Optical Time-Domain Reflectometer Based Multiplexed Sensing Scheme for Environmental Sensing

• Type: Article in International Conference Proceedings Book
• Date: 2012

Authors

Carvalho, JP (Author) Other; Gouveia, C (Author) Other; Santos, JL (Author) FCUP; Jorge, PAS (Author) FCUP; Baptista, JM (Author) Other

Conference proceedings International

Title: Proceedings of SPIE - The International Society for Optical Engineering

Optical Sensing and Detection II

Brussels, 16 April 2012 through 19 April 2012

Indexing

ISI Web of Knowledge - 0 Citations

Scopus - 0 Citations

Scientific classification

FOS: Engineering and technology > Electrical engineering, Electronic engineering, Information engineering

Other information

Authenticus ID: P-002-G7Q

DOI: 10.1117/12.922975

Abstract (EN): In our study, remote environmental sensing is presented using a standard optical time domain reflectometer (OTDR). The measurement of environmental parameters using optical sensors is an expanding area of research with growing importance. Fiber optic sensors are an interesting solution for that due to their high sensitivity, small size, and capability for on-site, real-time, remote, and distributed sensing capabilities. Our multiplexing sensing scheme approach uses transmissive filters (long period gratings - LPGs) interrogated by the OTDR return pulses. The loss induced at the resonance wavelengths varies with changes in the environment refractive index, temperature or other physical parameters. Experimental results show that the insertion of an erbium amplifier improves the measurement resolution in certain situations. Further analysis show that a remote multiplexed sensing scheme allows us to perform simple and low cost real time measurement of refractive index and temperature over long distances.

Language: English

Type (Professor's evaluation): Scientific