0.4 J/10 ns/10 kHz‐4 kW coherent beam combined laser using stimulated Brillouin scattering phase conjugation mirrors for industrial applications

Abstract

A laser system that can produce 0.4 J/10 ns/10 kHz‐4 kW using a coherent beam combination with stimulated Brillouin scattering phase conjugate mirrors (SBS‐PCMs) is proposed. The 4 kW coherent beam combination laser system consists of a front‐end system, a pre‐amplifier module, a coherent beam divider/combiner, and 4 main amplifier modules. The front‐end system produces 1064 nm @ 10 kHz laser pulses, and it is amplified by the pre‐amplifier. After the pre‐amplifier module, the laser beam is divided into 4 sub‐beams. Each sub‐beam is amplified by the main amplifier module in a double‐pass configuration and reflected by SBS‐PCMs. Sub‐beams are combined by a coherent beam combiner, and the output of the total system is designed to be 4 kW. With this 4 kW laser module, high‐speed 2D holographic laser processing will be utilized. (© 2013 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

Current status of Kumgang laser system

“…Kumgang laser is a 4 kW beam combination laser system using self-phase-controlled SBS-PCMs [14]. It is designed to achieve a high repetition rate and high energy output for the 2D laser machining with a hologram.…”

Current status of the development of the Kumgang laser

“…At KAIST, the development of a 4 kW beam combination laser system using self-phasecontrolled SBS-PCMs, called the "Kumgang laser," started in 2012 and is scheduled to be completed in 2015 [8]. This paper presents the recent progress on the development of the Kumgang laser.…”