Performance demonstration of the PENELOPE main amplifier HEPA I using broadband nanosecond pulses  

作　　者：D.Albach M.Loeser M.Siebold U.Schramm 

机构地区：[1]Helmholtz–Zentrum Dresden–Rossendorf [2]Technische Universit?t Dresden

出　　处：《High Power Laser Science and Engineering》2019年第1期1-9,共9页高功率激光科学与工程（英文版）

基　　金：funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No.654148 Laserlab-Europe

摘　　要：We report on the energetic and beam quality performance of the second to the last main amplifier section HEPA I of the PENELOPE laser project. A polarization coupled double-12-pass scheme to verify the full amplification capacity of the last two amplifiers HEPA I and II was used. The small signal gain for a narrow-band continuous wave laser was 900 and 527 for a broadband nanosecond pulse, demonstrating 12.6 J of output pulse energy. Those pulses, being spectrally wide enough to support equivalent 150 fs long ultrashort pulses, are shown with an excellent spatial beam quality. A first active correction of the wavefront using a deformable mirror resulted in a Strehl ratio of 76% in the single-12-pass configuration for HEPA I.We report on the energetic and beam quality performance of the second to the last main amplifier section HEPA I of the PENELOPE laser project. A polarization coupled double-12-pass scheme to verify the full amplification capacity of the last two amplifiers HEPA I and II was used. The small signal gain for a narrow-band continuous wave laser was 900 and 527 for a broadband nanosecond pulse, demonstrating 12.6 J of output pulse energy. Those pulses, being spectrally wide enough to support equivalent 150 fs long ultrashort pulses, are shown with an excellent spatial beam quality. A first active correction of the wavefront using a deformable mirror resulted in a Strehl ratio of 76% in the single-12-pass configuration for HEPA I.

关 键 词：DIODE-PUMPED lasers LASER AMPLIFIERS LASER diagnostics pulse energy YTTERBIUM 

分 类 号：O4[理学—物理]