Optical emission spectroscopy study of premixed C2H4/O2 and C2H4/C2H2/O2 flames for diamond growth with and without CO2 laser excitation

X. N. He; T. Gebre; X. K. Shen; Z. Q. Xie; Y. S. Zhou; Y. F. Lu

doi:10.1117/12.843933

23 February 2010 Optical emission spectroscopy study of premixed C₂H₄/O₂ and C₂H₄/C₂H₂/O₂ flames for diamond growth with and without CO₂ laser excitation

X. N. He, T. Gebre, X. K. Shen, Z. Q. Xie, Y. S. Zhou, Y. F. Lu

Author Affiliations +

Proceedings Volume 7585, Laser-based Micro- and Nanopackaging and Assembly IV; 75850A (2010) https://doi.org/10.1117/12.843933
Event: SPIE LASE, 2010, San Francisco, California, United States

Abstract

Optical emission spectroscopy (OES) measurements were carried out to study premixed C₂H₄/O₂ and C₂H₄/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 CO₂ 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.

Citation Download Citation

X. N. He, T. Gebre, X. K. Shen, Z. Q. Xie, Y. S. Zhou, and Y. F. Lu "Optical emission spectroscopy study of premixed C₂H₄/O₂ and C₂H₄/C₂H₂/O₂ flames for diamond growth with and without CO₂ laser excitation", Proc. SPIE 7585, Laser-based Micro- and Nanopackaging and Assembly IV, 75850A (23 February 2010); https://doi.org/10.1117/12.843933

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available