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Single-shot, planar infrared imaging in flames using polarization spectroscopy

Sun, Zhiwei LU ; Zetterberg, Johan LU ; Alwahabi, Zeyad; Aldén, Marcus LU and Li, Zhongshan LU (2015) In Optics Express 23(23). p.30414-30420
Abstract
Planar infrared visualization of species in flames is challenging due to the severe thermal radiation background and relatively weak fluorescence quantum yields from ro-vibration transitions. In this express, we report imaging of molecular species in a flame via an absorption-based coherent optical method, namely infrared polarization spectroscopy (IRPS). Single-shot, planar imaging of hydrogen fluoride (HF) has been achieved in a premixed CH4/O-2 Bunsen flame, being seeded with a small amount of SF6. The HF molecule was excited through a rovibrational transition at around 2.5 mu m, which belongs to the fundamental vibration band. High spatial resolution was guaranteed using an orthorgonal pump-probe geometry, and an effective suppression... (More)
Planar infrared visualization of species in flames is challenging due to the severe thermal radiation background and relatively weak fluorescence quantum yields from ro-vibration transitions. In this express, we report imaging of molecular species in a flame via an absorption-based coherent optical method, namely infrared polarization spectroscopy (IRPS). Single-shot, planar imaging of hydrogen fluoride (HF) has been achieved in a premixed CH4/O-2 Bunsen flame, being seeded with a small amount of SF6. The HF molecule was excited through a rovibrational transition at around 2.5 mu m, which belongs to the fundamental vibration band. High spatial resolution was guaranteed using an orthorgonal pump-probe geometry, and an effective suppression of thermal background emission was achieved owing to the coherent nature of the demonstrated two-dimensional IRPS. Other advantages, e.g. high temporal resolution and species-specificity, are also features of this laser-based technique, which make it suitable for imaging of non-fluorescent but infrared active gaseous molecules in harsh environments. (C) 2015 Optical Society of America (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Optics Express
volume
23
issue
23
pages
30414 - 30420
publisher
OSA
external identifiers
  • wos:000366611500106
  • scopus:84957007684
ISSN
1094-4087
DOI
10.1364/OE.23.030414
language
English
LU publication?
yes
id
a1ffce6f-868c-4d22-90c3-2bce85e943d3 (old id 8556614)
date added to LUP
2016-01-28 09:41:37
date last changed
2017-06-11 04:18:17
@article{a1ffce6f-868c-4d22-90c3-2bce85e943d3,
  abstract     = {Planar infrared visualization of species in flames is challenging due to the severe thermal radiation background and relatively weak fluorescence quantum yields from ro-vibration transitions. In this express, we report imaging of molecular species in a flame via an absorption-based coherent optical method, namely infrared polarization spectroscopy (IRPS). Single-shot, planar imaging of hydrogen fluoride (HF) has been achieved in a premixed CH4/O-2 Bunsen flame, being seeded with a small amount of SF6. The HF molecule was excited through a rovibrational transition at around 2.5 mu m, which belongs to the fundamental vibration band. High spatial resolution was guaranteed using an orthorgonal pump-probe geometry, and an effective suppression of thermal background emission was achieved owing to the coherent nature of the demonstrated two-dimensional IRPS. Other advantages, e.g. high temporal resolution and species-specificity, are also features of this laser-based technique, which make it suitable for imaging of non-fluorescent but infrared active gaseous molecules in harsh environments. (C) 2015 Optical Society of America},
  author       = {Sun, Zhiwei and Zetterberg, Johan and Alwahabi, Zeyad and Aldén, Marcus and Li, Zhongshan},
  issn         = {1094-4087},
  language     = {eng},
  number       = {23},
  pages        = {30414--30420},
  publisher    = {OSA},
  series       = {Optics Express},
  title        = {Single-shot, planar infrared imaging in flames using polarization spectroscopy},
  url          = {http://dx.doi.org/10.1364/OE.23.030414},
  volume       = {23},
  year         = {2015},
}