High-power temporal and spatial coherent pulse combination of ultrafast fiber lasers
Stark H, Müller M, Buldt J, Klenke A, Steinkopff A, Tünnermann A, Limpert J (2019)
Publication Type: Conference contribution
Publication year: 2019
Journal
Publisher: SPIE
Book Volume: 11370
Pages Range: 128-130
Conference Proceedings Title: Proceedings of SPIE - The International Society for Optical Engineering
Event location: Bol, HRV
ISBN: 9781510635128
Abstract
Ultrafast high-power laser systems with diffraction-limited beam quality are an indispensable technology in a variety of applications, which usually strongly benefit from higher pulse energies and average powers or inevitably require them. However, the output performance of laser systems is limited. To reach the desired parameters and further scale the output pulse energy and average power of ultrafast lasers, coherent pulse combination is one of the most promising techniques. Basing on this principle, we present two different approaches and most recent experimental results. On the one hand, electro-optically controlled divided-pulse amplification is introduced as a temporal domain coherent pulse combination technique. Here, instead of a single pulse, a pulse burst is amplified and recombined afterwards into a single pulse. The technique is implemented for the first time in a high-energy ytterbium-doped fiber laser system using additional spatial combination of 12 fiber amplifiers. The result is a combined signal of 674 W average power and 23 mJ pulse energy, while a sample was compressed to 235 fs pulse duration. On the other hand, a turn-key operable ultrafast high-average power system based on coherent beam combination of 4 fiber amplifiers is presented. The combined output has 3.5 kW average power at a pulse repetition rate of 80 MHz and a pulse duration of 430 fs. Both results, the high pulse energy and the high average power, are to the best of our knowledge the highest values achieved with ultrafast fiber-based laser systems so far.
Involved external institutions
Germany (DE)How to cite
APA:
Stark, H., Müller, M., Buldt, J., Klenke, A., Steinkopff, A., Tünnermann, A., & Limpert, J. (2019). High-power temporal and spatial coherent pulse combination of ultrafast fiber lasers. In Igor Jovanovic, Bojan Resan, Karoly Osvay, Giacomo Coslovich (Eds.), Proceedings of SPIE - The International Society for Optical Engineering (pp. 128-130). Bol, HRV: SPIE.
MLA:
Stark, Henning, et al. "High-power temporal and spatial coherent pulse combination of ultrafast fiber lasers." Proceedings of the Ultrafast Optics XII 2019, Bol, HRV Ed. Igor Jovanovic, Bojan Resan, Karoly Osvay, Giacomo Coslovich, SPIE, 2019. 128-130.
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