基于波长编码和阵列波导光栅解调的光纤位置传感器  

Optical fiber position sensor based on wavelength encoding and arrayed waveguide grating demodulation

作　　者：桂聪 宋五洲 湛位 刘浩成 夏卫生[1] GUI Cong;SONG Wuzhou;ZHAN Wei;LIU Haocheng;XIA Weisheng(School of Materials Science and Engineering,Huazhong University of Science and Technology,Wuhan 430074,China)

机构地区：[1]华中科技大学材料科学与工程学院,武汉430074

出　　处：《光通信技术》2021年第10期40-43,共4页Optical Communication Technology

基　　金：华中科技大学人才引进基金(No.3004110112)资助。

摘　　要：波长编码光纤位置传感器具有对光强变化不敏感、稳定性高等优点,为了进一步简化结构和降低成本,提出了一种新型波长编码光纤位置传感器。使用10阶二进制伪随机m序列作为传感器的编码基准,以100μm的栅距制作编码标尺并搭建传感系统,由工作通道的输出电压解调绝对位置信息;同时,阵列波导光栅(AWG)作为解复用器与多个光电二极管组成多波长检测系统,简化了传感系统并提高了响应速度。采用单向定位精度为6μm的步进电机作为位移量标准,验证了设计分辨率为100μm的传感器方案可行性。The wavelength-encoded optical fiber position sensor has the advantages of being insensitive to light intensity changes and high stability.In order to further simplify the structure and reduce the cost,a new type of wavelength-encoded optical fiber position sensor is proposed.Using 10-order binary pseudo-random m-sequence as the coding standard of the sensor,the coding scale is made with a grating pitch of 100μm and the sensing system is built,and the absolute position information is demodulated by the output voltage of the working channel.At the same time,the arrayed waveguide grating(AWG)is used as the demultiplexer and multiple photodiodes form a multi-wavelength detection system,which simplifies the sensing system and improves the response speed.Using a stepping motor with a unidirectional positioning accuracy of 6μm as the displacement standard,the feasibility of designing a sensor with a resolution of 100μm is verified.

关 键 词：光纤传感器 波长编码 M序列 阵列波导光栅 强度解调 

分 类 号：O439[机械工程—光学工程] TP212.1[理学—光学]