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Related Experiment Video

Updated: Dec 21, 2025

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry
12:14

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Optical lock-in camera for gravitational wave detectors.

Huy Tuong Cao, Daniel D Brown, Peter J Veitch

    Optics Express
    |May 15, 2020
    PubMed
    Summary

    A new optical lock-in camera uses a Pockels cell to achieve high-resolution imaging of optical beats. This advancement enhances precision for applications like gravitational wave detection.

    Area of Science:

    • Optics and Photonics
    • Gravitational Wave Detection

    Background:

    • Precise knowledge of spectral component intensity and phase is vital for high-precision optical applications.
    • Interferometric gravitational wave detectors utilize optical beats for experimental control.

    Purpose of the Study:

    • To introduce and demonstrate an optical lock-in camera for recording optical beats.
    • To achieve higher spatial and temporal resolution in optical beat measurements.

    Main Methods:

    • Development of an optical lock-in camera employing a Pockels cell as a fast optical switch.
    • Integration of the Pockels cell with a sCMOS array to create pixel-level optical lock-in amplifiers.

    Main Results:

    • The camera successfully records optical beats at MHz frequencies and above.

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  • Demonstrated capability to record fields with 2 Mpx resolution at 10 Hz.
  • Achieved a sensitivity of -62 dBc when averaged over 2 seconds.

    • Conclusions:

    • The optical lock-in camera offers superior spatial and temporal resolution compared to previous methods.
    • This technology significantly advances the capabilities for precise optical measurements in demanding applications.