Microwave photonics filtering interrogation technique under coherent regime for hot spot detection on cascaded FBG fiber

Javier Hervás; David Barrera; Javier Madrigal; Salvador Sales

doi:10.1117/12.2265395

23 April 2017 Microwave photonics filtering interrogation technique under coherent regime for hot spot detection on cascaded FBG fiber

Javier Hervás, David Barrera, Javier Madrigal, Salvador Sales

Author Affiliations +

Proceedings Volume 10323, 25th International Conference on Optical Fiber Sensors; 1032341 (2017) https://doi.org/10.1117/12.2265395
Event: 25th International Conference on Optical Fiber Sensors, 2017, Jeju, Korea, Republic of

Abstract

An interrogation technique of cascaded FBGs sensors based on a Microwave Photonics filtering technique under coherent regime is presented. The sensing information of a 5m fiber coil with 500 weak FBGs with a similar central wavelength is retrieved. The principle of operation is based on the calculation of the impulsive response by recording the electrical frequency response of the system. Hot spot detection and temperature measurement are demonstrated through experimental measurements with a temperature sensitivity of 0.6dB/ºC. The resolution in the measurement is related to the bandwidth of the electrical measurement and we have obtained a resolution of 20 cm for an electrical bandwidth of 1 GHz and a SNR bigger than 16dB.

Citation Download Citation

Javier Hervás, David Barrera, Javier Madrigal, and Salvador Sales "Microwave photonics filtering interrogation technique under coherent regime for hot spot detection on cascaded FBG fiber", Proc. SPIE 10323, 25th International Conference on Optical Fiber Sensors, 1032341 (23 April 2017); https://doi.org/10.1117/12.2265395

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