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    Este estudio introduce un sistema de análisis óptico de dominio de tiempo (BOTDA) de extremo a extremo de Brillouin, ampliando el rango de detección. La nueva configuración logra la detección de fibra de larga distancia con alta resolución y precisión.

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    Área de la Ciencia:

    • Optoelectrónica y sus derivados
    • Detección por fibra óptica
    • La fotónica

    Sus antecedentes:

    • Los sistemas convencionales de análisis óptico de dominio de tiempo de Brillouin (BOTDA) utilizan una arquitectura de acceso de dos extremos.
    • Esta arquitectura requiere un diseño de cableado de ida y vuelta para la fibra bajo prueba (FUT).
    • El diseño de ida y vuelta limita el rango de detección a la mitad de la longitud total de la fibra.

    Objetivo del estudio:

    • Proponer y demostrar una configuración de topología de extremo a extremo para sistemas BOTDA.
    • Para lograr un largo rango de detección con una configuración de ruta abierta.
    • Para superar las limitaciones de alcance de los sistemas BOTDA convencionales.

    Principales métodos:

    • Implementó una topología de extremo a extremo donde las luces de la bomba y la sonda entran en el FUT desde extremos opuestos.
    • Utilizó una fuente de luz remota para la luz de la sonda en el extremo lejano.
    • Se utiliza un bloqueo de inyección para la sincronización de la frecuencia entre las luces de la bomba y la sonda, utilizando la luz de la sonda de propagación hacia atrás como fuente principal.

    Principales resultados:

    • Demostró el sistema con una fibra de 80 km de un solo modo.
    • Se logró una resolución espacial de 5,0 m en el extremo más alejado de la FUT.
    • Se obtuvo una incertidumbre de frecuencia de 0,85 MHz en el extremo lejano del FUT.

    Conclusiones:

    • La configuración BOTDA de extremo a extremo propuesta amplía efectivamente el rango de detección.
    • El sistema demuestra una alta resolución espacial y precisión de frecuencia a largas distancias.
    • Esta configuración ofrece una solución viable para aplicaciones de detección de fibra óptica de largo alcance.