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Content Provider | IEEE Xplore Digital Library |
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Author | Zabit, U. Bernal, O.D. Bosch, T. |
Copyright Year | 2012 |
Description | Author affiliation: Univ de Toulouse, INP, LAAS, F-31400 Toulouse, France (Zabit, U.; Bernal, O.D.; Bosch, T.) |
Abstract | In this paper, a novel time-frequency signal processing approach is presented for a Self-Mixing (SM) interferometric Laser Diode (LD) sensor that enables measurement of harmonic and arbitrarily shaped vibrations. The proposed time-frequency technique ameliorates the measurement precision of a previously published time-domain based displacement retrieval technique called the Phase Unwrapping Method (PUM). By incorporating a frequency-domain analysis to the PUM, we not only improve the measurement precision but also recover information about target movement harmonics that can be used for modal analysis applications. In addition, the time-frequency processing has been found to be robust in case of variations in optical feedback coupling factor. The time-frequency technique has thus provided a precision of approx. 15nm rms (while that of PUM is approx. 40nm rms) for micrometric harmonic and arbitrarily shaped vibrations by using a SM sensor based on a LD emitting at 785nm. |
Starting Page | 1 |
Ending Page | 4 |
File Size | 1421414 |
Page Count | 4 |
File Format | |
ISBN | 9781457717666 |
ISSN | 19300395 |
e-ISBN | 9781457717673 |
e-ISBN | 9781457717659 |
DOI | 10.1109/ICSENS.2012.6411122 |
Language | English |
Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
Publisher Date | 2012-10-28 |
Publisher Place | Taiwan |
Access Restriction | Subscribed |
Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
Subject Keyword | Vibrations Diode lasers Time frequency analysis Semiconductor lasers Harmonic analysis Optical feedback |
Content Type | Text |
Resource Type | Article |
Subject | Electrical and Electronic Engineering |
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