Comparison of the use of first and second-order Raman amplification to assist a phase-sensitive optical time domain reflectometer in distributed vibration sensing over 125 km

H. F. Martins; S. Martin-Lopez; M. L. Filograno; P. Corredera; O. Frazão; M. Gonzalez-Herraez

doi:10.1117/12.2059483

2 June 2014 Comparison of the use of first and second-order Raman amplification to assist a phase-sensitive optical time domain reflectometer in distributed vibration sensing over 125 km

H. F. Martins, S. Martin-Lopez, M. L. Filograno, P. Corredera, O. Frazão, M. Gonzalez-Herraez

Author Affiliations +

Proceedings Volume 9157, 23rd International Conference on Optical Fibre Sensors; 91576K (2014) https://doi.org/10.1117/12.2059483
Event: OFS2014 23rd International Conference on Optical Fiber Sensors, 2014, Santander, Spain

Abstract

We report on the use of second-order Raman amplification to assist a phase-sensitive optical time domain reflectometer (ΦOTDR ) used for vibration measurements over very long distances. The sensor was able to measure vibrations of up to 380 Hz (limit set by the time of flight of light pulses) in a distance of 125 km with a resolution of 10 m and no post-processing. Balanced detection is used to reduce the relative intensity noise. A comparison with a sensor using first-order Raman amplification under similar conditions is presented and a clear improvement of performance is demonstrated.

Citation Download Citation

H. F. Martins, S. Martin-Lopez, M. L. Filograno, P. Corredera, O. Frazão, and M. Gonzalez-Herraez "Comparison of the use of first and second-order Raman amplification to assist a phase-sensitive optical time domain reflectometer in distributed vibration sensing over 125 km", Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 91576K (2 June 2014); https://doi.org/10.1117/12.2059483

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