1. A system for detecting airborne materials in a 3-dimensional envelope, comprising: a laser diode driver assembly; a modulator assembly operatively coupled to said laser diode driver assembly for conditioning and modulating light emitted by said laser diode driver assembly; a scanning array for directing the modulated light to the 3-dimensional envelope; an optical observation device for collecting backscatter radiation signals from the 3-dimensional envelope; a detection array for receiving the collected backscatter radiation signals; and a signal analysis subsystem for analyzing the backscatter radiation signals using a machine learning algorithm to identify at least one feature of an analyte in the 3-dimensional analyte.