A multichannel optic fiber sensing system based on hybrid Sagnac structure

Ye Zi; Li Churui; Wang Chao

摘要

Abstract >We proposed a multichannel optic fiber sensing system based on hybrid Sagnac structure to convert phase changes of light transmitting in optic fiber caused by vibrations to be detected into intensity changes of interference signals. By using the differential demodulation method, the originally applied vibration signal can be retrieved for further signal analysis. The auxiliary modulation method was introduced into this system so that even tiny vibration signals less than one period can also be detected precisely since all the original signals would be carried by the high frequency and large modulation signals. In the signal retrieve algorithm, we also added a response smoothing transform algorithm to improve the smoothness of the system's frequency response. Besides, in association with wavelength division multiplexer, this sensing system can realize multipoints' vibration detection. By designing the spatial arrangement of sensing fiber array according to application scenarios, this system can realize monitoring and positioning vibration sources with appropriate algorithms. </abstract> </span> <span class="z_kbtn z_kbtnclass hoverxs" style="display: none;">展开▼</span> </div> <div class="translation abstracttxt"> <span class="zhankaihshouqi fivelineshidden" id="abstract"> <span>机译：</span><abstract type =“main”xml：lang =“en”> <标题类型=“main”>抽象</ title> >我们提出了一种基于混合萨尼亚克结构在光纤由振动引起的光发射转换的相位变化的多信道光纤传感系统被检测到的干扰信号的强度的变化。通过使用差分解调方法，可以检索最初施加的振动信号以进行进一步的信号分析。将辅助调制方法引入该系统中，使得甚至可以精确地检测到小于一个周期的微小振动信号，因为所有原始信号都将由高频和大调制信号承载。在信号检索算法中，我们还添加了响应平滑变换算法，以提高系统频率响应的平滑度。此外，与波分复用器相关联，该传感系统可以实现多点的振动检测。通过设计根据应用场景的感测光纤阵列的空间布置，该系统可以实现具有适当算法的监控和定位振动源。</ p> </摘要> </span> <span class="z_kbtn z_kbtnclass hoverxs" style="display: none;">展开▼</span> </div> </div> <div class="record"> <h2 class="all_title" id="enpatent33" >著录项</h2> <ul> <li> <span class="lefttit">来源</span> <div style="width: 86%;vertical-align: text-top;display: inline-block;"> <a href='/journal-foreign-24977/'>《Microwave and optical technology letters》</a> <b style="margin: 0 2px;">|</b><span>2019年第11期</span><b style="margin: 0 2px;">|</b><span>共6页</span> </div> </li> <li> <div class="author"> <span class="lefttit">作者</span> <p id="fAuthorthree" class="threelineshidden zhankaihshouqi"> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Ye Zi&option=202" target="_blank" rel="nofollow">Ye Zi;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Li Churui&option=202" target="_blank" rel="nofollow">Li Churui;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Wang Chao&option=202" target="_blank" rel="nofollow">Wang Chao;</a> </p> <span class="z_kbtnclass z_kbtnclassall hoverxs" id="zkzz" style="display: none;">展开▼</span> </div> </li> <li> <div style="display: flex;"> <span class="lefttit">作者单位</span> <div style="position: relative;margin-left: 3px;max-width: 639px;"> <div class="threelineshidden zhankaihshouqi" id="fOrgthree"> <p>Department of Materials ScienceFudan UniversityShanghai China;</p> <p>Department of Materials ScienceFudan UniversityShanghai China;</p> <p>Department of Materials ScienceFudan UniversityShanghai China;</p> </div> <span class="z_kbtnclass z_kbtnclassall hoverxs" id="zhdw" style="display: none;">展开▼</span> </div> </div> </li> <li > <span class="lefttit">收录信息</span> <span style="width: 86%;vertical-align: text-top;display: inline-block;"></span> </li> <li> <span class="lefttit">原文格式</span> <span>PDF</span> </li> <li> <span class="lefttit">正文语种</span> <span>eng</span> </li> <li> <span class="lefttit">中图分类</span> <span><a href="https://www.zhangqiaokeyan.com/clc/1165.html" title="光学">光学;</a></span> </li> <li class="antistop"> <span class="lefttit">关键词</span> <p style="width: 86%;vertical-align: text-top;"> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=fiber interferometer&option=203" rel="nofollow">fiber interferometer;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=hybrid Sagnac&option=203" rel="nofollow">hybrid Sagnac;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=multichannel&option=203" rel="nofollow">multichannel;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=sensing array&option=203" rel="nofollow">sensing array;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=WDM&option=203" rel="nofollow">WDM;</a> </p> <div class="translation"> 机译：纤维干涉仪;混合锯齿状;多通道;传感阵列;WDM; </div> </li> </ul> </div> </div> <div class="literature cardcommon"> <div class="similarity "> <h3 class="all_title" id="enpatent66">相似文献</h3> <div class="similaritytab clearfix"> <ul> <li class="active" >外文文献</li> <li >中文文献</li> <li >专利</li> </ul> </div> <div class="similarity_details"> <ul > <li> <div> <b>1. </b><a 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