Broadband instantaneous frequency measurement based on stimulated Brillouin scattering

作者：Xin Long, Weiwen Zou * ,And Jianping Chen
摘要：A technique for the instantaneous frequency measurement (IFM) of broadband signals is proposed based on stimulated Brillouin scattering (SBS) in a single-mode optical fiber. The instantaneous frequency and amplitude information is obtained by the narrowband filtering of the acoustic-optic interaction in the SBS process. Through sideband management of the optical-modulation, the IFM bandwidth can be far beyond the Brillouin frequency shift (i.e. ~11 GHz in 1550 nm). Proof-of-concept experiments for both the linearly frequency modulated pulse and frequency Costas coded pulse are carried out to verify the feasibility of the IFM.
出版源：Optics Express, vol. 25, no. 3, pp. 5162-5171, Feb. 2017.