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

Tao Yu, Chaobo Yang, Priybrat Sharma, Abdullah S. AlRamadan, Gaetano Magnotti

Research output: Contribution to journalArticlepeer-review

Abstract

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., N2, O2, H2, and H2O) in H2–air diffusion flames at atmospheric pressure.
Original languageEnglish (US)
Pages (from-to)3764-3767
Number of pages4
JournalOptics Letters
Volume47
Issue number15
DOIs
StatePublished - Jul 21 2022

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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