Details
| Original language | English |
|---|---|
| Article number | 048001 |
| Journal | Journal of biomedical optics |
| Volume | 19 |
| Issue number | 4 |
| Publication status | Published - Apr 2014 |
| Externally published | Yes |
Abstract
We present a time-resolved photographic analysis of the pulse-to-pulse interaction. In particular, we studied the influence of the cavitation bubble induced by a fs-pulse on the optical focusing of the consecutive pulse and its cavitation bubble dynamics in dependence on temporal pulse separation in water. As a first result, by decreasing the temporal separation of laser pulses, there is a diminishment of the laser-induced optical breakdown (LIOB) efficiency in terms of energy conversion, caused by disturbed focusing into persisting gas bubbles at the focal volume. A LIOB at the focal spot is finally suppressed by impinging the expanding or collapsing cavitation bubble of the preceding pulse. These results could be additionally confirmed in porcine gelatin solution with various concentrations. Hence, the interaction between the laser and transparent ophthalmic tissue may be accompanied by a raised central laser energy transmission, which could be observed in case of a temporal pulse overlap. In conclusion, our experimental results are of particular importance for the optimization of the prospective ophthalmic surgical process with future generation fs-lasers.
Keywords
- Cavitation bubble, Fs-laser, High-repetition rate, Laser-induced optical breakdown, Ophthalmic surgery, Photodisruption, Pulse-topulse interaction
ASJC Scopus subject areas
- Materials Science(all)
- Electronic, Optical and Magnetic Materials
- Materials Science(all)
- Biomaterials
- Physics and Astronomy(all)
- Atomic and Molecular Physics, and Optics
- Engineering(all)
- Biomedical Engineering
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In: Journal of biomedical optics, Vol. 19, No. 4, 048001, 04.2014.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Effects of cavitation bubble interaction with temporally separated fs-laser pulses
AU - Tinne, Nadine
AU - Knoop, Gesche
AU - Kallweit, Nicole
AU - Veith, Sonja
AU - Bleeker, Sebastian
AU - Lubatschowski, Holger
AU - Krüger, Alexander
AU - Ripken, Tammo
PY - 2014/4
Y1 - 2014/4
N2 - We present a time-resolved photographic analysis of the pulse-to-pulse interaction. In particular, we studied the influence of the cavitation bubble induced by a fs-pulse on the optical focusing of the consecutive pulse and its cavitation bubble dynamics in dependence on temporal pulse separation in water. As a first result, by decreasing the temporal separation of laser pulses, there is a diminishment of the laser-induced optical breakdown (LIOB) efficiency in terms of energy conversion, caused by disturbed focusing into persisting gas bubbles at the focal volume. A LIOB at the focal spot is finally suppressed by impinging the expanding or collapsing cavitation bubble of the preceding pulse. These results could be additionally confirmed in porcine gelatin solution with various concentrations. Hence, the interaction between the laser and transparent ophthalmic tissue may be accompanied by a raised central laser energy transmission, which could be observed in case of a temporal pulse overlap. In conclusion, our experimental results are of particular importance for the optimization of the prospective ophthalmic surgical process with future generation fs-lasers.
AB - We present a time-resolved photographic analysis of the pulse-to-pulse interaction. In particular, we studied the influence of the cavitation bubble induced by a fs-pulse on the optical focusing of the consecutive pulse and its cavitation bubble dynamics in dependence on temporal pulse separation in water. As a first result, by decreasing the temporal separation of laser pulses, there is a diminishment of the laser-induced optical breakdown (LIOB) efficiency in terms of energy conversion, caused by disturbed focusing into persisting gas bubbles at the focal volume. A LIOB at the focal spot is finally suppressed by impinging the expanding or collapsing cavitation bubble of the preceding pulse. These results could be additionally confirmed in porcine gelatin solution with various concentrations. Hence, the interaction between the laser and transparent ophthalmic tissue may be accompanied by a raised central laser energy transmission, which could be observed in case of a temporal pulse overlap. In conclusion, our experimental results are of particular importance for the optimization of the prospective ophthalmic surgical process with future generation fs-lasers.
KW - Cavitation bubble
KW - Fs-laser
KW - High-repetition rate
KW - Laser-induced optical breakdown
KW - Ophthalmic surgery
KW - Photodisruption
KW - Pulse-topulse interaction
UR - http://www.scopus.com/inward/record.url?scp=84899535651&partnerID=8YFLogxK
U2 - 10.1117/1.JBO.19.4.048001
DO - 10.1117/1.JBO.19.4.048001
M3 - Article
C2 - 24781592
AN - SCOPUS:84899535651
VL - 19
JO - Journal of biomedical optics
JF - Journal of biomedical optics
SN - 1083-3668
IS - 4
M1 - 048001
ER -