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Related Concept Videos

Deflection of a Beam01:19

Deflection of a Beam

571
Accurately determining beam deflection and slope under various loading conditions in structural engineering is crucial for ensuring safety and structural integrity. Singularity functions offer a streamlined approach to analyzing beams, especially when multiple loading functions complicate the bending moment equation.
Singularity functions, described in an earlier lesson, are powerful mathematical tools that represent discontinuities within a function commonly encountered in structural loading...
571

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Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station
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Fast beam steering with an optical phased array.

David R Gozzard, Lyle E Roberts, James T Spollard

    Optics Letters
    |July 8, 2020
    PubMed
    Summary
    This summary is machine-generated.

    Optical phased arrays (OPAs) steer laser beams without moving parts. This study introduces a phase-locked OPA control system achieving 1 MHz steering speeds and high stability for advanced applications.

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    Area of Science:

    • Photonics and laser technology
    • Optical engineering
    • Control systems

    Background:

    • Optical phased arrays (OPAs) enable beam steering without mechanical components.
    • OPAs have diverse applications in laser communications, target acquisition, metrology, and directed energy.
    • Existing OPA systems face limitations in steering speed and scalability.

    Purpose of the Study:

    • To present a novel control architecture for an actively phase-locked OPA.
    • To demonstrate high-speed beam steering capabilities.
    • To assess the scalability and compatibility of the control system with high-power arrays.

    Main Methods:

    • Development of a digital control architecture for an OPA.
    • Implementation of active phase-locking mechanisms.
    • Utilizing electro-optic modulators for beam steering actuation.

    Main Results:

    • Achieved output phase stability of λ/770.
    • Demonstrated laser beam steering speeds up to 1 MHz.
    • The digital control architecture is scalable to hundreds of emitters and compatible with high-power arrays.

    Conclusions:

    • The developed control architecture enables high-speed, stable laser beam steering with OPAs.
    • The system's scalability and compatibility pave the way for advanced OPA applications.
    • Future extensions of the digital control architecture could reach GHz steering speeds.