Sub-ppb aerosol detection at a distance of 30 meters by millijoule femtosecond laser pulse filamentation in air

Jiewei Guo, Zhi Zhang, Nan Zhang +8

In this work, sub-ppb aerosol detection is achieved by femtosecond laser filament with a single pulse energy of 4 mJ at a distance of 30 m. A concave mirror with an open aperture o…