PMID- 22048358
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20120305
LR  - 20181023
IS  - 1539-4794 (Electronic)
IS  - 0146-9592 (Linking)
VI  - 36
IP  - 21
DP  - 2011 Nov 1
TI  - One-dimensional single-shot thermometry in flames using femtosecond-CARS line 
      imaging.
PG  - 4182-4
LID - 10.1364/OL.36.004182 [doi]
AB  - We report single-laser-shot one-dimensional thermometry in flames using 
      femtosecond coherent anti-Stokes Raman scattering (fs-CARS) line imaging. Fs-CARS 
      enables high-repetition-rate (1-10 kHz), nearly collision-free measurement of 
      temperature and species concentration in reacting flows. Two high-power 800 nm 
      beams are used as the pump and probe beams and a 983 nm beam is used as the 
      Stokes beam for CARS signal generation from the N2Q-branch transitions at 
       approximately 2330 cm(-1). The probe beam is frequency-chirped for single-laser-shot imaging. 
      All three laser beams are formed into sheets and crossed in a line which forms 
      the probe region. The resulting 1D line-CARS signal at  approximately 675 nm is spatially and 
      spectrally resolved and recorded as a two-dimensional (2D) image. Single-shot 
      temperature measurements are demonstrated in flat-field flames up to temperatures 
      exceeding 2000 K, demonstrating the potential of fs-CARS line imaging for 
      high-repetition-rate thermometry in turbulent flames. Such measurements can 
      provide valuable data to validate complex turbulent-combustion models as well as 
      increase the understanding of the spatio-temporal instabilities in practical 
      combustion devices such as modern gas-turbine combustors and augmentors.
FAU - Kulatilaka, W D
AU  - Kulatilaka WD
AD  - Spectral Energies, LLC, 5100 Springfield Street, Suite 301, Dayton, Ohio 45431, 
      USA. waruna.kulatilaka.ctr@wpafb.af.mil
FAU - Stauffer, H U
AU  - Stauffer HU
FAU - Gord, J R
AU  - Gord JR
FAU - Roy, S
AU  - Roy S
LA  - eng
PT  - Journal Article
PL  - United States
TA  - Opt Lett
JT  - Optics letters
JID - 7708433
EDAT- 2011/11/04 06:00
MHDA- 2011/11/04 06:01
CRDT- 2011/11/04 06:00
PHST- 2011/11/04 06:00 [entrez]
PHST- 2011/11/04 06:00 [pubmed]
PHST- 2011/11/04 06:01 [medline]
AID - 223738 [pii]
AID - 10.1364/OL.36.004182 [doi]
PST - ppublish
SO  - Opt Lett. 2011 Nov 1;36(21):4182-4. doi: 10.1364/OL.36.004182.