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Ultra-Wideband RF-Photonics Technology for Microwave Spectrometry
- Source :
- IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, Vol 17, Pp 16100-16107 (2024)
- Publication Year :
- 2024
- Publisher :
- IEEE, 2024.
-
Abstract
- We describe an RF-photonic system architecture to measure microwave spectrum over a wide bandwidth with high resolution. The approach relies on the up-conversion of the electronic signal to the optical domain using a high-speed electro-optic modulator, and an arrayed-waveguide grating (AWG) for spectral analysis. The modulator is implemented in lithium niobate whereas the AWG takes the form of a photonic integrated circuit fabricated in a silicon-on-insulator material platform. We present experimental results showing high-frequency response, in excess of 200 GHz, for the modulator, and broadband response of the AWG with the free spectral range of 81 GHz. The system is suitable for the measurement of atmospheric radiation between the oxygen and water vapor absorption lines for the monitoring of the planetary boundary layer to aid in weather prediction and the modeling of climate dynamics.
Details
- Language :
- English
- ISSN :
- 19391404 and 21511535
- Volume :
- 17
- Database :
- Directory of Open Access Journals
- Journal :
- IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.b51ee7c15934487a84649d38742bb605
- Document Type :
- article
- Full Text :
- https://doi.org/10.1109/JSTARS.2024.3452033