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

In English

Författare

Summary, in English

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

Publiceringsår

2015

Språk

Engelska

Sidor

30414-30420

Publikation/Tidskrift/Serie

Optics Express

Volym

23

Issue

23

Dokumenttyp

Artikel i tidskrift

Förlag

Optical Society of America

Ämne

  • Atom and Molecular Physics and Optics

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 1094-4087