Eliminating the non-local effect in frequency-fixed probe wave based BOTDA sensor

Sheng Wang; Zhisheng Yang; Xiaobin Hong; Wenqiao Lin; Jian Wu

doi:10.1117/12.2267527

23 April 2017 Eliminating the non-local effect in frequency-fixed probe wave based BOTDA sensor

Sheng Wang, Zhisheng Yang, Xiaobin Hong, Wenqiao Lin, Jian Wu

Proceedings Volume 10323, 25th International Conference on Optical Fiber Sensors; 1032398 (2017) https://doi.org/10.1117/12.2267527
Event: 25th International Conference on Optical Fiber Sensors, 2017, Jeju, Korea, Republic of

Abstract

The robustness of the BOTDA method based on dual-tone probe wave with fixed frequency separation is studied. It is verified that when the sensing fiber consists of two fiber segments with large Brillouin frequency shift difference (>100 MHz), the non-local effect would take place in the front fiber segment, which gives rise to frequency error on the determination of hotspot. Aiming at solving this problem, both the upper and lower probe sidebands are acquired simultaneously by using two photodiodes, and the average between the Brillouin gain and loss spectrum is calculated to eliminate the detrimental impact of the non-local effect.

Citation Download Citation

Sheng Wang, Zhisheng Yang, Xiaobin Hong, Wenqiao Lin, and Jian Wu "Eliminating the non-local effect in frequency-fixed probe wave based BOTDA sensor", Proc. SPIE 10323, 25th International Conference on Optical Fiber Sensors, 1032398 (23 April 2017); https://doi.org/10.1117/12.2267527

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