Abstract
We present an inexpensive technique capable to interrogate multiplexed sensors based on ultra-low-reflective Bragg gratings written in a long standard telecom fiber. The technique is suitable for distributed detection and localization of disturbances in security and early warning systems for pipeline monitoring, in linear temperature sensors for fire detectors, etc. It is based on the correlation OTDR principle measuring cross-correlation between a noise-like probe signal and the signal reflected back from the sensing fiber. In order to simplify the sensor configuration, an unmodulated CW DFB diode laser was used as a light source. A noise-like probe signal was generated by conversion of phase noise of the DFB laser into intensity noise with a help of unbalanced Michelson interferometer. Results of the experimental verification of the proposed technique are presented.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
