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.
Original language | English |
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Title of host publication | 25th International Conference on Optical Fiber Sensors |
Publisher | SPIE |
Volume | 10323 |
ISBN (Electronic) | 9781510610910 |
DOIs | |
Publication status | Published - 1 Jan 2017 |
Event | 25th International Conference on Optical Fiber Sensors, OFS 2017 - Jeju, Korea, Republic of Duration: 24 Apr 2017 → 28 Apr 2017 |
Conference
Conference | 25th International Conference on Optical Fiber Sensors, OFS 2017 |
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Country/Territory | Korea, Republic of |
City | Jeju |
Period | 24/04/17 → 28/04/17 |
Keywords
- BOTDA
- Coherent detection
- Digital signal processing
- Distributed fiber sensor
- Stimulated Brillouin scattering
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Computer Science Applications
- Applied Mathematics
- Electrical and Electronic Engineering