Femtosecond filamentation induced fluorescence technique for atmospheric sensing<xref ref-type="fn" rid="cpb141408fn1">*</xref>

Femtosecond filamentation induced fluorescence technique for atmospheric sensing*

Yuan Shuai^a),^b),^c), Chin See Leang^c), Zeng He-Ping^a),^b),^†

Fig.#cod#x00A0;4. a Typical spectra in the range of 333#cod#x2013;339#cod#x00A0;nm for filament-induced fluorescence of NH in air. b Relative humidity in air as a function of the NH fluorescence signal at 336#cod#x00A0;nm at water temperature of 21#cod#x00A0;#cod#x00B0;C. The relative humidity was varied by changing the temperature of the water and was measured by a hydrometer.