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Updated: Jun 19, 2026

Writing Bragg Gratings in Multicore Fibers
08:48

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Published on: April 20, 2016

Grating evolution in frequency-doubling fibers.

M M Lacerda, I C Carvalho, W Margulis

    Optics Letters
    |October 22, 2009
    PubMed
    Summary
    This summary is machine-generated.

    The study tracked chi((2)) gratings in frequency-doubling fibers. During preparation, grating position shifts, and upon saturation, it moves back and narrows, impacting efficiency.

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    Area of Science:

    • Nonlinear optics
    • Fiber optics
    • Materials science

    Background:

    • Frequency-doubling fibers are crucial for generating visible light from infrared lasers.
    • Understanding the dynamics of chi((2)) gratings is essential for optimizing their performance.

    Purpose of the Study:

    • To investigate the evolution of the chi((2)) grating's position and width during the fabrication of frequency-doubling fibers.
    • To correlate these grating characteristics with the conversion efficiency.

    Main Methods:

    • In-situ monitoring of the chi((2)) grating's spatial profile within the fiber.
    • Tracking the grating's peak position and width throughout the preparation process.
    • Measuring the second-harmonic generation (SHG) conversion efficiency.

    Main Results:

    • The grating peak initially migrates from the fiber input to the output end.
    • This migration precedes the saturation of the conversion efficiency.
    • Post-saturation, the grating retracts towards the input end and exhibits a reduced width.

    Conclusions:

    • The dynamic movement and narrowing of the chi((2)) grating are key factors influencing frequency-doubling fiber performance.
    • Optimizing the preparation process to control grating dynamics can enhance conversion efficiency.