Author(s): Li, GY (Li, Guangyi); Wang, L (Wang, Lu); Zhu, S (Zhu, Sha); Li, M (Li, Ming); Zhu, NH (Zhu, Ninghua); Li, W (Li, Wei)
Source: IEEE PHOTONICS TECHNOLOGY LETTERS Volume: 32 Issue: 10 Pages: 599-602 DOI: 10.1109/LPT.2020.2986475 Published: MAY 15 2020
Abstract: We propose a photonic scheme to generate dual-chirp microwave waveforms based on a widely tunable optoelectronic oscillator (OEO) using a dual-polarization dual-drive Mach-Zehnder modulator (DP-DDMZM). The upper DDMZM is properly biased to serve as a phase modulator and further constructs OEO loop to generate radio frequency (RF). The lower DDMZM injected by the combination of the RF and a single-chirp signal is utilized to generate a dual-chirp microwave waveform with an arbitrarily tunable central frequency. The RF from the OEO replaces external millimeter-wave source in our scheme, which improves the phase noise performance of RF in high-frequency range, alleviates the complexity of the system, and increases the possibility of integration. Dual-chirp microwave waveforms centered at 10 GHz with a bandwidths of 0.4 GHz and 1 GHz, and centered at 15 GHz with a bandwidth of 0.4 GHz are successfully generated. The proposed scheme is theoretically analyzed and experimentally demonstrated.
Accession Number: WOS:000529919900003
ISSN: 1041-1135
eISSN: 1941-0174
Full Text: https://ieeexplore.ieee.org/document/9060918