Research Article

Distributed Temperature Sensing System Based on Brillouin Scattering Effect Using a Single-Photon Detector

Figure 2

Experimental setup of distributed Brillouin temperature sensing system based on single-photon detector. EOM, electro-optic modulator; FUT, fiber under test; PC, polarization controller; AFG, arbitrary function generator; SPD, single-photon detector; FBG, fiber Bragg grating; VOA, variable optical attenuator; TCSPC, time-correlated single-photon counting; CIR, circulator; PS, polarization scrambler; OS, optical switch.