光电子快报(英文版), 2023, 19 (3): 174, Published Online: Mar. 18, 2023
Broadband tunable instantaneous frequency measurement system based on stimulated Brillouin scattering
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.
LIAO Weijie, ZHANG Jiahong, and CAI Qibin. Broadband tunable instantaneous frequency measurement system based on stimulated Brillouin scattering[J]. 光电子快报(英文版), 2023, 19(3): 174.