Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

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

Version 1 : Received: 25 January 2021 / Approved: 26 January 2021 / Online: 26 January 2021 (09:57:01 CET)

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 (doi: 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 (doi: 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.

Subject Areas

radio frequency; microwave; spectrum analyzer; integrated; photonic

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