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High-power multiple-frequency narrow-linewidth laser source based on a semiconductor tapered amplifier.

G Ferrari, M O Mewes, F Schreck

    Optics Letters
    |December 12, 2007
    PubMed
    Summary

    This study presents a master oscillator-power amplifier (MOPA) laser system generating 210 mW of power at 671 nm. The flexible configuration produces multiple narrow-linewidth frequency components, ideal for various applications.

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    Area of Science:

    • Optics and Photonics
    • Laser Physics
    • Semiconductor Lasers

    Background:

    • External-cavity diode lasers offer narrow linewidths but limited power.
    • Master oscillator-power amplifier (MOPA) configurations combine the benefits of master oscillators and power amplifiers.

    Purpose of the Study:

    • To develop a high-power continuous-wave (cw) laser source with multiple narrow-linewidth frequency components.
    • To investigate the performance of a MOPA configuration using grating-stabilized external-cavity diode lasers.

    Main Methods:

    • Injected light from two grating-stabilized external-cavity diode lasers into a semiconductor tapered amplifier.
    • Utilized a MOPA configuration to amplify the laser output.
    • Varied the frequency difference (delta) between the two laser components from 20 MHz to 12 GHz.

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  • Adjusted the power ratio between the two frequency components.

    • Main Results:

    • Achieved 210 mW of output power at 671 nm in a diffraction-limited mode.
    • Produced two frequency components with narrow linewidths.
    • Observed the appearance of additional frequency sidebands for delta < 2 GHz.
    • Demonstrated a freely adjustable power ratio between the two frequency components.

    Conclusions:

    • The developed MOPA configuration is a flexible and simple high-power cw laser source.
    • This laser system is suitable for applications requiring multiple narrow-linewidth frequency components.
    • The system offers precise control over frequency difference and power ratios.