Brillouin OTDR (BOTDR) distributed fiber sensing system is featured by excellent real-time performance, high spatial resolution and measurement accuracy, as well as simple structure.

Design considerations of laser sources for coherent BOTDR system

• 1550nm wavelength is adopted due to its lower loss in the fiber;
• The higher the optical power, the larger the Brillouin scattering signal intensity (no SBS);
• The narrower the linewidth of laser source, the better the measurement accuracy of system;
• The narrower the spectral linewidth of laser source, the better the working distance of BOTDR;

Applications

• Oil pipeline monitoring
• Bridge monitoring
• Power line monitoring