本文主要研究内容
作者胡波（2019）在《融入随机分布FBG阵列的掺铒光纤激光器研究》一文中研究指出：自光纤随机激光概念被提出以后,诸多研究者对其进行了广泛的研究,各种新型结构光纤随机激光器先后被报道。其中,基于随机分布光栅阵列的掺铒光纤激光器是一种相干型随机激光,具备激射阈值低、线宽窄、波长可调谐等特点。该类激光器工作时,通常有多个模式激发,且相互竞争,导致输出波长跳变,时域不稳定,有必要研究相应的调控手段,有效地规整或控制其输出特性;同时,该类激光器结构的无序特点,也为研究和控制光子局域化和无序体系发光,提供了重要平台,有不少值得深入探索的课题。在上述背景下,本文首先利用注入锁定技术,实现了该类激光器的波长锁定输出。研究发现,注入锁定情况下,激光激射阈值减小到17.32 mW,比系统自由运转时的阈值功率减小了44%。另外,通过扫描注入锁定种子光源的波长,可以通过共振激励,依次激发系统的本征随机激光模式,并抑制模式竞争,实现特定波长模式的可控激射。最后,分析了波长锁定的阈值曲线,结果表明,随着泵浦功率的增加,越来越多的模式被激发,且各模式的平均功率也将增加,系统需要更高的种子光功率来达到特定随机模式的波长注入锁定激射。以上我们实现了一种可应用于无散斑成像、传感等领域的随机激光光源。这项研究也为控制和利用广泛存在于光子无序结构中的激光激射提供了一种有效和通用的方法。除波长锁定外,论文还研究了输出模式锁定及对应的激光脉冲机制。针对系统中的多个本征谐振模式,提出了结合“模式剥离”和饱和吸收的模式锁定方法(即利用非线性偏振旋转效应选择模式,并结合饱和吸收效应压窄脉冲),并基于此在“不变腔长”条件下实现了可调重频的脉冲激光输出。实验中获得了锁模阈值为85 mW的模式锁定激光脉冲输出;通过调节非线性偏振旋转效应,在不改变光纤长度的情况下,获得了三种重频的激光脉冲输出;同时还实现了重频为10.896MHz的二次谐波锁模脉冲输出。这项工作为控制无序体系激光的模式和时域特性开辟了一条新的途径,为激光编码和超快光谱学等应用提供了一种具有灵活脉冲产生能力的强有力的激光光源。这也不同于传统锁模激光器利用外腔调制方式产生可调重频的方法,其是一种完全新型的调控方式。
Abstract
zi guang qian sui ji ji guang gai nian bei di chu yi hou ,zhu duo yan jiu zhe dui ji jin hang le an fan de yan jiu ,ge chong xin xing jie gou guang qian sui ji ji guang qi xian hou bei bao dao 。ji zhong ,ji yu sui ji fen bu guang shan zhen lie de can er guang qian ji guang qi shi yi chong xiang gan xing sui ji ji guang ,ju bei ji she yu zhi di 、xian kuan zhai 、bo chang ke diao xie deng te dian 。gai lei ji guang qi gong zuo shi ,tong chang you duo ge mo shi ji fa ,ju xiang hu jing zheng ,dao zhi shu chu bo chang tiao bian ,shi yu bu wen ding ,you bi yao yan jiu xiang ying de diao kong shou duan ,you xiao de gui zheng huo kong zhi ji shu chu te xing ;tong shi ,gai lei ji guang qi jie gou de mo xu te dian ,ye wei yan jiu he kong zhi guang zi ju yu hua he mo xu ti ji fa guang ,di gong le chong yao ping tai ,you bu shao zhi de shen ru tan suo de ke ti 。zai shang shu bei jing xia ,ben wen shou xian li yong zhu ru suo ding ji shu ,shi xian le gai lei ji guang qi de bo chang suo ding shu chu 。yan jiu fa xian ,zhu ru suo ding qing kuang xia ,ji guang ji she yu zhi jian xiao dao 17.32 mW,bi ji tong zi you yun zhuai shi de yu zhi gong lv jian xiao le 44%。ling wai ,tong guo sao miao zhu ru suo ding chong zi guang yuan de bo chang ,ke yi tong guo gong zhen ji li ,yi ci ji fa ji tong de ben zheng sui ji ji guang mo shi ,bing yi zhi mo shi jing zheng ,shi xian te ding bo chang mo shi de ke kong ji she 。zui hou ,fen xi le bo chang suo ding de yu zhi qu xian ,jie guo biao ming ,sui zhao beng pu gong lv de zeng jia ,yue lai yue duo de mo shi bei ji fa ,ju ge mo shi de ping jun gong lv ye jiang zeng jia ,ji tong xu yao geng gao de chong zi guang gong lv lai da dao te ding sui ji mo shi de bo chang zhu ru suo ding ji she 。yi shang wo men shi xian le yi chong ke ying yong yu mo san ban cheng xiang 、chuan gan deng ling yu de sui ji ji guang guang yuan 。zhe xiang yan jiu ye wei kong zhi he li yong an fan cun zai yu guang zi mo xu jie gou zhong de ji guang ji she di gong le yi chong you xiao he tong yong de fang fa 。chu bo chang suo ding wai ,lun wen hai yan jiu le shu chu mo shi suo ding ji dui ying de ji guang mai chong ji zhi 。zhen dui ji tong zhong de duo ge ben zheng xie zhen mo shi ,di chu le jie ge “mo shi bao li ”he bao he xi shou de mo shi suo ding fang fa (ji li yong fei xian xing pian zhen xuan zhuai xiao ying shua ze mo shi ,bing jie ge bao he xi shou xiao ying ya zhai mai chong ),bing ji yu ci zai “bu bian qiang chang ”tiao jian xia shi xian le ke diao chong pin de mai chong ji guang shu chu 。shi yan zhong huo de le suo mo yu zhi wei 85 mWde mo shi suo ding ji guang mai chong shu chu ;tong guo diao jie fei xian xing pian zhen xuan zhuai xiao ying ,zai bu gai bian guang qian chang du de qing kuang xia ,huo de le san chong chong pin de ji guang mai chong shu chu ;tong shi hai shi xian le chong pin wei 10.896MHzde er ci xie bo suo mo mai chong shu chu 。zhe xiang gong zuo wei kong zhi mo xu ti ji ji guang de mo shi he shi yu te xing kai bi le yi tiao xin de tu jing ,wei ji guang bian ma he chao kuai guang pu xue deng ying yong di gong le yi chong ju you ling huo mai chong chan sheng neng li de jiang you li de ji guang guang yuan 。zhe ye bu tong yu chuan tong suo mo ji guang qi li yong wai qiang diao zhi fang shi chan sheng ke diao chong pin de fang fa ,ji shi yi chong wan quan xin xing de diao kong fang shi 。
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论文作者分别是来自电子科技大学的胡波，发表于刊物电子科技大学2019-07-17论文，是一篇关于随机分布光栅论文,光纤随机激光论文,注入锁定论文,锁模论文,可调重频论文,电子科技大学2019-07-17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，资料来自电子科技大学2019-07-17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：随机分布光栅论文; 光纤随机激光论文; 注入锁定论文; 锁模论文; 可调重频论文; 电子科技大学2019-07-17论文;