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Multi-structured-beam optical parametric oscillator.

Varun Sharma, S Chaitanya Kumar, G K Samanta

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

    This study demonstrates a single optical parametric oscillator (OPO) device capable of generating multiple structured laser beams, including vortex and Airy beams, with tunable wavelengths. This versatile design overcomes previous limitations requiring different architectures for each beam type.

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    Area of Science:

    • Optics and Photonics
    • Laser Physics
    • Nonlinear Optics

    Background:

    • Structured laser beams are crucial for various applications but conventionally require complex setups.
    • Optical Parametric Oscillators (OPOs) offer a path to generating tunable structured beams.
    • Existing OPO designs are limited, often producing only one type of structured beam or requiring specific configurations.

    Purpose of the Study:

    • To develop a single OPO device capable of generating multiple types of structured laser beams.
    • To demonstrate the generation of vortex, Airy, and vortex Airy beams from a single system.
    • To achieve tunable wavelength generation for these structured beams.

    Main Methods:

    • Utilized an ultrafast, singly-resonant optical parametric oscillator (OPO) pumped by a vortex beam.
    • Employed an intracavity aperture to control the mode structure of the resonant beam.
    • Investigated the generation of different spatial structured beams by adjusting the OPO configuration.

    Main Results:

    • Successfully generated tunable vortex, Airy, vortex Airy, and Gaussian signal beams (1457-1680 nm) from a single OPO.
    • Simultaneously produced a vortex idler beam (2902-3945 nm).
    • Achieved output powers exceeding 1 W for vortex beams and 200 mW for Airy and vortex Airy beams.

    Conclusions:

    • A single OPO device can generate multiple structured laser beams with broad tunability.
    • The demonstrated generic design offers a versatile platform for producing various spatial beams.
    • This approach is adaptable to different spectral regions and timescales, from continuous-wave to ultrafast.