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In this paper we will discuss the challenges of performing comparable laser damage testing as well as a detailed analysis of the measurements conducted on the samples for this harmonisation activity. The goal of the activity is to enlarge the test capacities within ESA’s EarthExplorer space program, especially for the missions ADM Aeolus [5] and EarthCare [6], both having as main payload instruments containing high energy diode pumped nanosecond lasers. Four samples have been compared with the S-on-1 method according to ISO21254-2, two AR1064/0° windows and two silicon wafers leading to an agreement of better than 20% concerning the S-on-1 damage threshold.

Harmonisation of two nanosecond laser-induced damage testing facilities at 1064 nm in vacuum and ambient pressure