Aviation is exceptionally vulnerable to man-portable missile attacks (MANPADS), particularly during the critical stages of flight, e.g., take-off and landing. Consequently, aircraft require a further means of self-protection in addition to pyrotechnic flares. Laser Directed Infrared Countermeasures (DIRCM) target the infrared guidance system present in the majority of all MANPADS, resulting in sensor dazzle and possible damage-a soft kill approach. Unfortunately, current DIRCM systems, albeit highly effective against first and second-generation seekers, are less against imaging ones (third and fourth-generation). Our paper investigates a means to increase the effectiveness of dazzle by modulating the laser at a rate close to the frame rate of the imaging sensor, i.e., a strobing effect. A continuous-wave quantum cascade laser (QCL) at 4.6 microns illuminated a mid-infrared focal plane array imager, modulated by either an optical chopper or by periodically varying the current of the QCL. The laser beam and a representative target were combined optically using plano and off-axis parabolic mirrors, resulting in the imager viewing a dazzled scene at infinity. In summary, we demonstrate experimentally that the intermittency of the laser dazzle could improve the effectiveness of a DIRCM system.


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    Titel :

    The effectiveness of amplitude modulation on the laser dazzling of a mid-infrared imager


    Beteiligte:
    Lewis, Gareth D. (Autor:in) / Struyve, Robbie (Autor:in) / Boeckx, Cedric (Autor:in) / Vandewal, Marijke (Autor:in)

    Kongress:

    High-Power Lasers and Technologies for Optical Countermeasures ; 2022 ; Berlin,Germany


    Erschienen in:

    Proc. SPIE ; 12273


    Erscheinungsdatum :

    2022-11-02





    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



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