Fiber-bundle-based 2D Raman and Rayleigh imaging for major species and temperature measurement in laminar flames

In this Letter, we introduce a novel fiber-bundle-based 2D Raman and Rayleigh imaging system for 2D measurements of major species mole fractions and temperature in flames. A cascade of dichroic mirrors and bandpass filters separate the Raman signal associated with each major species and direct it to...

Full description

Saved in:
Bibliographic Details
Published in:Optics letters 2022-08, Vol.47 (15), p.3764-3767
Main Authors: Yu, Tao, Yang, Chaobo, Sharma, Priybrat, AlRamadan, Abdullah S., Magnotti, Gaetano
Format: Article
Language:English
Subjects:
Bandpass filters
CCD cameras
Diffusion flames
Flames
Imaging
Temperature measurement
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In this Letter, we introduce a novel fiber-bundle-based 2D Raman and Rayleigh imaging system for 2D measurements of major species mole fractions and temperature in flames. A cascade of dichroic mirrors and bandpass filters separate the Raman signal associated with each major species and direct it to a custom-built four-inputs/one-output fiber bundle. The single output of the fiber bundle allows simultaneous detection of four species by using a single back-illuminated CCD camera. The novel imaging system combined with a pulse-burst laser operated at 10 kHz and a 10 kHz optical shutter is characterized from measurements in a Mckenna burner and then applied to a flame stabilized over a Santoro burner. The work is, to the best of our knowledge, the first demonstration of 2D measurements of temperature and major species (i.e . , N 2 , O 2 , H 2 , and H 2 O) in H 2 –air diffusion flames at atmospheric pressure.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.467713