Brillouin optical time-domain reflectometry using up-conversion single-photon detector
Abstract
A direct-detection Brillouin optical time-domain reflectometry (BOTDR) using an up-conversion photon-counting detector and an all-fiber structure Fabry-Perot scanning interferometer is demonstrated with shot-noise limited performance. Taking advantage of ultra-low noise equivalent power of the up-conversion photon-counting detector and high spectral resolution of the interferometer, the Brillouin spectra along a polarization maintaining fiber (PMF) are analyzed in the optical frequency domain directly. In contrast with heterodyne BOTDR, photon-counting BOTDR has better EM compatibility and faster speed in data processing. In experiments, using peak input power of 20 dBm, temperature profile along a 9 km PMF is retrieved according to the Brillouin shifts, with spatial/temporal resolution of 2 m/15 s. The precision is 0.7 °C at the leading end and 1.2 °C at the trailing end.
- Publication:
-
Optics Communications
- Pub Date:
- December 2016
- DOI:
- 10.1016/j.optcom.2016.06.050
- arXiv:
- arXiv:1504.01222
- Bibcode:
- 2016OptCo.381...37X
- Keywords:
-
- Brillouin optical time-domain reflectometry;
- Up-conversion;
- Single-photon detector;
- Fabry-Perot interferometer;
- Quantum Physics;
- Physics - Optics
- E-Print:
- 4 pages, 5 figures