@inproceedings{214f1d2d14794d56b69a30fbb4e346ba,
title = "Optical emission spectroscopy study of premixed C2H 4/O2 and C2H4/C2H 2/O2 flames for diamond growth with and without CO 2 laser excitation",
abstract = "Optical emission spectroscopy (OES) measurements were carried out to study premixed C2H4/O2 and C2H 4/C2H2/O2 combustion flame for diamond deposition with and without a CO2 laser excitation. Strong emissions from radicals C2 and CH were observed in the visible range in all the OES spectra acquired. By adding a continuous-wave CO2 laser to irradiate the flame at a wavelength of 10.591 μm, the common CO 2 laser wavelength, it was discovered that the emission intensities of the C2 and CH radicals were increased due to the laser beam induced excitation. OES measurements of the C2 and CH radicals were performed using different gas combinations and laser powers. The rotational temperatures in the flame were determined by analyzing the spectra of the R-branch of the A2Δ→X2Π (0, 0) electronic transition near 430 nm (CH band head). Information obtained from the OES spectra, including the emission intensities of the C2 and CH radicals, the intensity ratios, and the rotational temperatures, was integrated into the study of diamond deposition on tungsten carbide substrates for mechanism analysis of the laser induced vibrational excitation and laser-assisted diamond deposition.",
keywords = "Diamond deposition, Optical emission spectroscopy, Rotational temperature, Vibrational excitation",
author = "He, {X. N.} and T. Gebre and Shen, {X. K.} and Xie, {Z. Q.} and Zhou, {Y. S.} and Lu, {Y. F.}",
year = "2010",
doi = "10.1117/12.843933",
language = "English (US)",
isbn = "9780819479815",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
booktitle = "Laser-based Micro- and Nanopackaging and Assembly IV",
note = "Laser-based Micro- and Nanopackaging and Assembly IV ; Conference date: 26-01-2010 Through 28-01-2010",
}