Sound source localization based on Michelson fiber optic interferometer array

Characterization of sensitivity of optical fiber cables to acoustic vibrations

“…Another article 35 deals with noise removal using MZI, MI, and -OTDR combined. For the MI, it is also possible to expand the number of arms, which makes it possible to localize the sound source 36 .…”

Optical ultrasound sensors for photoacoustic imaging: a narrative review

“…It is required to lock the system at the highest sensitivity for mitigation of perturbation, which slows down the imaging speed in return. Multiport optical couplers were employed to overcome this challenge in novel quadrature detection, such as 3×3 couplers (114,115). This kind of couplers has an intrinsic phase difference of 120°.…”

Research on sound source localization of fiber optic FP cavity microphone based on TDOA

“…The average positioning error of the system in the horizontal direction and in the vertical direction was0.25 cm and 0.45 cm, respectively. In the same year, Wang et al [8] proposed a fiber-optic acoustic sensor array based on Michelson interference, the positioning accuracy can reach 1 cm in 60 cm×60 cm. In 2020, Hayber et al [9] used polymer diaphragm materials to form an optic fiber sensor array and applied genetic algorithm to obtain the position coordination of the sound source with a maximum positioning error of 2.48 cm in 1 m×1 m×1 m. In 2021, Wu et al [10] developed a highly sensitive metal diaphragm omnidirectional fiber optic acoustic sensor and designed a cross shaped fiber optic sensor array that was capable of capturing acoustic fingerprints of drones within a 300 m range, achieving accurate recognition of drones over a wide range.…”