Details
| Original language | English |
|---|---|
| Pages (from-to) | 877-886 |
| Number of pages | 10 |
| Journal | Applied Physics B: Lasers and Optics |
| Volume | 97 |
| Issue number | 4 |
| Publication status | Published - 1 Dec 2009 |
| Externally published | Yes |
Abstract
Laser-induced breakdown detection (LIBD) is a well established technique for measuring size and concentration of inorganic colloids in liquids. However, most applications of LIBD are restricted to the measurement of mean sizes, which is problematic in cases of wide colloid size distributions (PSD) as typically is the case in natural systems. Evaluation of PSDs from LIBD is possible but requires detailed control of the power density within the laser focus. In the present work we describe the mathematical treatment how to calculate this power density from the beam characteristics of the light source and the optical properties of the focusing optics. The results are compared to measured spatial distributions of breakdown events of three LIBD setups.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Physics and Astronomy (miscellaneous)
- Physics and Astronomy(all)
- General Physics and Astronomy
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In: Applied Physics B: Lasers and Optics, Vol. 97, No. 4, 01.12.2009, p. 877-886.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Influence of laser beam characteristics and focusing optics on optical laser-induced breakdown detection
AU - Walther, Clemens
AU - Hauser, W.
PY - 2009/12/1
Y1 - 2009/12/1
N2 - Laser-induced breakdown detection (LIBD) is a well established technique for measuring size and concentration of inorganic colloids in liquids. However, most applications of LIBD are restricted to the measurement of mean sizes, which is problematic in cases of wide colloid size distributions (PSD) as typically is the case in natural systems. Evaluation of PSDs from LIBD is possible but requires detailed control of the power density within the laser focus. In the present work we describe the mathematical treatment how to calculate this power density from the beam characteristics of the light source and the optical properties of the focusing optics. The results are compared to measured spatial distributions of breakdown events of three LIBD setups.
AB - Laser-induced breakdown detection (LIBD) is a well established technique for measuring size and concentration of inorganic colloids in liquids. However, most applications of LIBD are restricted to the measurement of mean sizes, which is problematic in cases of wide colloid size distributions (PSD) as typically is the case in natural systems. Evaluation of PSDs from LIBD is possible but requires detailed control of the power density within the laser focus. In the present work we describe the mathematical treatment how to calculate this power density from the beam characteristics of the light source and the optical properties of the focusing optics. The results are compared to measured spatial distributions of breakdown events of three LIBD setups.
UR - http://www.scopus.com/inward/record.url?scp=71249132361&partnerID=8YFLogxK
U2 - 10.1007/s00340-009-3660-3
DO - 10.1007/s00340-009-3660-3
M3 - Article
AN - SCOPUS:71249132361
VL - 97
SP - 877
EP - 886
JO - Applied Physics B: Lasers and Optics
JF - Applied Physics B: Lasers and Optics
SN - 0946-2171
IS - 4
ER -