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
| Autor: | Pedro Corredera, Miguel Gonzalez-Herraez, Massimo L. Filograno, Hugo F. Martins, Orlando Frazão, Sonia Martin-Lopez |
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| Přispěvatelé: | Universidad de Alcalá. Departamento de Electrónica |
| Rok vydání: | 2014 |
| Předmět: |
Raman scattering
Technology Materials science Raman amplification Relative intensity noise Optical time-domain reflectometer symbols.namesake Optics TECHNOLOGY Ciencias tecnológicas Phase-sensitive OTDR business.industry Distributed sensor Optical fiber sensors Resolution (electron density) Vibration sensor Vibration Time of flight Fiber optic sensor symbols CIENCIAS TECNOLÓGICAS Electrónica Electronics business |
| Zdroj: | e_Buah Biblioteca Digital Universidad de Alcalá instname |
| ISSN: | 0277-786X |
| DOI: | 10.1117/12.2059483 |
| Popis: | 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 postprocessing. 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. Ministerio de Economía y Competitividad European Commission |
| Databáze: | OpenAIRE |
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