Wavefront control in high average-power multi-slab laser system

Jan Pilar; Stefano Bonora; Martin Divoky; Paul J. Phillips; Jodie Smith; Klaus Ertel; John Collier; Helena Jelinkova; Antonio Lucianetti; Tomáš Mocek

doi:10.1117/12.2079794

3 March 2015 Wavefront control in high average-power multi-slab laser system

Jan Pilar, Stefano Bonora, Martin Divoky, Paul J. Phillips, Jodie Smith, Klaus Ertel, John Collier, Helena Jelinkova, Antonio Lucianetti, Tomáš Mocek

Author Affiliations +

Proceedings Volume 9343, Laser Resonators, Microresonators, and Beam Control XVII; 93431N (2015) https://doi.org/10.1117/12.2079794
Event: SPIE LASE, 2015, San Francisco, California, United States

Abstract

A high average power cryogenically-cooled diode-pumped solid-state laser system for Hilase centre in Czech Republic is being developed by Central Laser Facility at Rutherford Appleton Laboratory, England in collaboration with Hilase team. The system will deliver pulses with energy of 100 J at 10 Hz repetition rate and will find applications in research and industry. The laser medium and other elements of the system are subject to heavy thermal loading which causes serious optical aberrations and degrade the output beam quality. To meet the stringent laser requirements of this kWclass laser, it is necessary to implement adaptive optics system, which will correct for these aberrations. During our research the sources of aberrations have been identified and analyzed. Based on this analysis, a suitable adaptive optics system was proposed. After finalizing numerical models, simulations and optimizations, the adaptive optics system was developed, characterized and installed in a cryogenically-cooled multi-slab laser system running up to 6 J and 10 Hz. The adaptive optics system consists of 6x6 actuator bimorph deformable mirror and wavefront sensor based on quadriwave lateral shearing interferometry operated in closed loop. The functionality of the system was demonstrated at full power.

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Jan Pilar, Stefano Bonora, Martin Divoky, Paul J. Phillips, Jodie Smith, Klaus Ertel, John Collier, Helena Jelinkova, Antonio Lucianetti, and Tomáš Mocek "Wavefront control in high average-power multi-slab laser system", Proc. SPIE 9343, Laser Resonators, Microresonators, and Beam Control XVII, 93431N (3 March 2015); https://doi.org/10.1117/12.2079794

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