Fig. 6
From: A framework for spontaneous Brillouin noise: unveiling fundamental limits in Brillouin metrology
Single-pulse BOTDR experimental configuration and results. a Experimental configuration of single-pulse BOTDR based on PMF. FPGA: field-programmable gate array; SOA: semiconductor optical amplifier; EDFA: erbium-doped fiber amplifier; EOM: electro-optic modulator; ILP: in-line polarizer; PD: photodetector; OSC: oscilloscope. b Measured SNR surfaces representing SNR distribution along a 400 m-long PM fiber for spatial resolutions of 1 m, 2 m, 6 m, and 10 m, respectively. The different values of the SNR are represented by the different colors on the colorbar to the right. c Correspondence between the theoretically calculated and experimentally measured SNR values for a 400 m PMF, covering spatial resolutions of 1 m, 2 m, 6 m and 10 m. d Theoretical SNR behavior of a 400 m PMF under the combined influence of varying spatial resolutions and pump pulse powers. e Correspondence between the theoretically calculated and experimentally measured SNR values for a 1.9 km standard SMF, following the same parameter settings and adjustment logic as in (c). f Theoretical SNR behavior of a 1.9 km standard SMF under the combined influence of various spatial resolutions and various pump pulse powers
