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Proceedings Paper

FPGA based design for real-time measurement of alpha
Author(s): Zhenghao Liu; Yanguang Yu; Qinghua Guo; Jiangtao Xi; Jun Tong; Sheng Tong
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Paper Abstract

Self-mixing interferometry (SMI) is considered both efficient and accurate for alpha factor measurement. In this work, a high-performance filtering method and effective data processing algorithms are combined to optimise the measurement accuracy on the frequency-domain based alpha measurement method. In order to achieve fast real-time measurement, FPGA (Field Programmable Gate Arrays) is employed for the implementation of the proposed algorithms. The FPGA design includes noise reduction, SMI signal normalisation, phase signal detection, spectrum calculation and alpha estimation. The results show that the FPGA based design can achieve fast and reliable alpha factor measurement.

Paper Details

Date Published: 3 December 2014
PDF: 10 pages
Proc. SPIE 9267, Semiconductor Lasers and Applications VI, 92670S (3 December 2014); doi: 10.1117/12.2071308
Show Author Affiliations
Zhenghao Liu, Univ. of Wollongong (Australia)
Yanguang Yu, Univ. of Wollongong (Australia)
Qinghua Guo, Univ. of Wollongong (Australia)
Jiangtao Xi, Univ. of Wollongong (Australia)
Jun Tong, Univ. of Wollongong (Australia)
Sheng Tong, Univ. of Wollongong (Australia)

Published in SPIE Proceedings Vol. 9267:
Semiconductor Lasers and Applications VI
Ninghua Zhu; Werner H. Hofmann, Editor(s)

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