23 April 2017 Coherent-detection-assisted BOTDA system without averaging using single-sideband modulated local oscillator signal
Author Affiliations +
Proceedings Volume 10323, 25th International Conference on Optical Fiber Sensors; 103237L (2017) https://doi.org/10.1117/12.2265293
Event: 25th International Conference on Optical Fiber Sensors, 2017, Jeju, Korea, Republic of
Abstract
A novel setup for coherent-detection-assisted Brillouin optical time domain analysis (BOTDA) is proposed and demonstrated. Performance enhancement is enabled by a power-controllable local oscillator (LO) generated using single-side-band (SSB) modulation. Through employing a commercial coherent receiver and polarization diversity scheme, the Brillouin gain traces carried on a stable intermediate frequency (IF) are obtained in real time without any averaging and processed by digital signal processing (DSP) without the need of ultra-narrow optical band pass filter. A spatial resolution of 4 m and frequency uncertainty of 1.473 MHz are achieved over 40 km sensing range using a single scan.
© (2017) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Nan Guo, Nan Guo, Liang Wang, Liang Wang, Chao Jin, Chao Jin, Tao Gui, Tao Gui, Kangping Zhong, Kangping Zhong, Xian Zhou, Xian Zhou, Jinhui Yuan, Jinhui Yuan, Changyuan Yu, Changyuan Yu, Hwa-Yaw Tam, Hwa-Yaw Tam, Chao Lu, Chao Lu, } "Coherent-detection-assisted BOTDA system without averaging using single-sideband modulated local oscillator signal", Proc. SPIE 10323, 25th International Conference on Optical Fiber Sensors, 103237L (23 April 2017); doi: 10.1117/12.2265293; https://doi.org/10.1117/12.2265293
PROCEEDINGS
4 PAGES


SHARE
RELATED CONTENT


Back to Top