Optical time-domain reflectometer based multiplexed sensing scheme for environmental sensing

J. P. Carvalho; C. Gouveia; J. L. Santos; P. A. S. Jorge; J. M. Baptista

doi:10.1117/12.922975

9 May 2012 Optical time-domain reflectometer based multiplexed sensing scheme for environmental sensing

J. P. Carvalho, C. Gouveia, J. L. Santos, P. A. S. Jorge, J. M. Baptista

Proceedings Volume 8439, Optical Sensing and Detection II; 84390B (2012) https://doi.org/10.1117/12.922975
Event: SPIE Photonics Europe, 2012, Brussels, Belgium

Abstract

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.

Citation Download Citation

J. P. Carvalho, C. Gouveia, J. L. Santos, P. A. S. Jorge, and J. M. Baptista "Optical time-domain reflectometer based multiplexed sensing scheme for environmental sensing", Proc. SPIE 8439, Optical Sensing and Detection II, 84390B (9 May 2012); https://doi.org/10.1117/12.922975

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available