A Fading Noise Suppression Method Based on Frequency-Shift Loop in TGD-OFDR System
Yimin Luo, Qingwen Liu, Chaozhu Liu, Xinyu Fan, Zuyuan He · 2024
A frequency-shift loop is introduced in the TGD-OFDR-based DAS system, by which fading noise suppression and high-frequency response are achieved without sacrificing spatial resolution. Semiconductor optical amplifier is employed in the loop to avoid transient response.