Abstract

We present a cost-effective gigahertz-wide arbitrary-shaped microwave photonic filter based on stimulated Brillouin scattering in fiber using a directly modulated laser (DML). After analyzing the relationship between the spectral power density and the modulation current of the DML, we manage to precisely adjust the optical spectrum of the DML, thereby controlling the Brillouin filter response arbitrarily for the first time, to the best of our knowledge. The filter performance is evaluated by amplifying a 500 Mb/s non-return-to-zero on-off keying signal using a 1 GHz rectangular filter. The comparison between the proposed DML approach and the previous approach adopting a complex IQ modulator shows similar filter flexibility, shape fidelity, and noise performance, proving that the DML-based Brillouin filter technique is a cost-effective and valid solution for microwave photonic applications.

© 2017 Optical Society of America

High-input dynamic range and selectivity stimulated Brillouin scattering-based microwave photonic filter utilizing a dual-stage scheme

Ke Zhang, Yibo Zhong, Changjian Ke, and Deming Liu
Opt. Lett. 42(17) 3287-3290 (2017)

Tailoring of the Brillouin gain for on-chip widely tunable and reconfigurable broadband microwave photonic filters

Amol Choudhary, Iman Aryanfar, Shayan Shahnia, Blair Morrison, Khu Vu, Stephen Madden, Barry Luther-Davies, David Marpaung, and Benjamin J. Eggleton
Opt. Lett. 41(3) 436-439 (2016)

Microwave photonic filter with a sub-kHz bandwidth based on a double ring Brillouin fiber laser

Linyi Wang, Yi Liu, Yajun You, Wenjun He, Xin Xu, Liuyan Feng, Wenping Geng, and Xiujian Chou
Opt. Lett. 47(16) 4143-4146 (2022)

Ultrahigh-Q and tunable single-passband microwave photonic filter based on stimulated Brillouin scattering and a fiber ring resonator

Hua Shun Wen, Ming Li, Wei Li, and Ning Hua Zhu
Opt. Lett. 43(19) 4659-4662 (2018)

Time-varying microwave photonic filter for arbitrary waveform signal-to-noise ratio improvement

Dong Ma and Yang Chen
Opt. Lett. 47(9) 2186-2189 (2022)