A laser pulse is a brief burst of laser output, unlike continuous-wave emission. Pulsed lasers concentrate energy into very short intervals, so a system can have a low average power but a very high peak power during each pulse. Pulse width, repetition rate, and peak intensity are key properties that determine how the laser behaves.
In cyber security, laser pulses matter because they can affect hardware and sensors. Attackers may use short, intense pulses for fault injection, sensor blinding, or optical probing of cameras, biometric readers, and other exposed electronics. Defenders care about pulses because they can trigger damage, false readings, or unexpected state changes. Monitoring for optical exposure, adding shielding and filters, and validating sensor behavior under strong light are common mitigations.