Recent Advances on the J-KAREN laser upgrade

Kiriyama, Hiromitsu; Mori, M.; Pirozhkov, Alexander S.; Nishiuchi, Mamiko; Kando, M.; Sakaki, H.; Kon, Akira; Kanasaki, Masato; Fukuda, Yuji; Koga, James; Sagisaka, A.; Esirkepov, T. Zh.; Hayashi, Yukio; Kotaki, Hajime; Bulanov, Sergei V.; Kondo, Kiminori; Bolton, Paul R.; Mashiba, Yuji; Asakawa, M.; Slezák, Ondřej; Sawicka-Chyla, Magdalena; Jambunathan, Venkatesan; Lucianetti, Antonio; Mocek, Tomáš

doi:10.1364/cleo_si.2015.sm3m.4

Cited by 7 publications

(10 citation statements)

References 3 publications

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“…This generation of high energy, highly charged heavy ions with the intense laser field may lead to a new approach for laser-driven extraction and acceleration of exotic nuclei, especially of unstable nuclei with extremely short life times, which cannot be investigated with present high energy ion accelerators [4]. J-KAREN is a PW-class Ti:sapphire laser developed at KPSI [5]. This laser system, after initial operation in 2000, has been improved to reduce prepulses for higher contrast to ~ 2x10 12 by introducing optical parametric chirped-pulse Figure 1.…”

Section: Ultrashort Pulse Laser For High Field Science: J-karenmentioning

confidence: 99%

Damage-controlled high power lasers and plasma mirror application

Kiriyama

Ochi

Nishikino

et al. 2015

Pacific Rim Laser Damage 2015: Optical Materials for High-Power Lasers

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Following three different types of high power lasers at Kansai Photon Science Institute are overviewed and controlling the laser damages in these laser systems are described: (1) PW-class Ti:sapphire laser for high field science, (2) zigzag slab Nd:glass laser for x-ray laser pumping, and (3) high-repetition Yb:YAG thin-slab laser for THz generation. Also reported is the use of plasma mirror for characterization of short-wavelength ultrashort laser pulses. This new method will be useful to study evolution of plasma formation which leads to laser damages.

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Section: Ultrashort Pulse Laser For High Field Science: J-karenmentioning

confidence: 99%

Damage-controlled high power lasers and plasma mirror application

Kiriyama

Ochi

Nishikino

et al. 2015

Pacific Rim Laser Damage 2015: Optical Materials for High-Power Lasers

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“…High-energy lasers using neodymium doped glass extend their capability toward shorter pulse duration and improved temporal pulse contrast necessary for such applications using optical parametric chirped-pulse amplification (OPCPA) [6,7] . Lasers relying on titanium doped sapphire (Ti 3+ :Al 2 O 3 /TiSa) currently demonstrate the highest peak power for pulses in the sub-50 fs range [5,[8][9][10][11] . However, all those systems rely on flash lamps to some extent and are thus limited in pulse repetition rate due to thermal load.…”

Section: Introductionmentioning

confidence: 99%

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

Albach

Loeser

Siebold

et al. 2018

High Pow Laser Sci Eng

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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.

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“…In the context of the continuously increasing average power of high-energy class diode pumped solid-state lasers (HECDPSSLs), careful treatment of the thermal effects due to the parasitic absorption of power in optical components has become tremendously important for the further development of HEC-DPSSLs [1][2][3][4] . One of the most seriously affected optical components is the Faraday isolator (FI), because of the relatively high absorption (∼10 −3 cm −1 ) of the currently available magneto-optical elements (MOEs).…”

Section: Introductionmentioning

confidence: 99%

Faraday effect measurements of holmium oxide (Ho₂O₃) ceramics-based magneto-optical materials

Yasuhara

Furuse

Slezák

et al. 2018

High Pow Laser Sci Eng

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Faraday effect measurements of holmium oxide (Ho 2 O 3 ) ceramics-based magneto-optical materials, highly potential material candidates for high-energy laser Faraday isolators, are presented in this paper. Temperature dependence of the Verdet constant of nondoped Ho 2 O 3 ceramics was measured for temperatures 15-305 K at 1.064 µm wavelength. The Verdet constant dispersion for wavelengths 0.5-1 µm and 1.064 µm was measured for both nondoped Ho 2 O 3 ceramics and Ho 2 O 3 ceramics doped with terbium Tb 3+ (0.2 at. %) and cerium Ce 3+ (0.1 at. %) ions. The results suggest that the relatively low level of doping of Ho 2 O 3 with these ions has no significant boosting impact on the Faraday effect. Therefore, other compositions of Ho 2 O 3 ceramics-based magneto-optical materials, as well as various doping concentrations, should be further examined.

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Recent Advances on the J-KAREN laser upgrade

Cited by 7 publications

References 3 publications

Damage-controlled high power lasers and plasma mirror application

Damage-controlled high power lasers and plasma mirror application

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

Faraday effect measurements of holmium oxide (Ho₂O₃) ceramics-based magneto-optical materials

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Recent Advances on the J-KAREN laser upgrade

Cited by 7 publications

References 3 publications

Damage-controlled high power lasers and plasma mirror application

Damage-controlled high power lasers and plasma mirror application

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

Faraday effect measurements of holmium oxide (Ho2O3) ceramics-based magneto-optical materials

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Faraday effect measurements of holmium oxide (Ho₂O₃) ceramics-based magneto-optical materials