Self-mixing interferometry and its applications

Yanguang Yu, Yuanlong Fan, Bin Liu

    Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


    This paper reviews the self-mixing interference (SMI) in terms of its operation principle, the features of SMI signals and its configuration. SMI refers to a phenomenon that occurs when a small fraction of the light emitted by a laser is backscattered or reflected by an external target and re-enters the laser active cavity, thus leading to the modulation of the laser output power. This is a remarkably universal phenomenon, occurring in lasers regardless of type. A few application examples are presented based on the research work done in our group, including SMI sensing for displacement measurement, material parameters and laser parameters. An SMI with the laser operating at the relaxation oscillation is introduced which has potential for achieving more sensitive sensing.
    Original languageEnglish
    Title of host publicationProceedings of SPIE - Optical Design and Testing VII
    Subtitle of host publicationSPIE/COS Photonics ASIA | 12-14 October 2016, Beijing, China
    EditorsYongtian Wang, Tina E. Kidger, Kimio Tatsuno
    Place of PublicationWashington, USA
    ISBN (Electronic)978-1510604629
    ISBN (Print)978-1510604612
    Publication statusPublished - Oct 2016
    EventSPIE/COS Photonics Asia: Optical Design and Testing VII - Beijing, China
    Duration: 31 Oct 2016 → …

    Publication series

    NameProceedings of SPIE
    ISSN (Print)0277-786X
    ISSN (Electronic)1996-756X


    ConferenceSPIE/COS Photonics Asia
    Period31/10/16 → …
    Internet address


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