Strong Cancellation of RIN Transfer in a Raman-Assisted BOTDA Using Balanced Detection
Raman assistance is one of the most interesting routes toward extending the range of Brillouin optical timedomain analysis (BOTDA) systems. Unfortunately, the use of Raman amplification normally entails an important relative intensity noise (RIN) transfer toward the probe wave, which severely limits...
| Autores: | , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2014 |
| País: | España |
| Institución: | Universidad de Alcalá (UAH) |
| Repositorio: | e_Buah Biblioteca Digital Universidad de Alcalá |
| Idioma: | inglés |
| OAI Identifier: | oai:ebuah.uah.es:10017/25138 |
| Acceso en línea: | http://hdl.handle.net/10017/25138 https://dx.doi.org/10.1109/LPT.2014.2336699 |
| Access Level: | acceso abierto |
| Palabra clave: | Distributed sensor Optical fiber sensors Raman scattering Brillouin scattering Balanced detection Temperature sensor Ciencias tecnológicas Electrónica Technology Electronics |
| Sumario: | Raman assistance is one of the most interesting routes toward extending the range of Brillouin optical timedomain analysis (BOTDA) systems. Unfortunately, the use of Raman amplification normally entails an important relative intensity noise (RIN) transfer toward the probe wave, which severely limits this approach. In this letter, we show that the RIN transfer problem can be effectively avoided using a slightly modified scheme comprising a dual-sideband modulated probe and balanced detection. Our measurements clearly indicate a nearly complete cancellation of the RIN noise in the detected trace signal. The use of balanced detection in our Raman-assisted BOTDA setup implies a fivefold increase in figure of merit compared with the same setup using conventional detection. |
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