23 mJ high-power fiber CPA system using electro-optically controlled divided-pulse amplification

Abstract

The pulse-energy scaling technique electro-optically controlled divided-pulse amplification is implemented in a high-power ultrafast fiber laser system based on coherent beam combination. A fiber-integrated front end and a multi-pass cell based back end allow for a small footprint and a modular implementation. Bursts of 8 pulses are amplified parallel in up to 12 ytterbium-doped large-pitch fiber amplifiers. Subsequent spatio-temporal coherent combination of the 96 total amplified pulse replicas to a single pulse results in a pulse energy of 23 mJ at an average power of 674 W, compressible to a pulse duration of 235 fs. To the best of our knowledge, this is the highest pulse energy ever accomplished with a fiber CPA system.

References in corpus (3)

• 1kW 1mJ 8-channel ultrafast fiber laser
• 3.5 kW coherently combined ultrafast fiber laser
• Electro-optically controlled divided-pulse amplification

Cited by in corpus (2)

• 1 kW, 10 mJ, 120 fs coherently combined fiber CPA laser system
• Investigation of spatiotemporal output beam profile instabilities from differentially pumped capillaries