Real-Time Monitoring and Control of Ultra-Fast Laser Engraving Process Utilizing Spectrometer | 2022 Publication type A1 Journal article (refereed), original research Author(s) Ruutiainen Mika, Roozbahani Hamid, Alizadeh Marjan, Handroos Heikki, Salminen Antti Energy - Transition to carbon-neutral world Mechanical Engineering LUT School of Energy Systems