Share Email Print
cover

Proceedings Paper

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
Author(s): H. F. Martins; S. Martin-Lopez; M. L. Filograno; P. Corredera; O. Frazão; M. Gonzalez-Herraez
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper 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.

Paper Details

Date Published: 2 June 2014
PDF: 4 pages
Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 91576K (2 June 2014); doi: 10.1117/12.2059483
Show Author Affiliations
H. F. Martins, INESC TEC (Portugal)
Univ. do Porto (Portugal)
Univ. de Alcalá (Spain)
S. Martin-Lopez, Univ. de Alcalá (Spain)
M. L. Filograno, Instituto de Óptica, CSIC (Spain)
P. Corredera, Instituto de Óptica, CSIC (Spain)
O. Frazão, INESC TEC (Portugal)
Univ. do Porto (Portugal)
M. Gonzalez-Herraez, Univ. de Alcalá (Spain)


Published in SPIE Proceedings Vol. 9157:
23rd International Conference on Optical Fibre Sensors
José M. López-Higuera; Julian D. C. Jones; Manuel López-Amo; José Luis Santos, Editor(s)

© SPIE. Terms of Use
Back to Top