Heterodyne Doppler velocity measurement of moving targets by mode-locked pulse laser

Yan, Binbin; Ren, Deming; Zhao, Wenzhi; Qu, Yanchen; Qian, Liming; Chen, Zhenlei

doi:10.1364/oe.20.000764

Cited by 17 publications

(12 citation statements)

References 13 publications

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“…Our method could also be useful to build Lidar-Radar architecture with promising sources recently used in coherent Doppler lidar systems, such as mode-locked lasers [18] or compact fiber lasers [19].…”

Section: Resultsmentioning

confidence: 99%

Lidar–radar velocimetry using a pulse-to-pulse coherent rf-modulated Q-switched laser

et al. 2013

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An rf-modulated pulse train from a passively Q-switched Nd:YAG laser has been generated using an extra-cavity acousto-optic modulator. The rf modulation reproduces the spectral quality of the local oscillator. It leads to a high pulse-to-pulse phase coherence, i.e., phase memory, over thousands of pulses. The potentialities of this transmitter for lidar-radar are demonstrated by performing Doppler velocimetry on indoor moving targets. The experimental results are in good agreement with a model based on elementary signal processing theory. In particular, we show experimentally and theoretically that lidar-radar is a promising technique that allows discrimination between translation and rotation movements. Being independent of the laser internal dynamics, this scheme can be applied to any Q-switched laser.

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Section: Resultsmentioning

confidence: 99%

Lidar–radar velocimetry using a pulse-to-pulse coherent rf-modulated Q-switched laser

et al. 2013

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“…Strand [12] used a 1550 nm fiber laser to measure the velocity of a target moving at 1000 m/s. Bai [13] proposed a theoretical model for Doppler velocity measurement using mode-locked lasers. Their approach was then applied to velocity measurements around 20 m/s with a 1064 nm laser.…”

Section: Introductionmentioning

confidence: 99%

Compact system for in situ laser Doppler velocimetry of blood flow

Bou¹,

Ly²,

Roul³

et al. 2019

Biomed. Opt. Express

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This work describes the implementation of a compact system allowing measurement of blood flow velocity using laser Doppler velocimetry in situ. The compact setup uses an optical fiber acting as an emitter and receptor of the signal. The signal is then recovered by a photodiode and processed using a spectrum analyzer. The prototype was successfully tested to measure microbead suspension and whole blood flow velocities in a fluidic chip. Fibers with hemispherical lenses with three different radius of curvature were investigated. This simple yet precise setup would enable the insertion of the fiber via a medical catheter to monitor blood flow velocity in non superficial vessels where previous reported techniques cannot be implemented.

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“…Moreover, the heterodyne Doppler velocity measurement of moving targets by mode-locked pulse laser has been reported, 13 in which the coherent beat frequency of the signal light reflected by target and local oscillation light occurred on the surface of the detector, where the velocity measurement has a high precision and the error on average is within 0.4 m/s. Hirschberger and Ehret 14 have proposed the simulation and high-precision wavelength determination of noisy 2D Fabry-Perot interferometric rings for direct-detection Doppler lidar and laser spectroscopy.…”

Section: Introductionmentioning

confidence: 99%

Doppler shift velocimetry using two point probe nested-microring resonators

Jomtarak

Yupapin

Ali

2015

J. Nonlinear Optic. Phys. Mat.

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In this paper, a micro Doppler shift velocimeter using two nested-microring resonators incorporating two gratings is designed and simulated. Two wavelength light pulse can be generated by a single input wavelength source after travelling through the two defect grating. Whispering gallery mode of light pulses are localized within the nested-microring resonators, which can be used to form the two point probe Doppler shift velocimeter. The shifted frequency (velocity) can be obtained by the difference of optical path length between two point probes, where the relative velocity of Doppler frequency shift velocimeter can be obtained. The light absorption behaviors can also be investigated by the different light output spectrum. The obtained simulation results shows that the relative velocities of the reflection and transmission light intensities are ranged from 10 4 m/s to 10 5 m/s, which can be useful for Doppler frequency shift velocimeter and sensors, where the micro-optical device and multi-functions are the advantages.

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Heterodyne Doppler velocity measurement of moving targets by mode-locked pulse laser

Cited by 17 publications

References 13 publications

Lidar–radar velocimetry using a pulse-to-pulse coherent rf-modulated Q-switched laser

Lidar–radar velocimetry using a pulse-to-pulse coherent rf-modulated Q-switched laser

Compact system for in situ laser Doppler velocimetry of blood flow

Doppler shift velocimetry using two point probe nested-microring resonators

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