Abstract: A remote sensing system includes a transmitter for generating multiple beams of light; a combiner for combining the multiple beams of light and directing the combined multiple beams toward a target of multiple gases; and a receiver for receiving the combined multiple beams of light from the target. The first and second transmitted beams of light include, respectively, first and second sets of multiple distinct wavelengths that are simultaneously transmitted toward the target. The receiver receives the multiple distinct wavelengths, and simultaneously detects an intensity of each received wavelength. The first set of multiple distinct wavelengths is selected based on absorption characteristics of a first species of gas, and the second set of multiple distinct wavelengths is selected based on absorption characteristics of a second species of gas. The transmitter includes first and second mode-locked based lasers for generating, respectively, the first and second sets of distinct multiple wavelengths.

Abstract: An apparatus for laser interrogation of surface agents moving relative to the apparatus. A receiver telescope includes a secondary reflector that may compensate for variations in distance from a target to the laser. The secondary reflector relies on a distance to target signal that may be collected at a point substantially away from the target, in the direction of relative motion, to allow a focusing mechanism time to react.