Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/91973
Title: Spatially encoded multibeam laser Doppler vibrometry using a single photodetector
Authors: Fu, Yu
Guo, Min
Phua, Poh Boon
Keywords: DRNTU::Science::Physics::Optics and light
Issue Date: 2010
Source: Fu. Y., Guo, M., & Phua, P. B. (2010). Spatially encoded multibeam laser Doppler vibrometry using a single photodetector, Optics Letters, 35(9), 1356-1358.
Series/Report no.: Optics letters
Abstract: A laser Doppler vibrometer with single photodetector is introduced to measure the vibration on multiple points of target simultaneously. A 2 5 beam array with various frequency shifts is generated by three acousto-optic devices, illuminating different points on a vibrating object. The reflected beams interfere with a reference beam on a high-speed photodetector, and the signal is amplified and digitized with a rate of 500 megasamples/s. To extract vibration information of different points, the carrier frequencies of each beam are elaborately designed so that they can be separated from cross-talk regions in the spectrum. The experimental results are compared with that from a commercial single-point vibrometer, and the comparison shows that it is possible to do a precise measurement on multiple points simultaneously using a single photodetector.
URI: https://hdl.handle.net/10356/91973
http://hdl.handle.net/10220/6463
ISSN: 0146-9592
DOI: 10.1364/OL.35.001356
Rights: This paper was published in [Optics Letters] and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: [http://www.opticsinfobase.org/abstract.cfm?URI=ol-35-9-1356]. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:TL Journal Articles

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