Performance improvement of a self-heterodyne detection BOTDR system employing broad-band laser
CSTR:
Author:
Affiliation:

1. Institute of Information Technology, Hebei University of Economics and Business, Shijiazhuang 050061, China ;2. Department of Electronic and Communication Engineering, North China Electric Power University, Baoding 071003, China

  • Article
  • | |
  • Metrics
  • |
  • Reference
  • |
  • Related
  • |
  • Cited by
  • | |
  • Comments
    Abstract:

    The self-heterodyne detection Brillouin optical time domain reflectometer (BOTDR) system using broad-band laser is proposed to reduce coherent Rayleigh noise and improve the system performance. Compared with the system with narrow-band laser, the stimulated Brillouin scattering (SBS) threshold can be improved by about 3 dB. The experimental results of the narrow-band laser measurements for three times independently and the broad-band laser measurement for one time are compared. The root-mean-square (RMS) errors of Brillouin linewidth for two systems with narrow-band laser and broad-band laser are 6.9 MHz and 2.7 MHz, respectively, and the RMS errors of temperature for the heated fiber are about 1.3 °C and 0.7 °C. With the broad-band laser, signal-to-noise ratio (SNR) of the unheated fiber is approximately equivalent to that of the integrated three independent Brillouin signals for the narrow-band laser, and the results are believed to be beneficial for performance improvement and measurement time reduction.

    Reference
    Related
    Cited by
Get Citation

LI Xiao-juan, LI Yong-qian, ZENG Wen-xian, FAN Han-bai, ZHANG Li-xin. Performance improvement of a self-heterodyne detection BOTDR system employing broad-band laser[J]. Optoelectronics Letters,2018,14(5):325-330

Copy
Share
Article Metrics
  • Abstract:
  • PDF:
  • HTML:
  • Cited by:
History
  • Received:April 10,2018
  • Revised:May 09,2018
  • Online: March 26,2019
Article QR Code