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;6. Typical spectra in the ranges of 356#cod#x2013;360#cod#x00A0;nm a and 384#cod#x2013;390#cod#x00A0;nm b for the fluorescence of CN in a continuous CO 2 stream. The black curves were taken when the two infrared filaments were temporally overlapped, while the red curves were measured when there was a #cod#x223C;2#cod#x00A0;ns time delay between the two infrared filaments.