Spectral analysis of cavity chemiluminescence of a combustion-driven HF laser fueled by NF3

Liucheng Li; Liping Duo; Yuanhu Wang; Shukai Tang; Haijun Yu; Guofu Li; Jian Wang

doi:10.1117/12.2065285

3 February 2015 Spectral analysis of cavity chemiluminescence of a combustion-driven HF laser fueled by NF3

Liucheng Li, Liping Duo, Yuanhu Wang, Shukai Tang, Haijun Yu, Guofu Li, Jian Wang

Proceedings Volume 9255, XX International Symposium on High-Power Laser Systems and Applications 2014; 92552E (2015) https://doi.org/10.1117/12.2065285
Event: XX International Symposium on High Power Laser Systems and Applications, 2014, Chengdu, China

Abstract

The visible and near infrared spectra of cavity chemiluminescence of a combustion driven HF laser fueled by NF₃were collected and analyzed. The spectral line at 529 nm for the green chemiluminescence was attributed to electronic excited NF molecules in b¹∑ state, i.e. NF(b). The diffuse bands from 570 nm to 700 nm were attributed to the N₂(B-A) emission. The spectral lines from 850 nm to 1000 nm were attributed to the HF Δυ = 3 emission bands. At the end of every experiment, the spectral line at 874 nm would be observed, which was attributed to the electronic excited NF molecules in a¹ Δ state, i.e. NF(a). The NF(a-X) emission was found experimentally to be always avoiding the HFΔυ = 3 emission bands. It was also found experimentally that the NF(b-X) emission always accompanied the HF Δυ = 3 emission bands and their emission intensities had the same trends as a function of experimental time. Whereas the NF(a) molecules was produced in the optical cavity directly by the reaction of H atoms with NF₂ molecules in the incomplete combustion effluents, the NF(b) molecules were suggested to be produced mainly by the near resonant energy transfer from vibrational excited HF(v<=2) molecules to NF(a) molecules. In other words, the vibrational excited state HF(v<=2) molecules can be efficiently deactivated by the NF(a) molecules by near resonant V-E energy transfer process. Therefore we concluded that incomplete dissociation of NF₃ might be harmful to the HF(v<=2) population.

Citation Download Citation

Liucheng Li, Liping Duo, Yuanhu Wang, Shukai Tang, Haijun Yu, Guofu Li, and Jian Wang "Spectral analysis of cavity chemiluminescence of a combustion-driven HF laser fueled by NF3", Proc. SPIE 9255, XX International Symposium on High-Power Laser Systems and Applications 2014, 92552E (3 February 2015); https://doi.org/10.1117/12.2065285

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

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
8 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Molecules

Chemiluminescence

Molecular energy transfer

Optical resonators

Hydrogen fluoride lasers

Chemical lasers

Hydrogen

Show All Keywords

Keywords/Phrases

Search In:

Publication Years