Reconfigurable high-order radio frequency filters based on a wide-bandwidth optical frequency comb

Ying Luo; Xin Zhang; Yin Li; Qiaosong Cai; Jie Yang; Jianghua Zhang; Ke Yin; Tian Jiang

doi:10.1117/12.2600924

24 November 2021 Reconfigurable high-order radio frequency filters based on a wide-bandwidth optical frequency comb

Ying Luo, Xin Zhang, Yin Li, Qiaosong Cai, Jie Yang, Jianghua Zhang, Ke Yin, Tian Jiang

Proceedings Volume 12061, AOPC 2021: Infrared Device and Infrared Technology; 1206104 (2021) https://doi.org/10.1117/12.2600924
Event: Applied Optics and Photonics China 2021, 2021, Beijing, China

Abstract

We demonstrated the application of optical frequency combs in the realization of programmable microwave photonic filters. A reconfigurable high-order PF filter based on a wide-bandwidth optical frequency comb was designed, and the increasing of the tap (comb tooth) numbers results in the increasing of the order of the microwave photonic filter. In this article, the repetition frequency of the optical frequency comb is 12.5 GHz, and the optical spectral coverage reaches 25.6 nm. The order of the RF filter obtained in the experiment reaches 256, the free spectrum range (FSR) reaches 11 GHz, the 3dB-passband width is from 300 MHz to 2.6 GHz, and the sidelobe suppression is as high as 26 dB. A progressive optical pulse shaper was used to program the tap weights, which allow us to shape the bandpass of the filter. In addition, by adjusting the spectral distribution of the optical frequency comb, two types of RF filters with different passband shapes can be realized, namely, Gaussian and Sinc filters.

Citation Download Citation

Ying Luo, Xin Zhang, Yin Li, Qiaosong Cai, Jie Yang, Jianghua Zhang, Ke Yin, and Tian Jiang "Reconfigurable high-order radio frequency filters based on a wide-bandwidth optical frequency comb", Proc. SPIE 12061, AOPC 2021: Infrared Device and Infrared Technology, 1206104 (24 November 2021); https://doi.org/10.1117/12.2600924

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