학술논문

Highly stable thin-disk multipass amplifier delivering 1kW of average output power with excellent beam quality
Document Type
Conference
Source
2021 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC) Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC), 2021 Conference on. :1-1 Jun, 2021
Subject
Communication, Networking and Broadcast Technologies
Components, Circuits, Devices and Systems
Engineered Materials, Dielectrics and Plasmas
Engineering Profession
Fields, Waves and Electromagnetics
Photonics and Electrooptics
Optical fiber amplifiers
Thermomechanical processes
Power amplifiers
Surface emitting lasers
Laser stability
Materials processing
Laser ablation
Language
Abstract
Ultrafast lasers have become essential for many fields of material processing such as precise ablation, drilling of micro-holes or surface structuring [1] - [3] . Among other power amplifier schemes, thin-disk multipass amplifiers (TDMPA) are known to deliver both high average power and high pulse energy. However, compared to fibre amplifiers they may be limited in stability due to the long propagation length and may suffer from thermo-mechanically induced beam degradation. In this contribution we address the main limitations observed in previous TDMPAs [4] , [5] , to achieve excellent beam quality as compared to what is typically achieved with fiber amplifiers at the same power levels.