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Related Experiment Video

Updated: Jun 14, 2026

A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings
08:23

A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings

Published on: September 30, 2019

Deviation-free Bragg cell frequency-shifting.

J B Abbiss, W T Mayo

    Applied Optics
    |March 24, 2010
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces a novel method using Bragg cells to apply variable frequency shifts to laser beams without altering beam direction. This technique enhances laser anemometry applications and dynamic range capabilities.

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    Published on: December 22, 2015

    Area of Science:

    • Optics and Photonics
    • Laser Physics
    • Measurement Science

    Background:

    • Laser anemometry relies on frequency shifts for accurate velocity measurements.
    • Bragg cells are commonly used for frequency shifting in optical systems.
    • Existing methods may face limitations in dynamic range or beam direction stability.

    Purpose of the Study:

    • To present a new method for applying variable frequency shifts to laser beams using Bragg cells.
    • To ensure the output diffracted beam direction remains constant regardless of frequency shift magnitude.
    • To explore applications in laser anemometry and methods for dynamic range enhancement.

    Main Methods:

    • Utilizing Bragg cells to impart a variable frequency shift to a laser beam.
    • Maintaining a constant output diffracted beam direction irrespective of the applied frequency shift.
    • Investigating the application of this method in reference-beam and Doppler-difference laser anemometry.

    Main Results:

    • Demonstrated a technique where frequency shift magnitude does not affect the output beam direction.
    • Successfully applied the method to enhance laser anemometry systems.
    • Identified strategies for achieving increased dynamic range in measurements.

    Conclusions:

    • The described Bragg cell method offers stable beam direction during frequency shifting.
    • This technique provides a valuable advancement for laser anemometry.
    • Further potential exists for optimizing dynamic range in optical measurement systems.