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Related Experiment Video

Updated: Jun 23, 2026

Low-cost Custom Fabrication and Mode-locked Operation of an All-normal-dispersion Femtosecond Fiber Laser for Multiphoton Microscopy
08:48

Low-cost Custom Fabrication and Mode-locked Operation of an All-normal-dispersion Femtosecond Fiber Laser for Multiphoton Microscopy

Published on: November 22, 2019

Single-longitudinal-mode tunable WDM-channel-selectable fiber laser.

Nathaniel Libatique, Li Wang, Ravi Jain

    Optics Express
    |May 23, 2009
    PubMed
    Summary

    We demonstrate a tunable fiber laser for wavelength-division multiplexing (WDM) channels. This laser achieves single-frequency emission and WDM channel selection without external locking, offering high side mode suppression.

    Area of Science:

    • Photonics and Optical Engineering
    • Fiber Laser Technology
    • Wavelength-Division Multiplexing (WDM) Systems

    Background:

    • Fiber lasers are crucial for optical communications.
    • Achieving single-longitudinal-mode operation and wavelength tunability in fiber lasers is challenging.
    • Wavelength-division multiplexing (WDM) requires stable, selectable laser sources.

    Purpose of the Study:

    • To report the operation of a novel single-longitudinal-mode, WDM channel-selectable fiber laser.
    • To demonstrate discrete tunability across WDM channels without external wavelength locking.
    • To achieve high performance in terms of side mode suppression and output power.

    Main Methods:

    • Utilized a tunable fiber Bragg grating for wavelength selection.

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    Last Updated: Jun 23, 2026

    Low-cost Custom Fabrication and Mode-locked Operation of an All-normal-dispersion Femtosecond Fiber Laser for Multiphoton Microscopy
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    Published on: November 22, 2019

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  • Incorporated a saturable absorption filter for linewidth narrowing.
  • Employed an intracavity etalon to ensure single-frequency emission.
  • Integrated these components to enable channel-selectable WDM operation.

    • Main Results:

    • Achieved single-longitudinal-mode operation.
    • Demonstrated discretely tunable WDM channel operation.
    • Obtained side mode suppression ratios (SMSRs) greater than 50 dB.
    • Delivered approximately 3 dBm output power per channel for 8 channels with a 50 GHz spacing.

    Conclusions:

    • The developed fiber laser architecture enables efficient and tunable WDM channel selection.
    • The absence of external locking modules simplifies the system design.
    • The demonstrated performance metrics are suitable for WDM applications.