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Related Concept Videos

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There are two main infrared (IR) spectrophotometers: dispersive IR spectrometers and Fourier transform infrared (FTIR) spectrometers. In a dispersive IR spectrometer, a beam of infrared radiation produced by a hot wire is divided into two parallel equal-intensity beams using mirrors. One beam passes through the sample, while another is a reference beam. The beams then move through the monochromator, which separates the radiations into a continuous spectrum of different frequencies. The...
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Related Experiment Video

Updated: Jun 23, 2026

Implementation of a Reference Interferometer for Nanodetection
16:11

Implementation of a Reference Interferometer for Nanodetection

Published on: April 26, 2014

Kilometric optical fiber interferometer.

L Delage, F Reynaud

    Optics Express
    |May 8, 2009
    PubMed
    Summary
    This summary is machine-generated.

    This study demonstrates a fiber optic interferometer with 93% fringe contrast using polarization control. Broadband tests revealed dispersion effects from fiber inhomogeneities, partially compensated by adding fiber segments.

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    Last Updated: Jun 23, 2026

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    The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry

    Published on: August 12, 2013

    Area of Science:

    • Optics and Photonics
    • Fiber Optic Sensing

    Background:

    • Interferometers are crucial for precise measurements.
    • Fiber optic interferometers offer remote sensing capabilities.
    • Maintaining polarization state in long fibers is challenging.

    Purpose of the Study:

    • To experimentally investigate a fiber optic interferometer.
    • To assess fringe contrast with polarization control.
    • To study dispersion effects in broadband operation.

    Main Methods:

    • Constructed a fiber optic interferometer with two 500m polarization-maintaining fiber arms.
    • Controlled the polarization state along the fiber arms.
    • Used a 1290nm laser source and broadband spectrum.
    • Introduced additional fiber pieces for compensation.

    Main Results:

    • Achieved fringe contrast up to 93% with polarization control.
    • Observed dispersion differential effects due to fiber inhomogeneities with broadband light.
    • Demonstrated partial compensation of dispersion effects.

    Conclusions:

    • Polarization control is effective for high-contrast fiber optic interferometry.
    • Fiber inhomogeneities introduce dispersion issues in broadband applications.
    • Additional fiber segments can partially mitigate dispersion effects.