1. Steen, W.M., Mazunder, J.: Laser Material Processing, Springer, 4th edition, ISBN 1849960615 (2010).
2. Quality and performance of laser cutting with a high power SM fiber laser;Kristiansen;NoLamp14,2013
3. The relevance of brightness for high power laser cutting and welding;Petring;ICALEO2008,2008
4. OptoSkandproduct catalogue“Prealigned External Optics D50 1237”, Optoscand(2012).
5. ISO 11146-1 Lasers and laser-related equipment — Test methods for laser beam widths, divergence angles and beam propagation ratios (2005).