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Hybrid electronically addressable random fiber laser.

Walter Margulis, Avishek Das, J P von der Weid

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    |August 6, 2020
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    Summary
    This summary is machine-generated.

    This study introduces a new random fiber laser design using a semiconductor optical amplifier (SOA) and erbium-doped fiber (EDF). This hybrid system allows for electronically controlled, addressable random lasing by synchronizing pulsed SOA output with back-scattered light.

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    Area of Science:

    • Photonics and Laser Technology
    • Optical Engineering
    • Materials Science

    Background:

    • Random fiber lasers offer unique properties for various applications.
    • Existing architectures often lack precise control over lasing elements.
    • Semiconductor optical amplifiers (SOAs) and erbium-doped fibers (EDFs) are key components in fiber laser systems.

    Purpose of the Study:

    • To develop and characterize a novel random fiber laser architecture.
    • To investigate the use of a hybrid SOA-EDF system for controlled random lasing.
    • To explore the potential for electronically addressable random laser emission.

    Main Methods:

    • A novel architecture combining a semiconductor optical amplifier (SOA) and an erbium-doped fiber (EDF) was designed.
    • The EDF was optically pumped by a continuous wave laser.
    • The SOA, integrated into a fiber loop-mirror, was driven by nanosecond current pulses synchronized with amplified Rayleigh back-scattered light from the EDF.

    Main Results:

    • Laser pulses were generated by synchronizing the SOA driver with back-scattered light from a selected EDF section.
    • Tuning the SOA pulse rate enabled random lasing in meter-long sections of the 81-m open-ended EDF.
    • Laser oscillation was achievable across a modulation frequency range from kHz to MHz.

    Conclusions:

    • A hybrid random laser architecture combining SOA and EDF offers electronically addressable random lasing.
    • The mechanism is linked to phase-sensitive optical time domain reflectometry principles.
    • Potential applications include areas requiring tunable, addressable random light sources.