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Updated: Jan 9, 2026

Low-cost Custom Fabrication and Mode-locked Operation of an All-normal-dispersion Femtosecond Fiber Laser for Multiphoton Microscopy
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Ultrashort pulse generation by semiconductor mode-locked lasers at 760 nm.

Huolei Wang, Liang Kong, Adam Forrest

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    |November 18, 2014
    PubMed
    Summary

    Researchers developed novel semiconductor mode-locked lasers for ultrashort pulse generation near 760 nm. These lasers offer potential for advanced biomedical imaging and optical communications.

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    Area of Science:

    • Optoelectronics
    • Semiconductor Lasers

    Background:

    • Ultrashort pulse generation is crucial for advanced applications.
    • Semiconductor lasers offer compact and efficient solutions.

    Purpose of the Study:

    • To demonstrate the first semiconductor mode-locked lasers operating at the 760 nm waveband.
    • To investigate the impact of operational parameters on laser performance.

    Main Methods:

    • Utilized multi-section AlGaAs multi-quantum-well laser diodes.
    • Employed passive mode-locking techniques.
    • Investigated bias conditions and front facet reflectivity.

    Main Results:

    • Achieved ultrashort pulse generation around 766 nm with durations down to ~4 ps.
    • Observed pulse repetition rates of 19.4 GHz and 23.2 GHz.
    • Identified key roles of bias conditions and facet reflectivity in mode-locking stability.

    Conclusions:

    • Successfully demonstrated semiconductor mode-locked lasers for the 760 nm waveband.
    • These lasers are promising for multi-photon biomedical imaging and frequency conversion applications.