FPGA based design for real-time measurement of alpha

Authors

Zhenghao Liu, University of WollongongFollow
Yanguang Yu, University of WollongongFollow
Qinghua Guo, University of WollongongFollow
Jiangtao Xi, University of WollongongFollow
Jun Tong, University of WollongongFollow
Sheng Tong, University of WollongongFollow

RIS ID

98497

Publication Details

Z. Liu, Y. Yu, Q. Guo, J. Xi, J. Tong & S. Tong, "FPGA based design for real-time measurement of alpha," in Proceedings of SPIE - Semiconductor Lasers and Applications VI, 2014, pp. 92670S-1-92670S-10.

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.