Transactions of Nanjing University of Aeronautics & Astronautics
FBS Effect and Temperature Dependence in Trench-Assisted Multimode Fiber
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Abstract:
We propose the trench-assisted multimode fiber （TA-OM4） as a novel sensing fiber in forward Brillouin scattering （FBS）-based temperature sensor， due to its higher temperature sensitivity， better bending resistance and lower propagation loss， compared with the single mode fiber （SMF） and other sensing fibers. The FBS effect and acousto-optic interaction in TA-OM4 are the first time to be demonstrated and characterized at 1 550 nm theoretically and experimentally. A 2.0 km long TA-OM4 is put into an oven to measure its temperature sensitivity， which can reach up to 80.3 kHz/℃， exceeding 53% of SMF （52.4 kHz/℃）. The simulated and experimental results verify that the TA-OM4 may be a good candidate as the sensing fiber for the FBS-based temperature sensor.
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This work was supported in part by the National Natural Foundation of China （Nos.61875086， 61377086）， the Aerospace Science Foundation of China （No.2016ZD52042）， and Nanjing University of Aeronautics and Astronautics Ph.D. short-term visiting scholar project （No.190901DF08）.
Clc Number:
TN29
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