339  J high-energy Ti:sapphire chirped-pulse amplifier for 10  PW laser facility

Li, Wenqi; Gan, Zebiao; Yu, Lianghong; Wang, Cheng; Liu, Yanqi; Guo, Zhen; Xu, Lu; Xu, Min; Yin, Hao; Xu, Yi; Wang, Jian‐Ye; Huang, Pei; Cao, Hu; Yao, Bo; Zhang, Xiaobo; Chen, Lingru; Tang, Yue-Hua; Li, Shuai; Liu, Xingyan; Li, Shanming; He, Mingzhu; Yin, Dinjun; Liang, Xiaoyan; Leng, Yuxin; Li, Ruxin; Xu, Zhizhan

doi:10.1364/ol.43.005681

Cited by 172 publications

(88 citation statements)

References 34 publications

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“…Besides providing advantages in achievable single pass gain, the relatively long lifetime of Yb:YAG also enables pulsed pumping of amplifiers with standard laser diodes/electronics, which is not possible in short lifetime materials like Ti:Sapphire (e.g. as shown in [7], the pump lasers for Ti:Sapphire is itself a complex/expensive system). The large gain product also results in a relatively moderate saturation fluence value (9.5 J/cm 2 ), facilitating efficient extraction of stored energy without the need to operate too close to the damage threshold of optics.…”

Section: Introductionmentioning

confidence: 99%

Efficient, diode-pumped, high-power (>300W) cryogenic Yb:YLF laser with broad-tunability (995-10205 nm): investigation of E//a-axis for lasing

et al. 2019

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We present, what is to our knowledge, the first detailed lasing investigation of cryogenic Yb:YLF gain media in the E//a-axis. Compared to the usually employed E//c-axis, the a-axis of Yb:YLF provides a much broader and smooth gain profile, but this comes at the expense of reduced gain product. We have shown that, despite the lower gain, which (i) increases susceptibility to cavity losses, (ii) raises lasing threshold, and (iii) inflates thermal load, efficient and high-power lasing could be achieved in the E//a axis as well. A record continuous-wave (cw) powers above 300 W, cw slope efficiencies of 73%, and a tuning range covering the 995-1020.5 nm region were demonstrated. In quasi-cw lasing experiments, via minimization of thermal effects, slope efficiencies can be scaled up to 85%. In gain-switched operation, sub-50-µs long pulses with a peak power exceeding 2.5 kW at multi-kHz repetition rate were attained. We measured a beam quality factor below 1.5 for laser average powers up to 100 W and below 3 for laser average powers up to 300 W. Power scaling limits due to thermal effects, laser dynamics in pulsed pumping, and multicolor lasing operation potential were also investigated. The detailed results presented in this manuscript will pave the way towards development of high-power and high-energy Yb:YLF oscillators and amplifiers with sub-500-fs pulse duration.

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Section: Introductionmentioning

confidence: 99%

Efficient, diode-pumped, high-power (>300W) cryogenic Yb:YLF laser with broad-tunability (995-10205 nm): investigation of E//a-axis for lasing

et al. 2019

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“…The layout of the SULF [15] . of 21 fs [17] . However, the 10 PW-class laser prototype can only operate at one shot every 3 h. Since then, great efforts have been devoted to the upgrade of the laser repetition rate.…”

Section: Introductionmentioning

confidence: 99%

The laser beamline in SULF facility

Zhang

et al. 2020

High Pow Laser Sci Eng

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In this paper, we report the recent progress on the $1~\text{PW}/0.1~\text{Hz}$ laser beamline of Shanghai Superintense Ultrafast Laser Facility (SULF). The SULF-1 PW laser beamline is based on the double chirped pulse amplification (CPA) scheme, which can generate laser pulses of 50.8 J at 0.1 Hz after the final amplifier; the shot-to-shot energy fluctuation of the amplified pulse is as low as 1.2% (std). After compression, the pulse duration of 29.6 fs is achieved, which can support a maximal peak power of 1 PW. The contrast ratio at $-80~\text{ps}$ before main pulse is measured to be $2.5\times 10^{-11}$ . The focused peak intensity is improved by optimizing the angular dispersion in the grating compressor. The maximal focused peak intensity can reach $2.7\times 10^{19}~\text{W}/\text{cm}^{2}$ even with an $f/26.5$ off-axis parabolic mirror. The horizontal and vertical angular pointing fluctuations in 1 h are measured to be 1.89 and $2.45~\unicode[STIX]{x03BC}\text{rad}$ , respectively. The moderate repetition rate and the good stability are desirable characteristics for laser–matter interactions. The SULF-1 PW laser beamline is now in the phase of commissioning, and preliminary experiments of particle acceleration and secondary radiation under 300–400 TW/0.1 Hz laser condition have been implemented. The progress on the experiments and the daily stable operation of the laser demonstrate the availability of the SULF-1 PW beamline.

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“…Ultra-intense, ultrafast lasers [1] are widely used in strong field physics, such as laser wakefield acceleration [2,3] , high harmonic generation [4,5] and terahertz radiation [6] . These lasers are currently generated from a Ti:sapphire-based chirped pulse amplification (CPA) system [7][8][9] or nonlinear crystal-based optical parametric chirped pulse amplification (OPCPA) system [10][11][12] . Due to the short storage time, Ti:sapphire is typically pumped by frequency-doubled Nd:YAG or Nd:glass solid-state lasers, which results in a bulky and complicated system with high cost.…”

Section: Introductionmentioning

confidence: 99%

A Yb:KGW dual-crystal regenerative amplifier

Zhu

et al. 2020

High Pow Laser Sci Eng

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This study develops a Yb:KGW dual-crystal based regenerative amplifier. The thermal lensing and gain-narrowing effects are compensated by the dual-crystal configuration. Sub-nanojoule pulses are amplified to 1.5 mJ with 9 nm spectral bandwidth and 1 kHz repetition rate using chirped pulse amplification technology. Consequently, 1.2 mJ pulses with a pulse duration of 227 fs are obtained after compression. Thanks to the cavity design, the output laser was a near diffraction limited beam with M2 around 1.1. The amplifier has the potential to boost energy above 2 mJ after compression and act as a front end for a future kilohertz terawatt-class diode-pumped Yb:KGW laser system.

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339 J high-energy Ti:sapphire chirped-pulse amplifier for 10 PW laser facility

Cited by 172 publications

References 34 publications

Efficient, diode-pumped, high-power (>300W) cryogenic Yb:YLF laser with broad-tunability (995-10205 nm): investigation of E//a-axis for lasing

Efficient, diode-pumped, high-power (>300W) cryogenic Yb:YLF laser with broad-tunability (995-10205 nm): investigation of E//a-axis for lasing

The laser beamline in SULF facility

A Yb:KGW dual-crystal regenerative amplifier

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