LIAO Weijie,ZHANG Jiahong,CAI Qibin.Broadband tunable instantaneous frequency measurement system based on stimulated Brillouin scattering[J].Optoelectronics Letters,2023,(3):174-178 Broadband tunable instantaneous frequency measurement system based on stimulated Brillouin scattering Author Name Affiliation LIAO Weijie  Faculty of Information Engineering and Automation, Kunming University of Science and Technology, Kunming 650500, China  ZHANG Jiahong  Faculty of Information Engineering and Automation, Kunming University of Science and Technology, Kunming 650500, China  CAI Qibin  Faculty of Information Engineering and Automation, Kunming University of Science and Technology, Kunming 650500, China  Abstract:       A broadband tunable instantaneous frequency measurement (IFM) system is designed based on the stimulated Brillouin scattering effect of the highly nonlinear fiber in which the carrier suppressed single sideband modulated signal of the Brillouin frequency shift acts as pump light. The amplitude comparison function (ACF) is constructed by the power radio of the two paths in the system. The frequency measurement range and measurement accuracy can be tuned by changing the frequency difference of the two phase modulation signals. The tunable frequency measurement ranges of 2—5 GHz, 2—10 GHz, 2—15 GHz, 2—20 GHz, and 2—24 GHz are realized, and the corresponding measurement accuracies are 3.64 dB/GHz, 2.17 dB/GHz, 1.87 dB/GHz, 1.22 dB/GHz, and 0.77 dB/GHz, respectively. Hits: 315 Download times: 0 View Full Text    Download reader