.png){kind=icon}
Return
High-performance optical chirp chain BOTDA by using a pattern recognition algorithm and the differential pulse-width pair technique
.png){kind=icon}
PRE
AI
DOI：10.1364/PRJ.7.000652.png)
.png){kind=icon}
Original request for help.png){kind=icon}
Share.png){kind=icon}
Save
Abstract
En 中文
Optical chirp chain Brillouin optical time-domain analysis (OCC-BOTDA) has the capabilities of fast measurement, high Brillouin threshold, and freedom from the nonlocal effect; at the same time, however, it also has problems introduced by transient stimulated Brillouin scattering. The influence of the transient interaction is reflected as the broadened asymmetric Brillouin spectrum, the ghost peak, and the frequency shift of the main peak. This introduces difficulty in computing the fiber Brillouin frequency shift with good measurement accuracy. Besides, the OCC modulation causes additional noise due to the uneven amplitude response for different frequency components. In this work, we propose a high-performance OCC-BOTDA using the principal component analysis (PCA) based pattern recognition algorithm and differential pulse-width pair (DPP) technique. After building the Brillouin spectrum database (i.e., all patterns), the fiber intrinsic Brillouin frequency shift can be recognized by the PCA algorithm from a nonstandard Brillouin spectrum profile, resulting in good measurement accuracy. Meanwhile, the DPP technique, subtracting between two Brillouin signals generated by two wide-width pump pulses, is utilized to reduce the OCC modulation noise and avoid the pulse self-phase modulation effect in long-range BOTDA sensing. In the experiment, a temperature measurement with 1.3 MHz measurement precision, 4 m spatial resolution, and 5 s measurement time is achieved over a 100 km single-mode fiber. (C) 2019 Chinese Laser Press
Keywords:
TIME-DOMAIN ANALYSIS
SLOPE-ASSISTED BOTDA
ANALYSIS SENSOR
BRILLOUIN
TEMPERATURE
Journal
IF:
7.2
Papers:
2.4K
Citations:
1.3W
Organization
Cited Papers
Brillouin optical time-domain analysis sensor assisted by Brillouin distributed amplification of pump pulses.png)
OPTICS EXPRESS
OAAI
OPTICS EXPRESSIF3.3
OAAIShareSaveLong-range simplex-coded BOTDA sensor over 120 km distance employing optical preamplificationOPTICS LETTERS
OAAI
OPTICS LETTERSIF3.3
OAAIShareSaveShareSaveSlope-assisted BOTDA based on vector SBS and frequency-agile technique for wide-strain-range dynamic measurementsOPTICS EXPRESSOAAI
OPTICS EXPRESSIF3.3
OAAIShareSaveDynamic strain measurement in optical fibers by stimulated Brillouin scatteringOPTICS LETTERS
OPTICS LETTERSIF3.3
PREAI
ShareSaveTemperature extraction in Brillouin optical time-domain analysis sensors using principal component analysis based pattern recognitionOPTICS EXPRESSOAAI
OPTICS EXPRESSIF3.3
OAAIShareSave150 km fast BOTDA based on the optical chirp chain probe wave and Brillouin loss schemeOPTICS LETTERS
OPTICS LETTERSIF3.3
PREAI
ShareSave
View more