Theoretical Modeling of Damage Mechanisms for Ultrashort Laser Pulses in Ocular Media
Abstract
The funding provided in this grant has allowed the development of a comprehensive computational model for predicting the effect that any laser pulse will have on any spherical absorbing particle. This model is based upon fundamental principles an( therefore is capable of determining all thermomechanical responses (temperature rise, shock wave, explosive vaporization) and is applicable to a wide range of materials with unprecedented accuracy. This allows the assessment of potential damage to a variety of materials, such as biological tissue. The computational model is also applicable for investigating and predicting laser induced damage in synthetic polymers and optical and electronic communication materials. The research also furnishes a technique for determining thermomechanical properties of microparticles used in novel medical, biological and material science applications. In addition, we have seen evidence that the thermomechanical response in various materials to a laser pulse is not only non-linear, but chaotic. This implies that small changes in laser pulse characteristics such as duration or energy may lead to enormous changes in response that are extremely damaging to the material whether biological or synthetic. The detailed nature of the investigation and resulting model allowed for the discovery of this chaotic behavior, which had not been previously reported by any other investigators.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 31, 2002
- Accession Number
- ADA407996
Entities
People
- Bernard Gerstman
Organizations
- Florida International University