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    Researchers developed a fast, switchable multiwavelength optical parametric oscillator using aperiodic optical superlattice technology. This device enables electro-optic control over multiple signal outputs, enhancing power spectral density.

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    Area of Science:

    • Photonics
    • Nonlinear Optics
    • Materials Science

    Background:

    • Optical parametric oscillators (OPOs) are crucial for generating tunable laser light.
    • Existing OPOs often lack fast switching capabilities between multiple wavelengths.
    • Aperiodic optical superlattices offer novel functionalities for integrated photonics.

    Purpose of the Study:

    • To demonstrate the first fast switchable multiwavelength optical parametric oscillator.
    • To integrate electro-optic switching with multiwavelength generation on a single chip.
    • To leverage aperiodic optical superlattice technology for enhanced OPO performance.

    Main Methods:

    • Fabrication of an aperiodically poled lithium niobate (APPLN) device.
    • Integration of the APPLN into a 1064-nm-pumped optical resonator.
    • Application of varying voltages (0 V, 354 V, 805 V) to electro-optically control the device.

    Main Results:

    • Achieved dual signal oscillation at 1540 and 1550 nm.
    • Demonstrated single signal oscillation at 1540 nm and 1550 nm.
    • Exhibited fast and simple electro-optic switching among the three spectral outputs.

    Conclusions:

    • The developed APPLN OPO offers a novel platform for fast, switchable multiwavelength generation.
    • The device integrates EO switching and multiwavelength downconversion functionalities.
    • The EO gain-spectrum filtering mechanism enhances the power spectral density of the switched signals.