TRABALHOS PUBLICADOS
2025 |
Proposal for an All-Optical Intra-Pulse Instantaneous Frequency Measurement Proceedings Article Gonçalves, André Paim; Marins, Felipe Araújo; Olivieri, Danilo M.; Ribeiro, Ricardo Marques; Ivo, Felipe Streitenberger; Coutinho, Olympio Lucchini Resumo | Links | BibTeX | Tags: Instantaneous Frequency Measurement (IFM), Instantaneous Wideband, Microwave Photonics @inproceedings{Goncalves2025ProposalAllOptical,This article presents a new concept of Instantaneous Frequency Measurement (IFM) performed at the receiver, which is based on Microwave Photonics. The implementation of IFM has the capability of measuring RF intra-pulse parameters. The proposed optical circuit is based on the concept of optical self-homodyning, where the carrier and one of the sidebands are eliminated. The remaining sideband is inserted into an MZI with arms of different sizes coupled to a low-speed photodetector. This process produces a tone increased by the spectral components of the measured RF signal envelope because of the spectral components of the remaining sideband beating in the photodetector. The proposed optical circuit brings the benefit of employing simpler digitizers, reducing system latency, and has the possibility of being transformed into a photonic integrated circuit (PIC). It was predicted by mathematical deduction, and the concept was experimentally confirmed. |