Polarization Multiplexed Interrogation Technique for FBG Sensor Array

• 作者: Debabrata SIKDAR Vinita TIWARI Anupam SONI Ritesh JAISWAL Surekha BHANOT
• 来源期刊: 光子传感器:英文版
• 学科: 工学
• 关键词: 光纤光栅传感器 传感器阵列 偏振复用 光纤布拉格光栅 校准技术 阵列传感器 FBG 多路复用
• 年，卷（期）: 2015,（3）
• 页码范围: 193-201
• 页数: 9页
• 分类号: TN929.11
• 语种: 中文

摘要

This paper proposes a polarization multiplexed interrogation technique for fiber Bragg grating (FBG) sensor array. The novelty of the proposed model is its ability to reduce interference and cross talk, thus allowing larger number of FBG sensors to be interrogated in an array. The calibration technique has been illustrated in this work for the FBG sensor array, where data from each sensor are linearly polarized and multiplexed before co-propagation, to find out the tapping points that enable identification of each sensor data uniquely. Simulation has been carried out for odd number and even number of sensors in an array. Even with interfering input, this proposed scheme can interrogate and distinctively identify each sensor data using appropriate tuning of polarization-splitter, polarization-rotator, and polarization-attenuator at the detector end during the calibration process. The significance of the proposed method is its compact size, which makes this calibration system ready to be deployed in real-time sensing applications and data acquisition from the FBG sensor array.