Optical ultrasound imaging is a new medical imaging technique that offers higher resolutionand higher contrast than conventional ultrasound imaging techniques.Currently,optical ultrasound imaging typically acquires ultrasound signals with a single transducer and uses a mechanical scanning field of view for ultrasound imaging.However,this leads to relatively long scan times and low frame speeds.To solve this problem,this paper proposes an arrayed fiber-optic ultrasound sensing system based on both Fabry-Perot(F-P)interference and laser Doppler vibrometry principles.Multiple fiber-optic sensing units are used to acquire and process signals in parallel to achieve fast optical ultrasound imaging.The sensing systems are built and ultrasound sensing experiments are performed.The results show that the F-P interferometric system has higher sensitivity and achieves an imaging speed of 10 frames per second.The laser Doppler vibrometry system is more suitable for parallel sensing of all channels,with an imaging speed of 100 frames per second. This study achieves fast optical ultrasound imaging,which pioneers the use of fiber-optic sensing systems for parallel ultrasound sensing.This has great potential for non-destructive testing and biomedical ultrasound imaging.