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Influencia del tamaño del núcleo en el umbral de inestabilidad de modo transversal de los amplificadores de fibra
Optics express
|February 20, 2026
Resumen
Este estudio revela que el tamaño del núcleo tiene un impacto más débil en la inestabilidad del modo transversal en las fibras de gran paso dopadas con Ytterbium de lo previsto. También logró una potencia de salida récord de 600 W de láser de fibra.
Área de la Ciencia:
- Física del láser física del láser.
- Tecnología de fibra óptica tecnología de fibra óptica.
- Ciencia de los materiales ciencia de los materiales.
Sus antecedentes:
- La inestabilidad del modo transversal (TMI) limita la potencia de salida en los láseres de fibra de alta potencia.
- Comprender la dependencia de TMI en el tamaño del núcleo de la fibra es crucial para el diseño del láser.
- Los modelos teóricos anteriores ofrecían predicciones sobre esta relación.
Objetivo del estudio:
- Investigar sistemáticamente el impacto del tamaño del núcleo en el umbral de TMI.
- Para aislar el efecto del tamaño del núcleo de la saturación de ganancia y el fotodarkening.
- Para comparar hallazgos experimentales con predicciones teóricas.
Principales métodos:
- Utilizó fibras de paso grande dopadas con Yterbio con características modales estables.
- Se llevaron a cabo mediciones precisas que tenían en cuenta la saturación de ganancia y el foto oscurecimiento.
- El tamaño del núcleo de fibra varía sistemáticamente para estudiar la dependencia del umbral de TMI.
Principales resultados:
- Se encontró que la dependencia del umbral de TMI en el tamaño del núcleo era más débil de lo previsto por algunos modelos.
- Se logró un umbral de TMI superior a 600 W en una fibra.
- Esto representa la potencia de salida promedio de difracción limitada más alta reportada de una fibra tipo barra dopada con Ytterbium.
Conclusiones:
- El tamaño del núcleo es un factor menos dominante en el IMT de lo que se teorizó anteriormente.
- La configuración experimental permitió el funcionamiento de láser de fibra de alta potencia y difracción limitada.
- Investigaciones adicionales pueden refinar los modelos teóricos de TMI en láseres de fibra.
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