Measurements of the complex transmission/reflection coefficient of a material using mixed-type common-path heterodyne interferometery

J. J. Chieh, S. Y. Yang, Herng Er Horng, Chin Yih Hong, H. C. Yang

    Research output: Contribution to journalArticlepeer-review

    2 Citations (Scopus)

    Abstract

    The dielectric constant, magnetic permeability, and refractive index are the fundamental optical parameters of a material. To investigate these optical parameters, a mixed-type common-path heterodyne interferometer is developed in this paper. By using this interferometer to detect the amplitudes and phases of both the transmission and reflection coefficients, the complex dielectric constant, magnetic permeability, and refractive index can be obtained using the algorithm discussed here. The validity of the mixed-type common-path heterodyne interferometer is demonstrated for visible lights, such as red, green, and blue, using lasers as light sources. Furthermore, the specifications for characterizing the optical properties of samples using the mixed-type common-path heterodyne interferometer are investigated. For example, dielectric constant ε, magnetic permeability μ, and the refractive index n of 2.161 + i0.002 0.9997 - i0.0009, and 1.4699 - i3.4 × 10-7 with low uncertainties of 0.003 + i0.002, 0.0003 + i0.0009, and 0.0007 + i8 × 10-8, respectively, for a fused quartz measuring 632.8 nm are investigated. It also demonstrated that, in the case of the investigation in visible ranges, the measurement procedure is performed by only the common-path transmission type heterodyne interferometer.

    Original languageEnglish
    Pages (from-to)1878-1885
    Number of pages8
    JournalIEEE Transactions on Instrumentation and Measurement
    Volume58
    Issue number6
    DOIs
    Publication statusPublished - 2009 Jan 1

    Keywords

    • Common path
    • Complex reflection coefficient
    • Complex transmission coefficient
    • Heterodyne interferometer
    • Optical characterization

    ASJC Scopus subject areas

    • Instrumentation
    • Electrical and Electronic Engineering

    Fingerprint Dive into the research topics of 'Measurements of the complex transmission/reflection coefficient of a material using mixed-type common-path heterodyne interferometery'. Together they form a unique fingerprint.

    Cite this