Abstract
Slope-assisted Brillouin optical correlation-domain reflectometry (SA-BOCDR) is one of the high-speed distributed strain sensing techniques, but its strain dynamic range has been limited to approximately 0.15%, which is far from being sufficient for some practical applications. In this paper, we clarify that, unlike widely used time-domain techniques, SA-BOCDR has a trade-off relation between the strain dynamic range and the spatial resolution. This trade-off originates from the unique bell-shaped noise floor inherently involved in the Brillouin gain spectrum observed with correlation-domain techniques. We experimentally show that, at the cost of three times lowered spatial resolution, the strain dynamic range of >0.6% can be achieved.
Original language | English |
---|---|
Article number | 075204 |
Journal | Measurement Science and Technology |
Volume | 30 |
Issue number | 7 |
DOIs | |
Publication status | Published - 2019 Jun 4 |
Externally published | Yes |
Keywords
- Brillouin scattering
- distributed optical fiber sensor
- strain dynamic range
ASJC Scopus subject areas
- Instrumentation
- Engineering (miscellaneous)
- Applied Mathematics