Direction-resolved homodyne laser-Doppler vibrometry by analyzing space-time fringes created by the successive 1D intensity profiles of the interference fringes

Daemi, Mohammad Hossein; Rasouli, Saifollah

doi:10.1364/ol.44.005824

Opt. Lett.

2019

DOI: 10.1364/ol.44.005824

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Direction-resolved homodyne laser-Doppler vibrometry by analyzing space-time fringes created by the successive 1D intensity profiles of the interference fringes

Mohammad Hossein Daemi

Saifollah Rasouli

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Cited by 4 publications

References 11 publications

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Remote Vector Velocimetry with Fiber‐Delivered Scalar Fields

Tang,

Wan,

Zhang

et al. 2024

Laser & Photonics Reviews

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The Doppler effect reveals the law that light waves undergo frequency changes in interacting with motion, which is highly significant in velocity detection and has applications in fields such as astrophysics, aerospace, and advanced manufacturing. A typical Doppler velocimetry involves illuminating a moving object with interference fringes generated based on phase gradients while detecting the frequency shift of scattered light to determine the velocity. Beyond the spatial phase distributions, the spatial amplitude is a unique dimension of light fields that can be directly controlled, but its application prospects in motion detection are rarely revealed, particularly in both the magnitude and orientation of velocity measurements. In this work, a remote vector velocimeter based on spatially structured amplitude fields is proposed for monitoring angular velocities of objects in situ. Guided through a 40 km seven‐core fiber, the structured beams with spatially‐distributed amplitude are constructed at the remote fiber facet by adjustable mode excitation in outer cores, and the Doppler signals reflected by the target are collected and transmitted back by the inner core, enabling the remote measurement of rotational motion vectors with a probe‐signal‐integrated configuration. These results suggest the great potential of spatial amplitude fields in motion detection, the cost‐efficient and compact velocimetry may contribute to the communities of optical sensing and engineering.

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Remote Vector Velocimetry with Fiber‐Delivered Scalar Fields

Tang,

Wan,

Zhang

et al. 2024

Laser & Photonics Reviews

View full text Add to dashboard Cite

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Precision Position Measurement of PMSLM Based on ApFFT and Temporal Sinusoidal Fringe Pattern Phase Retrieval

Zhao

Zhou

Zhao

et al. 2020

IEEE Trans. Ind. Inf.

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Full-field laser heterodyne imaging vibrometry using a CMOS–DVR system

et al. 2021

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A laser heterodyne imaging vibrometry is proposed for full-field vibration measurement. The vibration responses are imaged and recorded using a CMOS camera and a digital video recorder. A digital demodulation method based on a cumulative distribution function and autocorrelation is designed to demodulate signals affected by speckle noise. The experimental investigations confirm the viability of the proposed method for vibration measurement. Meanwhile, a comparison with laser Doppler vibrometry is performed to further validate the method. The results prove the proposed vibrometry is an effective and precise option for full-field vibration measurement.

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Direction-resolved homodyne laser-Doppler vibrometry by analyzing space-time fringes created by the successive 1D intensity profiles of the interference fringes

Cited by 4 publications

References 11 publications

Remote Vector Velocimetry with Fiber‐Delivered Scalar Fields

Remote Vector Velocimetry with Fiber‐Delivered Scalar Fields

Precision Position Measurement of PMSLM Based on ApFFT and Temporal Sinusoidal Fringe Pattern Phase Retrieval

Full-field laser heterodyne imaging vibrometry using a CMOS–DVR system

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