Application of fiber specklegram sensor to fine angular alignment

Shizhuo Yin, Purwadi Purwosumarto, Francis T.S. Yu

    Research output: Contribution to journalArticlepeer-review

    23 Scopus citations


    Experimentation of fiber specklegram sensor (FSS) as applied to fine angular alignment is presented. The objective is to exploit the spatial information contents (i.e., fiber speckle field) for sensing. The results shown that FSS is highly sensitive to fiber perturbation. As applied to fine angular alignment, two sensing fibers are tightly glued on a plastic rod. By bending the plastic rod, high angular measurement with bending direction can be obtained. The sensitivity measurement is shown to be as high as 0.02°, using a 0.3 numerical aperture (NA) silicate fiber. The sensitivity can be further improved if one uses higher NA fibers.

    Original languageEnglish (US)
    Pages (from-to)15-21
    Number of pages7
    JournalOptics Communications
    Issue number1
    StatePublished - Oct 15 1999

    All Science Journal Classification (ASJC) codes

    • Electronic, Optical and Magnetic Materials
    • Atomic and Molecular Physics, and Optics
    • Physical and Theoretical Chemistry
    • Electrical and Electronic Engineering


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