Novel Nonlinear Laser Diagnostic Techniques.
Abstract
This report describes research on novel laser-based diagnostic techniques in two areas: (1) extension of laser-based diagnostics to shorter wavelengths, allowing two-photon detection of atomic ions; and (2) investigation of the feasibility of obtaining quantitative concentration and velocity measurements using amplified spontaneous emission (ASE). For the first task, we have developed a high power VUV source based on two-photon-resonant difference frequency mixing of a ArF excimer laser and a frequency-doubled Nd:YAG-pumped dye laser in krypton gas. Up to 6 micro J at 147 nm have been generated, and the characteristics of the mixing process have been studied. On the second task, we have performed the first measurement of the ASE bandwidth, indicating that temperature and velocity measurements may be possible. Measurement of ASE in a variety of flames demonstrate that the ASE signal intensity can be influenced by gas collisions.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 26, 1991
- Accession Number
- ADA240193
Entities
People
- D. L. Huestis
- Gregory W. Faris
- Jay. B. Jeffries
Organizations
- SRI International