Ultrafast gain dynamics in N2+ lasing from highly excited vibrational states pumped by circularly polarized femtosecond laser pulses

Kaixuan Zhai; Ziting Li; Hongqiang Xie; Chenrui Jing; Guihua Li; Bin Zeng; Wei Chu; Jielei Ni; Jinping Yao; Ya Cheng

doi:10.3788/COL201513.050201

Journals >Chinese Optics Letters >Volume 13 >Issue 5 >Page 050201 > Article

Chinese Optics Letters
Vol. 13, Issue 5, 050201 (2015)

N_{2}^{+}

lasing from highly excited vibrational states pumped by circularly polarized femtosecond laser pulses

Kaixuan Zhai^1、2, Ziting Li^1、2、3, Hongqiang Xie^1、2, Chenrui Jing^1、2, Guihua Li¹, Bin Zeng¹, Wei Chu¹, Jielei Ni¹, Jinping Yao^1、*, and Ya Cheng¹

Author Affiliations

¹State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China

²University of Chinese Academy of Sciences, Beijing 100049, China

³School of Physics Science and Engineering, Tongji University, Shanghai 200092, China

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DOI: 10.3788/COL201513.050201 Cite this Article Set citation alerts

Kaixuan Zhai, Ziting Li, Hongqiang Xie, Chenrui Jing, Guihua Li, Bin Zeng, Wei Chu, Jielei Ni, Jinping Yao, Ya Cheng. Ultrafast gain dynamics in

N_{2}^{+}

lasing from highly excited vibrational states pumped by circularly polarized femtosecond laser pulses[J]. Chinese Optics Letters, 2015, 13(5): 050201 Copy Citation Text

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Forward spectra recorded at the gas pressures of (a) 22, (b) 100, and (c) 260 mbar in a pump–probe scheme. (d) Energy level diagram of the ionized and neutral nitrogen molecules in which the B2Σu+(v′=5,4,3)→X2Σg+(v=4,3,2) transitions are indicated with the corresponding lasing wavelengths.

Fig. 1. Forward spectra recorded at the gas pressures of (a) 22, (b) 100, and (c) 260 mbar in a pump–probe scheme. (d) Energy level diagram of the ionized and neutral nitrogen molecules in which the B2Σu+(v′=5,4,3)→X2Σg+(v=4,3,2) transitions are indicated with the corresponding lasing wavelengths.

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Forward spectra captured at the different wavelengths of the seed pulses. The central wavelengths of the seed pulses are indicated on the side of the corresponding spectra.

Fig. 2. Forward spectra captured at the different wavelengths of the seed pulses. The central wavelengths of the seed pulses are indicated on the side of the corresponding spectra.

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Fig. 3. The temporal evolution of the N2+ laser at the wavelengths of (a) 353.3, (b) 353.8, and (c) 354.9 nm with the time delay between the pump and probe pulses at a gas pressure of 22 mbar.

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Fig. 4. The temporal evolution of the N2+ laser at the wavelengths of (a) 353.3 and (b) 353.8 nm with the time delay between the pump and probe pulses at gas pressures of 22, 100, and 260 mbar.

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