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Influence of system bandwidth on self-mixing signal
Author(s): Bin Liu; Yuxi Ruan; Lingzhi Cao; Yanguang Yu; Jiangtao Xi; Qinghua Guo; Jun Tong
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Paper Abstract

Self-mixing interferometry (SMI) is a well-developed sensing technology. An SMI system can be described using a model derived from the well-known Lang and Kobayashi equations by setting the system operating in stable region. The features of an SMI signal are determined by the external optical feedback factor (denoted by C). Our recent work shows that when the factor C increases to a certain value, e.g. in moderate feedback regime with 1<C<4.6, the SMI system might enter unstable region and the existing SMI model is invalid. In this case, the SMI signals exhibit some novel features and contain higher-frequency components. To detect an SMI signal without distortion or take suitable correction on the SMI signal, it is must to make an analysis on the system bandwidth and its influence on SMI signals. The results in this paper provide useful guidance for developing an SMI sensing system.

Paper Details

Date Published: 6 November 2018
PDF: 6 pages
Proc. SPIE 10812, Semiconductor Lasers and Applications VIII, 1081210 (6 November 2018); doi: 10.1117/12.2500737
Show Author Affiliations
Bin Liu, Univ. of Wollongong (Australia)
Yuxi Ruan, Univ. of Wollongong (Australia)
Lingzhi Cao, Zhengzhou Univ. of Light Industry (China)
Yanguang Yu, Univ. of Wollongong (Australia)
Jiangtao Xi, Univ. of Wollongong (Australia)
Qinghua Guo, Univ. of Wollongong (Australia)
Jun Tong, Univ. of Wollongong (Australia)


Published in SPIE Proceedings Vol. 10812:
Semiconductor Lasers and Applications VIII
Ning Hua Zhu; Werner H. Hofmann, Editor(s)

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