Ultracompact silicon optomechanical cavities as optical upconverters of OFDM wireless signals

Laura Mercadé; Maria Morant; Roberto Llorente; Alejandro Martínez

doi:10.1117/12.2581497

5 March 2021 Ultracompact silicon optomechanical cavities as optical upconverters of OFDM wireless signals

Laura Mercadé, Maria Morant, Roberto Llorente, Alejandro Martínez

Proceedings Volume 11685, Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications XIV; 116850J (2021) https://doi.org/10.1117/12.2581497
Event: SPIE OPTO, 2021, Online Only

Abstract

Silicon optomechanical (OM) cavities have been presented as relevant elements in microwave photonics and optical RF processing, particularly in applications requiring low-weight and compactness. In this work, we introduce and demonstrate a new functionality by employing a silicon OM crystal cavity operated in the phonon lasing regime for optical upconversion of a radio-frequency data signal employing orthogonal frequency division multiplexing (OFDM) modulation. The OM crystal cavity is created on suspended silicon nano-beams with one-dimensional (1D) periodicity with <10μm² foot-print. The proposed OM crystal cavity operates as an optoelectronic oscillator at the GHz regime, with a low phase noise for the first harmonic at 3.9 GHz in the self-sustained oscillation regime. The OM crystal cavity characterization indicates that the optical resonance is centered at 1541.2±0.3 nm with a loaded optical quality factor Q_o ≈ 4×10³. Using such cavity we demonstrate successful upconversion of full-standard IEEE 802.16e WiMAX signals employing OFDM with QPSK modulation per-carrier over different bandwidths.

Conference Presentation

Citation Download Citation

Laura Mercadé, Maria Morant, Roberto Llorente, and Alejandro Martínez "Ultracompact silicon optomechanical cavities as optical upconverters of OFDM wireless signals", Proc. SPIE 11685, Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications XIV, 116850J (5 March 2021); https://doi.org/10.1117/12.2581497

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