High-contrast 20 Petawatt Ti:sapphire laser system

Abstract

Abstract:We report on a 2.0 PW femtosecond laser system at 800 nm based on the scheme of chirped pulse amplification using Ti:sapphire crystals, which is the highest peak power ever achieved from a femtosecond laser system. Combining the index-matching cladding technique and the precise control of the time delay between the input seed pulse and pump pulses, the parasitic lasing in the final booster amplifier is effectively suppressed at the pump energy of 140 J at 527 nm. The maximum output energy from the final amplifier is 72.6 J, corresponding to a conversion efficiency of 47.2% from the pump energy to the output laser energy. The measured spectral width of the amplified output pulse from the final amplifier is 60.8 nm for the full width at half-maximum (FWHM) by controlling the spectral evolution in the amplifier chain, and the recompressed pulse duration is 26.0 fs. The technology of cross-polarized wave (XPW) is applied in a broadband front-end, and the pulse contrast is improved to ~1.5 × 10 −11 (−100 ps before the main pulse) which is measured at 83 TW power level with a repetition rate of 5 HZ. , 963-965 (1999). 13. F. Ple, M. Pittman, G. Jamelot, and J.-P. Chambaret, "Design and demonstration of a high-energy booster amplifier for a high-repetition rate petawatt class laser system," Opt. Lett. 32(3), 238-240 (2007). 14. V. Chvykov and K. Krushelnick, "Large aperture multi-pass amplifiers for high peak power lasers," Opt.Commun. 285(8), 2134-2136 (2012). 15. http://www.cargille.com. 16. D. C. Brown, S. D. Jacobs, and N. Nee, "Parasitic oscillations, absorption, stored energy density and heat density in active-mirror and disk amplifiers," Appl. Opt. 17(2), 211-224 (1978). 17. Y. Xu, X. Guo, X. Zou, Y. Li, X. Lu, C. Wang, Y. Liu, X. Liang, Y. Leng, R. Li, and Z. Xu, "Pulse temporal quality improvement in a petawatt Ti:sapphire laser based on cross-polarized wave generation," Opt.

High power femtosecond lasers at ELI-NP

“…Using the technique of laser energy extraction during pumping, more than 70-J energy has been obtained at the output of the final multi-pass Ti:sapphire amplifier of a 2 PW laser system, pumped by 140 J pulse energy green laser [6]. Parasitic lasing was suppressed up to 150 J pumping.…”

“…Recently, PW-class Ti:sapphire have been demonstrated worldwide [2][3][4][5][6]. Till now, the highest peak intensity of 2 x 10 22 W/cm 2 was reported by focusing the 300 TW beam of a Ti:sapphire femtosecond laser using f/1 optics [7].…”

Thermal Lensing Compensation in the Development of 30 fs Pulse Duration Chirped Pulse Amplification Laser System and Single-Shot Intensity-Phase Measurement

“…Such high peak power laser systems are used to study high harmonics generation, white light continuum generation, plasma and optical field ionization [12][13][14]. A rapid advancement in the development of high-average-peak power CPA laser systems [11,[14][15][16] has been observed in recent years. However, many technical issues related to development and characterization needs to be addressed.…”

A 110-TW multiple-beam laser system with a 5-TW wavelength-tunable auxiliary beam for versatile control of laser-plasma interaction

“…Based on the technique of chirp-pulse amplification (CPA) [22], the technology of table-top 100-TW-class laser is being developed continuously [23][24][25][26][27][28][29][30][31][32][33][34], and lasers with petawatt peak power are built at large research centers [35][36][37][38][39][40][41][42][43][44]. In the meantime, as the complexity of experiments increases, there is a growing need for precision control of laser-plasma interaction in the application of high-intensity lasers.…”