This Small Business Innovative Research Phase I proposal seeks to develop a compact, autonomous NO2 sensor for air monitoring applications based on laser induced fluorescence (LIF). A key component in the proposed system is new laser technology developed at NovaWave. The Phase I research will directly demonstrate the utility of this new light source by performing LIF measurements on NO2 samples in a laboratory setting. The Phase II system will fully integrate the laser with an autonomous spectrometer and air sampling system to comprise a complete sensor package. Phase III will result in the development of fieldable commercial systems that will be manufactured and distributed to the regional end users.