In this quarter, we have started the data collection process of the first field deployable multi-wavelength PM measurement system. This system is now operating in real world on PM emissions from a turbine power generator v.s. known PM standard for the system that we designed and tested in the lab. We proved that we could repeatedly collect same scattering signal under same engine load conditions. We further improved the signal to noise ratio of the system, by shortening the exposure time below 1,500 nanosecond and increasing the peak power. Here, we give detailed description on our investigation of the mechanisms in improving precision of pulsed laser timing.