Real distributed vibration sensing with high frequency response based on pulse pair

Qian He; Tao Zhu; Xianghui Xiao; Dongmei Diao; Wei Huang; Xiaoyi Bao

doi:10.1117/12.2059252

2 June 2014 Real distributed vibration sensing with high frequency response based on pulse pair

Qian He, Tao Zhu, Xianghui Xiao, Dongmei Diao, Wei Huang, Xiaoyi Bao

Proceedings Volume 9157, 23rd International Conference on Optical Fibre Sensors; 915761 (2014) https://doi.org/10.1117/12.2059252
Event: OFS2014 23rd International Conference on Optical Fiber Sensors, 2014, Santander, Spain

Abstract

In conventional phase-sensitive optical time domain reflectometry (φ-OTDR), the length of sensing fiber mainly determines the repetition rate of probe light pulses, which limits the extent of detectable frequency range. Moreover, averaging method, which is adopted to enhance the location signal-to-noise-ratio (SNR), further decreases the maximum detectable frequency. This paper demonstrates a distributed vibration sensor with satisfied location SNR and extended frequency response range by using a probe pulse pair with a frequency difference. Experimental results show that this method is able to break the trade-off between the given sensing fiber length and the traditional maximum detectable frequency response of φ-OTDR system.

Citation Download Citation

Qian He, Tao Zhu, Xianghui Xiao, Dongmei Diao, Wei Huang, and Xiaoyi Bao "Real distributed vibration sensing with high frequency response based on pulse pair", Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 915761 (2 June 2014); https://doi.org/10.1117/12.2059252

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available