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Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements
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Published on: February 28, 2016

Electrically pumped mode-locked vertical-cavity semiconductor lasers.

W Jiang, M Shimizu, R P Mirin

    Optics Letters
    |October 16, 2009
    PubMed
    Summary

    We report the first electrically pumped mode-locked vertical-cavity surface-emitting laser. This laser operates with a low threshold current and produces 80 ps pulses at a 1 GHz repetition rate.

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    Area of Science:

    • Optoelectronics
    • Laser Physics
    • Semiconductor Devices

    Background:

    • Vertical-cavity surface-emitting lasers (VCSELs) are crucial components in optical communication and sensing.
    • Mode-locking is a technique used to generate ultrashort laser pulses.
    • Achieving electrical pumping for mode-locked VCSELs presents significant challenges.

    Purpose of the Study:

    • To demonstrate the first electrically pumped mode-locked vertical-cavity surface-emitting laser.
    • To characterize the lasing performance of this novel device.

    Main Methods:

    • Fabrication of a vertical-cavity surface-emitting laser structure.
    • Implementation of an electrical pumping scheme.
    • Characterization of lasing threshold, output pulse width, and repetition rate.

    Main Results:

    • Successful demonstration of an electrically pumped mode-locked VCSEL.
    • Lasing threshold current achieved at 15 mA with a 1% output coupler.
    • Output pulse width measured at 80 picoseconds (ps).
    • Repetition rate of 1 gigahertz (GHz) achieved.

    Conclusions:

    • This work represents a significant advancement in VCSEL technology.
    • Electrically pumped mode-locked VCSELs offer potential for compact and efficient pulsed laser sources.
    • Further research can explore higher repetition rates and shorter pulse durations.