Measurement of Ultra-High Speed by Optical Multistage Cascade Frequency Reduction Technology

In order to reduce the frequency of high-frequency Doppler signal light, the electronic bandwidth of a data acquisition system is reduced. This paper mainly describes the principle and experimental verification results of optical multistage cascade frequency reduction technology. The bandwidth requi...

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Bibliographic Details
Published in:Applied sciences 2024-12, Vol.14 (23), p.10771
Main Authors: Ma, Heli, Chen, Long, Gu, Wei, Liu, Cangli, Tang, Longhuang, Jia, Xing, Tao, Tianjiong, Liu, Shenggang, Chen, Yongchao, Wang, Xiang, Wu, Jian, Li, Chengjun, Liu, Dameng, Weng, Jidong, Liu, Huan
Format: Article
Language:English
Subjects:
Bandwidths
Doppler effect
frequency reduction
laser interferometer
Lasers
Recording equipment
shock loading
Signal to noise ratio
Simulation
Software
Spectrum allocation
ultra-high speed
Velocity
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Summary:In order to reduce the frequency of high-frequency Doppler signal light, the electronic bandwidth of a data acquisition system is reduced. This paper mainly describes the principle and experimental verification results of optical multistage cascade frequency reduction technology. The bandwidth requirement of the detector and the oscilloscope is reduced by the method of “relaying” the measured beat frequency signal between multiple electronic channels. Aiming to achieve the requirement of ultra-high speed measurement of 22 km/s, the requirement of the original signal frequency as high as 28 GHz electrical bandwidth is reduced to the acquisition and recording system with only 8 GHz bandwidth. A complete velocity profile of up to 11.47 km/s is measured on a three-stage light gas gun with velocity measurement accuracy of 1%.
ISSN:2076-3417
2076-3417
DOI:10.3390/app142310771