ZHANG Yang, QIAN Jing, LI Peng-fei etc. Upconversion Luminescence of Mn<sup>2+</sup> Doped-germanate Glass Induced by Femtosecond Laser Pulses[J]. Chinese Journal of Luminescence, 2015,36(7): 738-743
ZHANG Yang, QIAN Jing, LI Peng-fei etc. Upconversion Luminescence of Mn<sup>2+</sup> Doped-germanate Glass Induced by Femtosecond Laser Pulses[J]. Chinese Journal of Luminescence, 2015,36(7): 738-743 DOI: 10.3788/fgxb20153607.0738.
Upconversion Luminescence of Mn2+ Doped-germanate Glass Induced by Femtosecond Laser Pulses
doped transparent germanate glass induced by 800 nm femtosecond laser at room temperature was investigated. The excitation and emission spectra show that the excitation process stems from the
6
A(
6
S)
4
E(
4
G)/
4
A
1
(
4
G) transition while the emission originates from the
4
T
1
(
4
G)
6
A
1
(
6
S) transition of Mn
2+
. The emission spectrum excited by 409 nm monochromatic light is similar to that irradiated by 800 nm femtosecond laser. Moreover
by measuring the dependence of the fluorescence intensity on the pump power together with the absorption spectra of both the undoped and doped glass
the conversion of infrared radiation to the visible emission dominated by a two-photon absorption process is confirmed. As Mn
2+
is the only emission center
a significant red-shift with the increasing of Mn
2+
concentration is also observed.
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Keywords
references
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