@inproceedings{a9b9981b1e254b2195ba735faba316d1,
title = "Chip-based RF Photonic Notch Filter for Deep Rejection of Multi-Band Interfering Signals",
abstract = "Radio frequency (RF) filters that operate over wide frequency ranges with multiple notches are demanded by modern RF applications. Filters based on RF photonics are an attractive alternative compared to conventional RF electronic filters due to their frequency agility and tunability. However, the implementation of multi-band, high-performance notch filters has not been demonstrated due to limitations of previous filtering schemes and on-chip device performance. Here, we overcome these limitations by cascading an active on-chip Brillouin As2 S3 waveguide and multiple passive, low-loss Si3 N4 micro-ring resonators. In doing so, we produce multiple RF stopbands with frequency tunability over 20 GHz, low passband losses of 8 dB, 500 MHz 3dB bandwidth, and ultra-deep rejection exceeding 40 dB. We experimentally demonstrate the feasibility of the multi-band notch filter for both analog RF photonic filtering and image rejection for RF communication receivers.",
keywords = "Integrated optics, Nonlinear optics, Radio frequency photonics",
author = "Matthew Garrett and Yang Liu and Moritz Merklein and Choi, \{Duk Yong\} and Kunlun Yan and Madden, \{Stephen J.\} and Eggleton, \{Benjamin J.\}",
note = "Publisher Copyright: {\textcopyright} 2021 IEEE.; 2021 International Topical Meeting on Microwave Photonics, MWP 2021 ; Conference date: 15-11-2021 Through 17-11-2021",
year = "2021",
doi = "10.1109/MWP53341.2021.9639428",
language = "English",
series = "2021 International Topical Meeting on Microwave Photonics, MWP 2021",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
booktitle = "2021 International Topical Meeting on Microwave Photonics, MWP 2021",
address = "United States",
}