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Simple all-microstructured-optical-fiber interferometer built via fusion splicing.

Joel Villatoro, Vladimir P Minkovich, Valerio Pruneri

    Optics Express
    |June 18, 2009
    PubMed
    Summary

    We developed a compact all-microstructured-optical-fiber interferometer using fusion splices. This device exhibits a sinusoidal interference pattern, showing potential for sensing applications.

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    Area of Science:

    • Optics and Photonics
    • Fiber Optics
    • Interferometry

    Background:

    • Microstructured optical fibers (MOFs) offer unique light manipulation properties.
    • Interferometers are crucial for precise measurements and sensing.
    • Developing compact and stable interferometric devices is an ongoing challenge.

    Purpose of the Study:

    • To create a compact and stable all-microstructured-optical-fiber interferometer.
    • To investigate the interference characteristics of the proposed device.
    • To demonstrate its potential for sensing applications.

    Main Methods:

    • Fabrication of an all-microstructured-optical-fiber interferometer using two fusion splices.
    • Intentional collapsing of air-holes near splices to broaden optical modes.

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  • Coupling of two modes in the spliced section.
  • Optical spectral analysis across a broad wavelength range (800-1600 nm).

    • Main Results:

    • Achieved a truly sinusoidal interference pattern with high fringe visibility (up to 80%).
    • Observed interference across a wide spectral range (800-1600 nm).
    • Demonstrated inverse proportionality between fringe spacing and splice distance.

    Conclusions:

    • The developed all-microstructured-optical-fiber interferometer is compact and stable.
    • The device exhibits excellent sinusoidal interference properties.
    • The interferometer shows significant potential for various sensing applications.