jiao fen liang ju you geng da de sun hao 。tong guo yan jiu ying xiang guang pian zhen diao zhi de yin su fa xian :ju you kuan pao guang mian de Dxing guang qian de pian zhen yi yu diao zhi ;gao nong du ci liu ti 、da ci chang ju you jiang de neng li lai diao zhi Dxing guang qian pian zhen ;ci wai hai tong guo shi yan huo de le guang pian zhen diao zhi de shi jian xiang ying 。3.ji yu ci liu ti yu wei na guang qian de shi liang ci chang chuan gan qi she ji 。ba wei na guang qian jin ru ci liu ti ,ji yu guang pian zhen tai de jian ce ,she ji yi chong shi liang ci chang chuan gan qi 。yan jiu fa xian ,ru guo ci chang jiang du jiao da ,ze guang pian zhen diao zhi de xiang ying shi jian jiao chang ,bu kuo ge shi bian ci chang de ce liang 。zhi you dang dai ce ci chang jiang du man zu te ding yu zhi tiao jian shi ,guang pian zhen diao zhi cai you jiao hao de shun tai xiang ying 。zai ci chang jiang du man zu jian ce yu zhi de tiao jian xia ,ci zhi dui ci chang chuan gan qi de ying xiang ke yi hu lve 。ci chang chuan gan qi dui ci chang fang xiang ju you liang hao de qu xiang xiang ying 。dan shi xu yao zhi chu ,zai ci chang fang xiang jian ce guo cheng zhong ,cun zai 180ode bu que ding xing 。yin wei gai ci chang chuan gan qi bu neng ou fen ci chang fang xiang 。yu ci chang jiang du chuan gan bu tong ,ru guo jian pian qi xuan zhuai su du zu gou kuai ,ci chang fang xiang de ce liang bu shou jian ce yu zhi de xian zhi 。shi liang ci chang chuan gan qi de xin hao fen xi ji tong you yi ge pian zhen fen shu qi he liang ge guang dian tan ce qi zu cheng ,mo xu jing mi ju ang gui de guang pu fen xi she bei ,jie gou jian chan ,cheng ben di lian 。4.ji yu ci liu ti yu wei na guang qian de mian biao ji sheng wu chuan gan qi she ji 。dan bai zhi ke yi you dao gong neng hua ci xing na mi ke li de zi zu zhuang ,xing cheng jiao da de tuan cu 。gai tuan cu zai ji ye zhong de yi dong su du xiao yu chan ge ci xing na mi ke li ,dang shi jia huo qu chu wai ci chang shi ,ci liu ti dui wei na guang qian de pian zhen diao zhi xiang ying shi jian jiang hui bian chang 。ben wen ji yu gong neng hua ci liu ti dui wei na guang qian pian zhen diao zhi xiang ying shi jian de bian hua ,she ji yi chong mian biao ji guang qian sheng wu chuan gan qi 。yi niu xie qing dan bai wei li kai zhan sheng wu chuan gan shi yan 。pian zhen diao zhi de dao de zui da pian zhen du pmax,ji zui da he zui xiao pian zhen du zhi cha Δp,dou sui zhao niu xie qing dan bai nong du de zeng jia er chan diao jian xiao 。ke yi tong guo jian ce pmaxhe Δplai huo qu niu xie qing dan bai de nong du 。you yu mo xu dui wei na guang qian biao mian jin hang gong neng hua ,ke ji da jiang di shi yan cao zuo nan du ,jian hua sheng wu chuan gan guo cheng 。xin hao cai ji ji tong mo xu jie zhu ang gui de guang pu fen xi she bei ,cheng ben di lian ,xiang ying su du kuai 。5.fen bo qian lu bang guang qian ma he -ceng de gan she yi yan jiu 。zai liang ge dui zhun de ge lin tou jing guang qian zhun zhi qi zhi jian gou jian yi ge kong qiang ;ba yi pian PETmo cha ru gai kong qiang ,cong di yi ge guang qian zhun zhi qi chu she de gao si guang shu de bo qian bei fen cheng liang bu fen ;di er ge guang qian zhun zhi qi hui ju gai gao si guang shu jin ru chan mo guang qian ,gou zao chu ju you lu bang xing de fen bo qian guang qian ma he -ceng de gan she yi 。gan she yi de you xiao guang pu kuan du da yu 390nm,zu yi gou jian min gan guang qian chuan gan qi 。COMSOL Multiphysicsfang zhen he shi yan jie guo biao ming ,gai ma he -ceng de gan she yi ji yu duo guang shu gan she 。you yu cha ru sun hao hen xiao ,dang guang pu yi de cai yang jing du wei 0.1nmshi ,reng ran huo de le wen ding xing 、chong fu xing hen hao de gan she tiao wen 。cong er que bao ji yu gai gan she yi de guang qian chuan gan qi ju you gao fen bian lv 。dang yan shui de yan du zeng jia qian fen zhi yi shi ,gan she yi tiao wen zhong ,liang ge xiang lin de xie zhen bo chang fen bie yi dong -0.78nm、-0.81nm,xian shi chu gao de ling min du 。gai gan she yi ke bei an fan yong yu jian ce wu li ,hua xue huo sheng wu liang 。6.ji yu guai dian jian suo jin hang xiang wei jie bao guo de ji guang ce ju yi yan jiu 。di chu yi chong ji yu bo chang sao miao gan she yi de shi shi ju li ce liang fang an 。ji yu zong jie de dao de liang ge bo xing bian huan gui lv ,ba gan she xin hao zhuai huan cheng chu bu bian huan xin hao ;ran hou li yong bu lian xu dian pan duan fa 、xiang lin ling dian ju li pan duan fa ,zhe liang chong hu bu de fang fa ,jian suo gan she xin hao de guai dian ;ji yu chu bu bian huan xin hao ji jian suo dao de guai dian ,gou zao zheng jiao xin hao 。yong zheng jiao jie diao suan fa jie diao xiang yi zhi hou ,gen ju zhong xin bo chang ji bo chang diao zhi shen du ji suan dai ce ju li 。dang ce liang hao mi liang ji de ju li shi ,ce liang jie guo zai yi xiao shi nei bo dong yao wei wei mi liang ji 。xiang bi yu PGCjie diao fang an ,ben fang an de ce liang fu za xing he cheng ben dou ji da jiang di ,tong shi reng ran ke yi huo de li xiang de ce liang jie guo 。
论文参考文献
论文详细介绍
论文作者分别是来自曲阜师范大学的马任德，发表于刊物曲阜师范大学2019-10-09论文，是一篇关于光纤偏振器论文,磁流体论文,微纳光纤论文,形光纤论文,磁场传感器论文,免标记生物传感器论文,分波前光纤干涉仪论文,相位解包裹论文,激光测距仪论文,曲阜师范大学2019-10-09论文的文章。本文可供学术参考使用，各位学者可以免费参考阅读下载，文章观点不代表本站观点，资料来自曲阜师范大学2019-10-09论文网站，若本站收录的文献无意侵犯了您的著作版权，请联系我们删除。
标签：光纤偏振器论文; 磁流体论文; 微纳光纤论文; 形光纤论文; 磁场传感器论文; 免标记生物传感器论文; 分波前光纤干涉仪论文; 相位解包裹论文; 激光测距仪论文; 曲阜师范大学2019-10-09论文;