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20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier
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Monolithic Bragg-locked Nd:GdVO4 laser.

Ida Häggström, Björn Jacobsson, Fredrik Laurell

    Optics Express
    |June 24, 2009
    PubMed
    Summary
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    We developed a compact, single-mode laser using Nd:GdVO(4) and a volume Bragg grating. This tunable laser operates at 1066 nm with a narrow bandwidth, ideal for precise wavelength locking.

    Area of Science:

    • Optics and Photonics
    • Laser Physics

    Background:

    • Single-longitudinal-mode lasers are crucial for applications requiring narrow spectral linewidth.
    • Nd:GdVO(4) crystals offer excellent laser properties, including a suitable gain spectrum for 1066 nm operation.
    • Volume Bragg gratings provide a compact and efficient method for wavelength selection and stabilization in lasers.

    Purpose of the Study:

    • To demonstrate a monolithic, single-longitudinal-mode laser utilizing Nd:GdVO(4) and a volume Bragg grating.
    • To characterize the laser's performance, including bandwidth, output power, and tunability.
    • To showcase the potential for compact and versatile laser designs for wavelength locking applications.

    Main Methods:

    • Fabrication of a monolithic laser cavity incorporating a Nd:GdVO(4) gain medium.

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  • Integration of a volume Bragg grating for longitudinal mode selection and wavelength tuning.
  • Characterization of laser output using optical spectrum analyzers and power meters.

    • Main Results:

    • Achieved a single-longitudinal-mode laser output at 1066 nm.
    • Measured a laser bandwidth below 40 MHz at an output power of 30 mW.
    • Demonstrated continuous, mode-hop-free frequency tuning over an 80 GHz range via temperature control.

    Conclusions:

    • The demonstrated laser design is compact, simple, and effective for achieving single-mode operation.
    • The laser's tunability allows for precise wavelength locking anywhere within the gain spectrum.
    • This technology holds promise for various spectroscopic and photonic applications requiring stable, narrow-linewidth lasers.