Dual-Channel All-Optical Modulator Utilizing Colloidal InSb/SiO2 Quantum Dot Semiconductor Optical Amplifiers with Enhanced Modulation Depth
Subject Areas : Journal of Optoelectronical Nanostructures
Mohammad Faraji
1
,
Hannaneh Dortaj
2
*
,
Samiye Matloub
3
1 - Quantum and Photonic Research Lab., Faculty of Electrical and Computer Engineering, University of Tabriz, Tabriz, Iran
2 - Quantum and Photonic Research Lab., Faculty of Electrical and Computer Engineering, University of Tabriz, Tabriz, Iran
3 - Quantum and Photonic Research Lab., Faculty of Electrical and Computer Engineering, University of Tabriz, Tabriz, Iran
Keywords: All optical modulator, Modulation depth, Optical amplifiers, Quantum dot, Solution-processed,
Abstract :
Quantum dot semiconductor optical amplifiers (QD-SOAs) are promising candidates, yet achieving high modulation depth and gain simultaneously in dual-channel AOMs remains a challenge. Existing studies often focus on single-channel modulation or lack optimization across multiple wavelengths. This paper proposes a dual-channel AOM based on a solution-processed InSb/SiO₂ QD-SOA, designed to modulate and amplify 1.31 and 1.55µm wavelengths simultaneously. A self-consistent solution of the 3D Schrödinger equation is used for modal analysis, while coupled rate and propagation equations evaluate device performance. The results demonstrate nearly 100% modulation depth and gains of 17.94 dB and 17.14 dB at a pump power density of 500 W/cm². These findings highlight the potential of solution-processed QD-SOAs for cost-effective, high-performance optical modulation, addressing key challenges in next-generation optical networks.
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