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Niobato de litio de película delgada en zafiro para modulador de infrarrojo medio integrado
Pierre Didier1, Prakhar Jain2, Mathieu Bertrand3
1ETH Zurich, Department of Physics, Institute for Quantum Electronics, Optical Nanomaterial Group, Zurich, Switzerland. pdidier@phys.ethz.ch.
Nature communications
|February 21, 2026
Resumen
Los investigadores desarrollaron un nuevo modulador de infrarrojo medio para la comunicación óptica. Este dispositivo de niobato de litio de alta velocidad permite una transmisión de datos más rápida y peines de frecuencia más amplios en el espectro infrarrojo medio.
Área de la Ciencia:
- Fotónica y Ingeniería Óptica.
- Ciencia de los materiales Ciencia de los materiales.
Sus antecedentes:
- El espectro del infrarrojo medio (MIR) (3-14 μm) es crucial para la espectroscopia molecular y la comunicación óptica en el espacio libre.
- Los avances en fotónica MIR se ven obstaculizados por la falta de moduladores integrados de alto rendimiento.
Objetivo del estudio:
- Para abordar la necesidad de moduladores avanzados en la región MIR.
- Para demostrar un nuevo modulador electro-óptico integrado para aplicaciones MIR.
Principales métodos:
- Fabricación de un niobato de litio en el modulador electro-óptico Mach-Zehnder de zafiro.
- Caracterización del rendimiento del modulador, incluido el ancho de banda, la relación de extinción y VπL.
- Demostración de la transmisión de datos y la generación del peine de frecuencia en longitudes de onda MIR.
Principales resultados:
- El modulador opera en banda ancha desde 3.95 hasta 4.5 μm.
- Se logró un ancho de banda de 3 dB superior a 20 GHz, una relación de extinción de 17 dB y VπL de 22 V·cm.
- Se ha demostrado con éxito la transmisión de datos de 10 Gbit/s y una frecuencia de banda ancha de 70 GHz.
Conclusiones:
- El modulador desarrollado ofrece una combinación única de integración, baja pérdida, alta relación de extinción y operación de alta velocidad en el MIR.
- Este avance allana el camino para sistemas fotónicos MIR mejorados para la espectroscopia y la comunicación.
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