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Ingeniería de funciones de activación no lineales para redes neuronales totalmente ópticas mediante interferencia
Optics express
|December 19, 2025
Resumen
Los investigadores desarrollaron un esquema de activación no lineal de baja potencia para redes neuronales totalmente ópticas (AONN). Este avance permite hardware de IA óptico escalable y energéticamente eficiente con potencial para entrenamiento totalmente óptico.
Área de la Ciencia:
- Óptica cuántica
- Hardware de inteligencia artificial
Sus antecedentes:
- Las redes neuronales totalmente ópticas (AONN) ofrecen ventajas de velocidad y energía para la IA.
- La escalabilidad de las AONN se ve obstaculizada por las altas demandas de energía de los elementos ópticos no lineales.
Objetivo del estudio:
- Introducir un esquema de activación no lineal de baja potencia para AONN escalables.
- Permitir el procesamiento óptico de múltiples entradas y múltiples salidas y el entrenamiento totalmente óptico.
Principales métodos:
- Se utilizó un sistema cuántico de tres niveles impulsado por campos láser duales.
- Se implementó una matriz de activación no lineal de dos canales con funciones sigmoides y ReLU sintonizables.
- Validado mediante modelado teórico y demostración experimental en celdas de vapor de rubidio.
Principales resultados:
- Se logró un consumo de energía ultrabajo (17 μW por neurona).
- Se demostró la viabilidad de escalar a millones de neuronas con una potencia total inferior a 20 W.
- Se generaron con éxito señales similares a gradientes para retropropagación totalmente óptica.
Conclusiones:
- El esquema desarrollado avanza significativamente el hardware de IA óptico escalable, de alta velocidad y energéticamente eficiente.
- Allana el camino para el entrenamiento totalmente óptico práctico de redes neuronales profundas.
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