Enhancement of femtosecond laser-induced plasma fluorescence using a nanosecond laser
(2019) In Optics Express 27(4). p.5755-5763- Abstract
We demonstrate the enhancement of femtosecond (fs) laser-induced filaments in air and nitrogen flow fields using a nanosecond (ns) laser. With the ns laser being imposed on the filaments, the length and the emission intensity of the filaments were largely increased. Temporally resolved spectra of the enhanced filaments were obtained. The results show that the ns laser enhanced the short-lifetime fluorescence of nitrogen, which comes from the transition processes of N
2
... (More)
(Less)
We demonstrate the enhancement of femtosecond (fs) laser-induced filaments in air and nitrogen flow fields using a nanosecond (ns) laser. With the ns laser being imposed on the filaments, the length and the emission intensity of the filaments were largely increased. Temporally resolved spectra of the enhanced filaments were obtained. The results show that the ns laser enhanced the short-lifetime fluorescence of nitrogen, which comes from the transition processes of N
2
+
(B
2
Σ
u
+
- X
2
Σ
g
+
), N
2
(B
3
Π
g
- A
3
Σ
u
+
) and N
2
(C
3
Π
u
- B
3
Π
g
). However, it had little effect on the long-lifetime chemiluminescence, which mainly comes from reactions such as N
2
(A
3
Σ
u
+
) + N
2
(A
3
Σ
u
+
) → N
2
(X
1
Σ
g
+
, v = 0) + N
2
(B
3
Π
g
). A possible explanation of this phenomenon is given, and this phenomenon might have potential applications in instantaneous one-dimensional measurements of various species in gas flow fields.
- author
- Li, Xiaofeng ; Li, Bo LU ; Liu, Jixu ; Zhu, Zhifeng ; Zhang, Dayuan ; Tian, Yifu ; Gao, Qiang LU and Li, Zhongshan LU
- organization
- publishing date
- 2019
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Optics Express
- volume
- 27
- issue
- 4
- pages
- 9 pages
- publisher
- Optical Society of America
- external identifiers
-
- pmid:30876171
- scopus:85062807409
- ISSN
- 1094-4087
- DOI
- 10.1364/OE.27.005755
- language
- English
- LU publication?
- yes
- id
- 353b110b-d62e-4198-997f-7479175f3cc0
- date added to LUP
- 2019-03-19 10:59:07
- date last changed
- 2024-02-14 19:58:59
@article{353b110b-d62e-4198-997f-7479175f3cc0,
abstract = {{<p><br>
We demonstrate the enhancement of femtosecond (fs) laser-induced filaments in air and nitrogen flow fields using a nanosecond (ns) laser. With the ns laser being imposed on the filaments, the length and the emission intensity of the filaments were largely increased. Temporally resolved spectra of the enhanced filaments were obtained. The results show that the ns laser enhanced the short-lifetime fluorescence of nitrogen, which comes from the transition processes of N <br>
<sub>2</sub><br>
<br>
<sup>+</sup><br>
(B <br>
<sup>2</sup><br>
Σ <br>
<sub>u</sub><br>
<br>
<sup>+</sup><br>
- X <br>
<sup>2</sup><br>
Σ <br>
<sub>g</sub><br>
<br>
<sup>+</sup><br>
), N <br>
<sub>2</sub><br>
(B <br>
<sup>3</sup><br>
Π <br>
<sub>g</sub><br>
- A <br>
<sup>3</sup><br>
Σ <br>
<sub>u</sub><br>
<br>
<sup>+</sup><br>
) and N <br>
<sub>2</sub><br>
(C <br>
<sup>3</sup><br>
Π <br>
<sub>u</sub><br>
- B <br>
<sup>3</sup><br>
Π <br>
<sub>g</sub><br>
). However, it had little effect on the long-lifetime chemiluminescence, which mainly comes from reactions such as N <br>
<sub>2</sub><br>
(A <br>
<sup>3</sup><br>
Σ <br>
<sub>u</sub><br>
<br>
<sup>+</sup><br>
) + N <br>
<sub>2</sub><br>
(A <br>
<sup>3</sup><br>
Σ <br>
<sub>u</sub><br>
<br>
<sup>+</sup><br>
) → N <br>
<sub>2</sub><br>
(X <br>
<sup>1</sup><br>
Σ <br>
<sub>g</sub><br>
<br>
<sup>+</sup><br>
, v = 0) + N <br>
<sub>2</sub><br>
(B <br>
<sup>3</sup><br>
Π <br>
<sub>g</sub><br>
). A possible explanation of this phenomenon is given, and this phenomenon might have potential applications in instantaneous one-dimensional measurements of various species in gas flow fields. <br>
</p>}},
author = {{Li, Xiaofeng and Li, Bo and Liu, Jixu and Zhu, Zhifeng and Zhang, Dayuan and Tian, Yifu and Gao, Qiang and Li, Zhongshan}},
issn = {{1094-4087}},
language = {{eng}},
number = {{4}},
pages = {{5755--5763}},
publisher = {{Optical Society of America}},
series = {{Optics Express}},
title = {{Enhancement of femtosecond laser-induced plasma fluorescence using a nanosecond laser}},
url = {{http://dx.doi.org/10.1364/OE.27.005755}},
doi = {{10.1364/OE.27.005755}},
volume = {{27}},
year = {{2019}},
}