Abstract
We report on time resolved imaging of the dynamic events taking place during laser-induced damage in the bulk of fused silica samples with nanosecond temporal resolution and one micron spatial resolution. These events include: shock/pressure wave formation and propagation, transient absorption, crack propagation and formation of residual stress fields. The work has been performed using a time-resolved microscope system that utilizes a probe pulse to acquire images at delay times covering the entire timeline of a damage event. Image information is enhanced using polarized illumination and simultaneously recording the two orthogonal polarization image components. For the case of fused silica, an electronic excitation is first observed accompanied by the onset of a pressure wave generation and propagation. Cracks are seen to form early in the process and reach their final size at about 25 ns into the damage event. In addition, changes that in part are attributed to transient absorption in the modified material are observed for delays up to about 200 microseconds.
| Original language | English (US) |
|---|---|
| Title of host publication | Proceedings of SPIE - The International Society for Optical Engineering |
| Volume | 7132 |
| DOIs | |
| State | Published - 2008 |
| Externally published | Yes |
| Event | 40th Annual Boulder Damage Symposium - Laser-Induced Damage in Optical Materials: 2008 - Boulder, CO, United States Duration: Sep 22 2008 → Sep 24 2008 |
Other
| Other | 40th Annual Boulder Damage Symposium - Laser-Induced Damage in Optical Materials: 2008 |
|---|---|
| Country | United States |
| City | Boulder, CO |
| Period | 9/22/08 → 9/24/08 |
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Keywords
- Damage mechanisms
- Fused silica
- Laser damage
- Laser-induced modifications
ASJC Scopus subject areas
- Applied Mathematics
- Computer Science Applications
- Electrical and Electronic Engineering
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
Cite this
Time-resolved imaging of material response during laser-induced bulk damage in SiO 2 . / Demos, S. G.; Negres, R. A.
Proceedings of SPIE - The International Society for Optical Engineering. Vol. 7132 2008.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Time-resolved imaging of material response during laser-induced bulk damage in SiO 2
AU - Demos, S. G.
AU - Negres, R. A.
PY - 2008
Y1 - 2008
N2 - We report on time resolved imaging of the dynamic events taking place during laser-induced damage in the bulk of fused silica samples with nanosecond temporal resolution and one micron spatial resolution. These events include: shock/pressure wave formation and propagation, transient absorption, crack propagation and formation of residual stress fields. The work has been performed using a time-resolved microscope system that utilizes a probe pulse to acquire images at delay times covering the entire timeline of a damage event. Image information is enhanced using polarized illumination and simultaneously recording the two orthogonal polarization image components. For the case of fused silica, an electronic excitation is first observed accompanied by the onset of a pressure wave generation and propagation. Cracks are seen to form early in the process and reach their final size at about 25 ns into the damage event. In addition, changes that in part are attributed to transient absorption in the modified material are observed for delays up to about 200 microseconds.
AB - We report on time resolved imaging of the dynamic events taking place during laser-induced damage in the bulk of fused silica samples with nanosecond temporal resolution and one micron spatial resolution. These events include: shock/pressure wave formation and propagation, transient absorption, crack propagation and formation of residual stress fields. The work has been performed using a time-resolved microscope system that utilizes a probe pulse to acquire images at delay times covering the entire timeline of a damage event. Image information is enhanced using polarized illumination and simultaneously recording the two orthogonal polarization image components. For the case of fused silica, an electronic excitation is first observed accompanied by the onset of a pressure wave generation and propagation. Cracks are seen to form early in the process and reach their final size at about 25 ns into the damage event. In addition, changes that in part are attributed to transient absorption in the modified material are observed for delays up to about 200 microseconds.
KW - Damage mechanisms
KW - Fused silica
KW - Laser damage
KW - Laser-induced modifications
UR - http://www.scopus.com/inward/record.url?scp=62149105848&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=62149105848&partnerID=8YFLogxK
U2 - 10.1117/12.804245
DO - 10.1117/12.804245
M3 - Conference contribution
VL - 7132
BT - Proceedings of SPIE - The International Society for Optical Engineering
ER -