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Updated: Jul 1, 2025

Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements
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Polarization calibration source for the Polstar spectropolarimeter.

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    Summary
    This summary is machine-generated.

    A novel polarization calibration source (PCS) was designed for the Polstar mission. This source generates highly polarized light for pre-launch calibration across multiple parameters down to 110 nm.

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    Area of Science:

    • Optics and Photonics
    • Astrophysical Instrumentation

    Background:

    • Accurate calibration is crucial for astrophysical instruments like Polstar.
    • Existing calibration sources may not meet the stringent requirements for polarization, photometry, and spectral measurements.

    Purpose of the Study:

    • To describe the material and configuration trades for designing a specialized polarization calibration source (PCS).
    • To ensure the PCS can generate a highly polarized imaged beam matching Polstar's f/#.
    • To enable comprehensive pre-launch calibration of Polstar.

    Main Methods:

    • Investigated various material options for optimal performance at short wavelengths.
    • Analyzed different optical configurations to achieve high polarization and desired beam characteristics.
    • Focused on design approaches enabling light generation down to 110 nm.

    Main Results:

    • Identified specific material and configuration trades for the PCS design.
    • The PCS design allows for the generation of highly polarized light.
    • The capability extends to wavelengths as low as 110 nm.

    Conclusions:

    • The developed PCS design meets the requirements for Polstar's pre-launch calibration.
    • The PCS will facilitate precise polarimetric, photometric, and spectral calibration.
    • This specialized source enhances the reliability and accuracy of the Polstar mission data.