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Article Dans Une Revue Scientific Reports Année : 2020

Wideband tunable microwave signal generation in a silicon-micro-ring-based optoelectronic oscillator

Résumé

Abstract Si photonics has an immense potential for the development of compact and low-loss opto-electronic oscillators (OEO), with applications in radar and wireless communications. However, current Si OEO have shown a limited performance. Si OEO relying on direct conversion of intensity modulated signals into the microwave domain yield a limited tunability. Wider tunability has been shown by indirect phase-modulation to intensity-modulation conversion. However, the reported tuning range is lower than 4 GHz. Here, we propose a new approach enabling Si OEOs with wide tunability and direct intensity-modulation to microwave conversion. The microwave signal is created by the beating between an optical source and single sideband modulation signal, selected by an add-drop ring resonator working as an optical bandpass filter. The tunability is achieved by changing the wavelength spacing between the optical source and a resonance peak of the resonator. Based on this concept, we experimentally demonstrate microwave signal generation between 6 GHz and 18 GHz, the widest range for a Si-micro-ring-based OEO. Moreover, preliminary results indicate that the proposed Si OEO provides precise refractive index monitoring, with a sensitivity of 94350 GHz/RIU and a potential limit of detection of only 10 −8 RIU, opening a new route for the implementation of high-performance Si photonic sensors.
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Origine : Publication financée par une institution

Dates et versions

hal-04412161 , version 1 (04-04-2024)

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Phuong Do, Carlos Alonso-Ramos, Xavier Le Roux, Isabelle Ledoux, Bernard Journet, et al.. Wideband tunable microwave signal generation in a silicon-micro-ring-based optoelectronic oscillator. Scientific Reports, 2020, 10 (1), pp.6982. ⟨10.1038/s41598-020-63414-9⟩. ⟨hal-04412161⟩
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