All-Optical RF and Microwave Spectrum Analyzer with a 5 THz Bandwidth Based on CMOS-Compatible Waveguides

Yuhua Li; Zhe Kang; Kun Zhu; Shiqi Ai; Xiang Wang; Roy Davidson; Yan Wu Yan Wu; Roberto Morandotti; Brent Little; David Moss; Sai Chu

doi:10.20944/preprints202101.0529.v1

How to cite: Li, Y.; Kang, Z.; Zhu, K.; Ai, S.; Wang, X.; Davidson, R.; Yan Wu, Y.W.; Morandotti, R.; Little, B.; Moss, D.; Chu, S. All-Optical RF and Microwave Spectrum Analyzer with a 5 THz Bandwidth Based on CMOS-Compatible Waveguides. Preprints 2021, 2021010529. https://doi.org/10.20944/preprints202101.0529.v1 Li, Y.; Kang, Z.; Zhu, K.; Ai, S.; Wang, X.; Davidson, R.; Yan Wu, Y.W.; Morandotti, R.; Little, B.; Moss, D.; Chu, S. All-Optical RF and Microwave Spectrum Analyzer with a 5 THz Bandwidth Based on CMOS-Compatible Waveguides. Preprints 2021, 2021010529. https://doi.org/10.20944/preprints202101.0529.v1

Abstract

We report an all-optical radio-frequency (RF) spectrum analyzer with a bandwidth greater than 5 terahertz (THz), based on a 50-cm long spiral waveguide in a CMOS-compatible high-index doped silica platform. By carefully mapping out the dispersion profile of the waveguides for different thicknesses, we identify the optimal design to achieve near zero dispersion in the C-band. To demonstrate the capability of the RF spectrum analyzer, we measure the optical output of a femtosecond fiber laser with an ultrafast optical RF spectrum in the terahertz regime.

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Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

All-Optical RF and Microwave Spectrum Analyzer with a 5 THz Bandwidth Based on CMOS-Compatible Waveguides

Abstract

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Subject

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