TY - JOUR
T1 - Ultrafast gain dynamics in N2+ lasing from highly excited vibrational states pumped by circularly polarized femtosecond laser pulses
AU - Zhai, Kaixuan
AU - Li, Ziting
AU - Xie, Hongqiang
AU - Jing, Chenrui
AU - Li, Guihua
AU - Zeng, Bin
AU - Chu, Wei
AU - Ni, Jielei
AU - Yao, Jinping
AU - Cheng, Ya
N1 - Publisher Copyright:
© 2015 Chinese Optics Letters.
PY - 2015/5/10
Y1 - 2015/5/10
N2 - We experimentally demonstrate N2+ lasing actions at the wavelengths of 353.3, 353.8, and 354.9 nm using a circularly polarized femtosecond laser. The three laser lines correspond to the B2Ʃu+ (v'=5, 4, 3) →X2Ʃg+ (v'=4,3,2) transitions, respectively. Particularly, we reveal the pressure-dependent gain dynamics of these lasing actions from highly excited vibrational states with a pump-Cprobe scheme. Our experimental results confirm that electron collisional excitation plays an important role in the establishment of a population inversion of N2+ lasing at these wavelengths.
AB - We experimentally demonstrate N2+ lasing actions at the wavelengths of 353.3, 353.8, and 354.9 nm using a circularly polarized femtosecond laser. The three laser lines correspond to the B2Ʃu+ (v'=5, 4, 3) →X2Ʃg+ (v'=4,3,2) transitions, respectively. Particularly, we reveal the pressure-dependent gain dynamics of these lasing actions from highly excited vibrational states with a pump-Cprobe scheme. Our experimental results confirm that electron collisional excitation plays an important role in the establishment of a population inversion of N2+ lasing at these wavelengths.
UR - https://www.scopus.com/pages/publications/84937605700
U2 - 10.3788/COL201513.050201
DO - 10.3788/COL201513.050201
M3 - 文章
AN - SCOPUS:84937605700
SN - 1671-7694
VL - 13
JO - Chinese Optics Letters
JF - Chinese Optics Letters
IS - 5
M1 - 050201
ER -