Standoff Methods for the Detection of Threat Agents: A Review of Several Promising Laser-Based Techniques

<table>STIRAP on sodium vapor. A Stokes delay of 0 corresponds to perfect temporal overlap of the pump and Stokes pulses. Positive delays (pump before Stokes) correspond to SEP; negative delays (Stokes before pump) correspond to STIRAP.</table>

Journal of Spectroscopy

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Figure 8

Figure 8: Standoff Methods for the Detection of Threat Agents: A Review of Several Promising Laser-Based Techniques 