Author(s): Wen, HS (Wen, Hua Shun); Xu, BR (Xu, Bo Rui); Zhai, KP (Zhai, Kun Peng); Sun, JZ (Sun, Jia Zheng); Wang, J (Wang, Jian); Du, XH (Du, Xin Hao); Jin, Y (Jin, Ya); Chen, W (Chen, Wei); Li, W (Li, Wei); Zhu, NH (Zhu, Ning Hua); Li, M (Li, Ming)

Source: OPTICS EXPRESS Volume: 29 Issue: 18 Pages: 28725-28740 DOI: 10.1364/OE.436173 Published: AUG 30 2021

Abstract: Microwave photonic filters (MPFs) with only one ultra-narrow passband are able to provide high frequency selectivity and wide spectral range, and they are of great importance in radio-frequency (RF) signal processing. However, currently all MPFs are limited by trade-offs between key parameters such as spectral resolution and range, tunability, and stability. Here, we report the first demonstration of a single passband MPF with unprecedented performance including ultrahigh spectral resolution of 650 kHz, 0-40 GHz spectral range, and high stability of center frequency drifting within +/- 50 kHz. This record performance is accomplished by breaking the amplitude equality of a phase-modulated signal via a Brillouin dynamic grating (BDG) which has an ultra-narrow reflection spectrum of sub-MHz. The results point to new ways of creating high performance microwave photonic systems, such as satellite and mobile communications, radars, and remote-sensing systems. (C) 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

Accession Number: WOS:000691863500059

ISSN: 1094-4087

Full Text: https://www.osapublishing.org/oe/fulltext.cfm?uri=oe-29-18-28725&id=458041