Microwave photonics filtering technique for interrogating a very-weak fiber Bragg grating cascade sensor
A system to interrogate photonic sensors based on a very weak fiber Bragg grating cascade fiber is presented and experimentally validated and dedicated to detecting the presence and location of a spot event. The distributed sensor proposed consists of a 5-m-long fiber, containing 500 9-mm-long Bragg...
| Autores: | , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2014 |
| País: | España |
| Institución: | Universitat Politècnica de València (UPV) |
| Repositorio: | RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia |
| Idioma: | inglés |
| OAI Identifier: | oai:riunet.upv.es:10251/54041 |
| Acceso en línea: | https://riunet.upv.es/handle/10251/54041 |
| Access Level: | acceso abierto |
| Palabra clave: | Discrete-time sensor Fiber Bragg gratings (FBGs) Fiber optic sensors Microwave photonics filters Weak FBGs. TEORIA DE LA SEÑAL Y COMUNICACIONES |
| Sumario: | A system to interrogate photonic sensors based on a very weak fiber Bragg grating cascade fiber is presented and experimentally validated and dedicated to detecting the presence and location of a spot event. The distributed sensor proposed consists of a 5-m-long fiber, containing 500 9-mm-long Bragg gratings with a grating separation of 10.21 mm. The principle of operation is based on a technique used to analyze microwave photonics filters. The detection of spot events along the sensor is demonstrated with remarkable accuracy under 1 mm, using a photodetector and a modulator with a bandwidth of only 500 MHz. The simple proposed scheme is intrinsically robust against environmental changes and is easy to reconfigure. |
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