High Power Laser Science and Engineering, Volume. 4, Issue 1, 010000e7(2016)
Nitrogen fluorescence induced by the femtosecond intense laser pulses in air
Fig. 1. Schematic of experimental setup to measure the plasma fluorescence generated during the femtosecond filamentation in air. G: Glan prism; H: half-wave plate; L: focusing lens; R: rectangular diaphragm; F: optical fibre.
Fig. 2. (a) Change of fluorescence spectra with the propagation distance
Fig. 3. Change of 337, 357, and 380 nm spectral lines with
Fig. 4. (a) Variation of the spectrum intensity around 337 nm (332–341 nm) with
Fig. 5. Variation of collapse distance when focal length is (a) 100 and (b) 40 cm. The red circles are the experimental values, and the blue squares and green triangles refer to the collapse distance calculated from Marburger’s law (Equation (
Fig. 6. (a) Variation of the spectrum intensity around 337 nm signal (332–341 nm) with
Fig. 7. Normalized spectrum intensity (a) at 35, 60, and 90 mm as the focal length
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He Li, Suyu Li, Shuchang Li, Dunli Liu, Dan Tian, Anmin Chen, Ying Wang, Xiaowei Wang, Yunfeng Zhang, Mingxing Jin. Nitrogen fluorescence induced by the femtosecond intense laser pulses in air[J]. High Power Laser Science and Engineering, 2016, 4(1): 010000e7
Received: Sep. 4, 2015
Accepted: Jan. 18, 2016
Published Online: Oct. 25, 2016
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