Hi Clemente,

We are working here with a 20W CO2 laser system (Merchantek) and BrF5.

The BaF2 windows are from:

Korth Kristalle GMBH
Am Jägersberg 3
D-24161 Altenholz (Kiel)
Fax: 043136905-25

Usually windows are not breaking.

They are breaking only if:
- power is close to 100%
- windows get "cloudy" (although they can be repolished)

Cheers,

Ana-Voica