Tracer-free laser-induced grating spectroscopy using a pulse burst laser at 100 kHz.
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Authors
De Domenico, Francesca
Guiberti, Thibault F
Roberts, William L
Publication Date
2019-10Journal Title
Optics express
ISSN
1094-4087
Publisher
Optical Society of America (OSA)
Volume
27
Issue
22
Pages
31217-31224
Language
eng
Type
Article
This Version
AM
Physical Medium
Print
Metadata
Show full item recordCitation
De Domenico, F., Guiberti, T. F., Hochgreb, S., Roberts, W. L., & Magnotti, G. (2019). Tracer-free laser-induced grating spectroscopy using a pulse burst laser at 100 kHz.. Optics express, 27 (22), 31217-31224. https://doi.org/10.1364/oe.27.031217
Abstract
This work shows the first application of a burst laser for Laser-Induced Grating Spectroscopy (LIGS) diagnostics. High repetition rate (100 kHz) LIGS is performed in non-reacting and reacting flows using the fundamental harmonic of a Nd:YAG pulse-burst laser as pump. In the first part of the paper, we demonstrate the first time-resolved, high repetition rate electrostrictive LIGS measurements in a sinusoidally-modulated helium jet, allowed by the highly energetic pulses delivered by the burst laser (around 130 mJ per pulse). In the second part of the paper, we perform thermal LIGS measurements in a premixed laminar methane/air flame. Thermal gratings are generated in the flame products from the water vapour, which weakly absorbs 1064 nm light. Thus, this work demonstrates the potential of seeding-free high repetition rate LIGS as a technique to detect and time-resolve the instantaneous speed of sound, temperature, and composition in unsteady flow processes.
Sponsorship
King Abdullah University of Science and Technology (KAUST); KAUST Visiting Students
Program; Honorary Vice-Chancellor’s Award and Qualcomm/DTA Studentship (University of
Cambridge); EPSRC project (EP/K02924X)
Funder references
EPSRC (EP/K02924X/1)
Embargo Lift Date
2022-10-03
Identifiers
External DOI: https://doi.org/10.1364/oe.27.031217
This record's URL: https://www.repository.cam.ac.uk/handle/1810/297439
Rights
All rights reserved