In some embodiments, the present invention provides an apparatus and process that includes control electronics that generate an electronic control signal; and a plurality of optically or electrically pumped semiconductor lasers, quantum-cascade lasers, optical parametric generators, or optical parametric oscillators, operatively coupled to the control electronics, that output an optical signal having a plurality of wavelengths, each wavelength having an output intensity that is varied over time to simulate a combustion signature of a weapon. In some embodiments, at least two different infrared wavelengths are varied differently with time. Some embodiment are implemented as part of, for example, a anti-aircraft defense system, wherein incoming aircraft need to be disabled, and the present invention provides a way of distracting, exhausting, confusing, overwhelming, or bypassing the hostile aircraft's anti-missile defenses so that, e.g., a naval vessel's anti-aircraft defensive missiles can be launched effectively to shoot down or disable the hostile aircraft.