Power balancing a multibeam laser

S. Sampat; T. Z. Kosc; K. A. Bauer; R. D. Dean; W. R. Donaldson; J. Kwiatkowski; R. Moshier; A. L. Rigatti; M. H. Romanofsky; L. J. Waxer; J. H. Kelly

doi:10.1117/12.2506823

15 May 2019 Power balancing a multibeam laser

S. Sampat, T. Z. Kosc, K. A. Bauer, R. D. Dean, W. R. Donaldson, J. Kwiatkowski, R. Moshier, A. L. Rigatti, M. H. Romanofsky, L. J. Waxer, J. H. Kelly

Author Affiliations +

Proceedings Volume 10898, High Power Lasers for Fusion Research V; 108980A (2019) https://doi.org/10.1117/12.2506823
Event: SPIE LASE, 2019, San Francisco, California, United States

Abstract

Multibeam lasers often require an output beam balance that specifies the degree of simultaneity of the laser output energy, instantaneous power, or instantaneous irradiance (power per unit area). This work describes the general problem of balancing a multibeam laser. Specific techniques used to balance the output power of the 60-beam pulsed OMEGA Laser System are discussed along with a measured reduction of beam-to-beam imbalance. In particular, the square-pulse distortion induced by a simple saturating amplifier operating with its output at some fraction of its saturation fluence is derived, and a method to exchange gain between saturated amplifiers in a single beam that have different saturation fluences to adjust balance is described.

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S. Sampat, T. Z. Kosc, K. A. Bauer, R. D. Dean, W. R. Donaldson, J. Kwiatkowski, R. Moshier, A. L. Rigatti, M. H. Romanofsky, L. J. Waxer, and J. H. Kelly "Power balancing a multibeam laser", Proc. SPIE 10898, High Power Lasers for Fusion Research V, 108980A (15 May 2019); https://doi.org/10.1117/12.2506823

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