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Optical parametric generation in orientation-patterned gallium phosphide.

Hanyu Ye, S Chaitanya Kumar, Junxiong Wei

    Optics Letters
    |September 16, 2017
    PubMed
    Summary

    We developed a new optical parametric generator using orientation-patterned gallium phosphide (OP-GaP) nonlinear material. This device achieves tunable output in the visible and infrared spectrum with stable performance.

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    Area of Science:

    • Nonlinear optics
    • Materials science

    Background:

    • Optical parametric generators (OPGs) are crucial for tunable light sources.
    • Development of new nonlinear optical materials is essential for advancing OPG technology.

    Purpose of the Study:

    • To demonstrate an OPG utilizing the novel nonlinear material, orientation-patterned gallium phosphide (OP-GaP).
    • To characterize the performance and stability of the OP-GaP based OPG.

    Main Methods:

    • Utilized a Q-switched nanosecond Nd:YAG laser for pumping.
    • Employed a 40-mm-long OP-GaP crystal in a single-pass configuration.
    • Tuned the OPG output across specific wavelength ranges and measured power and stability.

    Main Results:

    • Achieved tunable output from 1721-1850 nm (signal) and 2504-2787 nm (idler).
    • Generated up to ~18 mW total average output power, including ~5 mW idler power.
    • Demonstrated passive power stability better than 0.87% rms over 1 hour.

    Conclusions:

    • OP-GaP is a promising material for optical parametric generation.
    • The developed OPG shows tunable output and good stability for various applications.
    • First-time temperature-dependent loss measurements for OP-GaP were reported.