A High-SNR Distributed Acoustic Sensor Based on ϕ-OTDR Using a Scalable Phase Demodulation Scheme Without Phase Unwrapping

We propose and experimentally demonstrate a high-SNR Distributed Acoustic Sensing (DAS) scheme using an array of Ultra-Weak Fiber Bragg Gratings (UWFBGs) with dynamic phase extraction in direct detection based on delayed interferometry and a scalable phase-generated carrier demodulation algorithm requiring no phase unwrapping.

[1]  Xiaoyi Bao,et al.  A High-Speed Distributed Ultra-Weak FBG Sensing System With High Resolution , 2017, IEEE Photonics Technology Letters.

[2]  Yonas Muanenda,et al.  Dynamic phase extraction in a modulated double-pulse ϕ-OTDR sensor using a stable homodyne demodulation in direct detection. , 2018, Optics express.

[3]  Yuanyuan Shan,et al.  A High Performance Distributed Optical Fiber Sensor Based on Φ-OTDR for Dynamic Strain Measurement , 2017, IEEE Photonics Journal.

[4]  Xiangjun Xin,et al.  Performance Comparison of PS Star-16QAM and PS Square-Shaped 16QAM (Square-16QAM) , 2017, IEEE Photonics Journal.

[5]  Katerina Krebber,et al.  Wavelength-modulated C-OTDR techniques for distributed dynamic measurement , 2018 .

[6]  Yonas Muanenda,et al.  Application of Raman and Brillouin Scattering Phenomena in Distributed Optical Fiber Sensing , 2019, Front. Phys..

[7]  Liang Li,et al.  Distributed acoustic sensing system based on continuous wide-band ultra-weak fiber Bragg grating array , 2017, 2017 25th Optical Fiber Sensors Conference (OFS).

[8]  Xuping Zhang,et al.  Improved Φ-OTDR Sensing System for High-Precision Dynamic Strain Measurement Based on Ultra-Weak Fiber Bragg Grating Array , 2015, Journal of Lightwave Technology.

[9]  Yonas Muanenda,et al.  A φ-OTDR Sensor for High-frequency Distributed Vibration Measurements with Minimal Post-processing , 2017 .

[10]  Stefano Faralli,et al.  Dynamic phase extraction in high-SNR DAS based on UWFBGs without phase unwrapping using scalable homodyne demodulation in direct detection. , 2019, Optics express.

[11]  Stefano Faralli,et al.  High performance distributed acoustic sensor using cyclic pulse coding in a direct detection coherent-OTDR , 2015, Asia Pacific Optical Sensors Conference.

[12]  Stefano Faralli,et al.  Stable dynamic phase demodulation in a DAS based on double-pulse Φ-OTDR using homodyne demodulation and direct detection , 2018, Commercial + Scientific Sensing and Imaging.

[13]  Gang-Ding Peng,et al.  Distributed OTDR-interferometric sensing network with identical ultra-weak fiber Bragg gratings. , 2015, Optics express.

[14]  Yonas Muanenda,et al.  Recent Advances in Distributed Acoustic Sensing Based on Phase-Sensitive Optical Time Domain Reflectometry , 2018, J. Sensors.

[15]  Ailing Zhang,et al.  High Stability Fiber-Optics Sensors With an Improved PGC Demodulation Algorithm , 2016, IEEE Sensors Journal.

[16]  Dong Liu,et al.  Practical phase unwrapping of interferometric fringes based on unscented Kalman filter technique. , 2015, Optics express.

[17]  T. Giallorenzi,et al.  Homodyne Demodulation Scheme for Fiber Optic Sensors Using Phase Generated Carrier , 1982 .