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Two-mode fiber-optic time-delay scanner for white-light interferometry.

P G Sinha, E Kolltveit, K Bløtekjær

    Optics Letters
    |October 27, 2009
    PubMed
    Summary
    This summary is machine-generated.

    We developed a novel variable-delay interferometer using a two-mode optical fiber. This system uses acousto-optic interaction to scan time delay, enabling new optical measurement capabilities.

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    Area of Science:

    • Photonics and Optical Engineering
    • Interferometry
    • Acousto-Optics

    Background:

    • Time delay scanning is crucial for various optical measurements.
    • Traditional methods often involve bulky or complex setups.
    • A need exists for compact and efficient time delay scanning systems.

    Purpose of the Study:

    • To present a novel scheme for scanning time delay.
    • To introduce a variable-delay interferometer based on a two-mode optical fiber.
    • To demonstrate the feasibility and performance of the proposed system.

    Main Methods:

    • Construction of a variable-delay interferometer using a two-mode optical fiber.
    • Generation of variable optical delay through acousto-optic coupling between fiber modes.
    • Characterization of the interferometer's performance.

    Main Results:

    • Successfully demonstrated a scheme for scanning time delay.
    • The variable delay was effectively generated by acousto-optic interaction.
    • The construction and performance of the system were analyzed and discussed.

    Conclusions:

    • The proposed two-mode optical fiber interferometer offers a viable method for time delay scanning.
    • Acousto-optic interaction provides an effective mechanism for controlling optical delay.
    • This system has potential applications in optical sensing and measurement.