I. A. Begishev,1 S.-W. Bahk,1 C. Dorrer,1 C. Feng,1 M. J. Guardalben,1 C. Jeon,1 R. G. Roides,1 M. Spilatro,1 B. Webb,1 D. Weiner,1 J. D. Zuegel,1 J. Bromage1
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Optical parametric chirped-pulse amplification (OPCPA) using high-energy Nd:glass lasers has the potential to produce ultra-intense pulses (>1023 W/cm2). We report on the performance of the final high-efficiency amplifier in an OPCPA system, based on large-aperture (63 x 63-mm2) partially deuterated potassium dihydrogen phosphate (DKDP) crystals. The seed beam (170 nm, 100 mJ) was provided by the preceding OPCPA stages. The maximum pump-to-signal conversion efficiency of 33% was achieved with a 52-mm-long DKDP crystal and 40-J pump energy at 527 nm due to the flattop super-Gaussian pump beam profile and flat-in-time pulse shape. The 11.8-J output signal was compressed to 20 fs.
I. A. Begishev,S.-W. Bahk,C. Dorrer,C. Feng,M. J. Guardalben,C. Jeon,R. G. Roides,M. Spilatro,B. Webb,D. Weiner,J. D. Zuegel, andJ. Bromage
"A highly efficient, 10-J output signal amplifier for ultra-intense all-OPCPA systems", Proc. SPIE 11666, High Power Lasers for Fusion Research VI, 1166607 (5 March 2021); https://doi.org/10.1117/12.2578059
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I. A. Begishev, S.-W. Bahk, C. Dorrer, C. Feng, M. J. Guardalben, C. Jeon, R. G. Roides, M. Spilatro, B. Webb, D. Weiner, J. D. Zuegel, J. Bromage, "A highly efficient, 10-J output signal amplifier for ultra-intense all-OPCPA systems," Proc. SPIE 11666, High Power Lasers for Fusion Research VI, 1166607 (5 March 2021); https://doi.org/10.1117/12.2578059