Damage Mechanisms In Polymers Upon NIR Femtosecond Pulse Laser Irradiation: Sub-Threshold Processes And Their Implications For Laser Safety Applications

Journal Article · Fri Oct 08 04:00:00 EDT 2010 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3507148· OSTI ID:21454846

Bonse, Joern; Krueger, Joerg ^[1]; Solis, Javier ^[2]; Spielmann, Christian ^[3]; Lippert, Thomas ^[4]

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1. BAM Bundesanstalt fuer Materialforschung und -pruefung, Unter den Eichen 87, D-12205 Berlin (Germany)
2. Laser Processing Group, Instituto de Optica, CSIC, Serrano 121, E-28006 Madrid (Spain)
3. Friedrich-Schiller-Universitaet Jena, Max-Wien-Platz 1, D-07743 Jena (Germany)
4. Paul Scherrer Institut, CH-5232 Villigen (Switzerland)

This contribution investigates laser-induced damage of thin film and bulk polymer samples, with the focus on physical processes occurring close to the damage threshold. In-situ real-time reflectivity (RTR) measurements with picosecond (ps) and nanosecond (ns) temporal resolution were performed on thin polymer films on a timescale up to a few microseconds ({mu}s). A model for polymer thin film damage is presented, indicating that irreversible chemical modification processes take place already below the fluence threshold for macroscopic damage. On dye-doped bulk polymer filters (as used for laser goggles), transmission studies using fs-and ps-laser pulses reveal the optical saturation behavior of the material and its relation to the threshold of permanent damage. Implications of the sub-threshold processes for laser safety applications will be discussed for thin film and bulk polymer damage.

• OSTI ID: 21454846
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1278; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABLATION
DAMAGE
DOPED MATERIALS
DYES
ELECTROMAGNETIC RADIATION
FILMS
FILTERS
INFRARED RADIATION
IRRADIATION
LASER RADIATION
LASERS
MATERIALS
MODIFICATIONS
NEAR INFRARED RADIATION
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
POLYMERS
PULSED IRRADIATION
RADIATIONS
REFLECTIVITY
SURFACE PROPERTIES
THIN FILMS