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

• Type: Article in International Conference Proceedings Book
• Date: 2014

Authors

Martins, HF (Author) Other; Martin Lopez, S (Author) Other; Filograno, ML (Author) Other; Corredera, P (Author) Other; Frazao, O (Author) FCUP; Gonzalez Herraez, M (Author) Other

Conference proceedings International

Title: 23RD INTERNATIONAL CONFERENCE ON OPTICAL FIBRE SENSORS

23rd International Conference on Optical Fibre Sensors

Santander, SPAIN, JUN 02-06, 2014

Indexing

ISI Web of Knowledge - 2 Citations

Scopus - 4 Citations

Other information

Authenticus ID: P-009-MAQ

DOI: 10.1117/12.2059483

Abstract (EN): We report on the use of second-order Raman amplification to assist a phase-sensitive optical time domain reflectometer (phi OTDR) 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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 4