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Proceedings Paper

FPGA based filter design for self-mixing interferometry signals
Author(s): Yuan Sun; Yanguang Yu; Wenbin Fan; Jiangtao Xi
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Paper Abstract

Self-mixing interferometry (SMI) signals are observed from a sensing system consisting of a laser diode with external optical feedbacks. SMI signals carry the information associated to both of the displacement and parameters of the SL. To retrieve the information precisely, pre-processing of SMI signals is the first key step. For achieving real-time, and high quality sensing, this paper proposes a Field-programmable gate arrays (FPGA) based filtering and normalizing processing for SMI signals. According to the noise features contained in SMI signal, a median filter and a wavelet transform based filter are combined for our design. Hardware co-simulation verified that the performance for this FPGA used filter design.

Paper Details

Date Published: 22 November 2011
PDF: 7 pages
Proc. SPIE 8199, 2011 International Conference on Optical Instruments and Technology: Optical Sensors and Applications, 819909 (22 November 2011); doi: 10.1117/12.906577
Show Author Affiliations
Yuan Sun, Univ. of Wollongong (Australia)
Yanguang Yu, Univ. of Wollongong (Australia)
Wenbin Fan, Zhengzhou Univ. (China)
Jiangtao Xi, Univ. of Wollongong (Australia)


Published in SPIE Proceedings Vol. 8199:
2011 International Conference on Optical Instruments and Technology: Optical Sensors and Applications
Brian Culshaw; YanBiao Liao; Anbo Wang; Xiaoyi Bao; Xudong Fan, Editor(s)

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