UV fatigue of laser optics: laser-induced contamination

Abstract

Laser-induced contamination (LIC) can be a major concern of using UV laser systems. Surface contamination occurs via interactions between the UV laser and particulates, water vapor condensate, organics, and airborne molecular contaminates (AMC) from the environment or outgassing from system materials. A brief review of contamination of optics will lead into present results from long-term 355 nm quasi-CW laser transmission experiments at Edmund Optics. Time lapse microscopy was used to monitor nucleation and growth of surface contaminants. Laser burn boxes were constructed for use as a controlled UV LIC testbed; experimental results are presented on transmission losses for various material preparation methods.

Solid-state femtosecond UV lasers: recent advances and challenges

“…It brings the solution and valuable know-how, which is sometimes the key point for good quality and reliable UV lasers. The degradation issues might be divided into distinct causes: 1) elements degradation itself [31] and 2) degradation by laser-induced contamination [32,33]. These issues are physically very different, and to solve them, different techniques are required; however, they sum up to the same outcome -UV laser lifetime.…”