Numerical analysis of the DKDP-based high-energy optical parametric chirped pulse amplifier for a 100 PW class laser

Jiabing Hu; Jiabing Hu; Xinliang Wang; Yi Xu; Yi Xu; Lianghong Yu; Fenxiang Wu; Zongxin Zhang; Xiaojun Yang; Penghua Ji; Penghua Ji; Peile Bai; Peile Bai; Xiaoyan Liang; Yuxin Leng; Yuxin Leng; Ruxin Li

doi:10.1364/AO.423191

Applied Optics
Vol. 60,
Issue 13,
pp. 3842-3848
(2021)
•https://doi.org/10.1364/AO.423191

Numerical analysis of the DKDP-based high-energy optical parametric chirped pulse amplifier for a 100 PW class laser

Jiabing Hu, Xinliang Wang, Yi Xu, Lianghong Yu, Fenxiang Wu, Zongxin Zhang, Xiaojun Yang, Penghua Ji, Peile Bai, Xiaoyan Liang, Yuxin Leng, and Ruxin Li

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Jiabing Hu, Xinliang Wang, Yi Xu, Lianghong Yu, Fenxiang Wu, Zongxin Zhang, Xiaojun Yang, Penghua Ji, Peile Bai, Xiaoyan Liang, Yuxin Leng, and Ruxin Li, "Numerical analysis of the DKDP-based high-energy optical parametric chirped pulse amplifier for a 100 PW class laser," Appl. Opt. 60, 3842-3848 (2021)

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Table of Contents Category
- Lasers, Optical Amplifiers, and Laser Optics
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About this Article
History
- Original Manuscript: February 19, 2021
- Revised Manuscript: March 29, 2021
- Manuscript Accepted: March 29, 2021
- Published: April 26, 2021

Abstract

An optical parametric chirped pulse amplifier (OPCPA) based on a large-aperture DKDP crystal and pumped by a 10 kJ level Nd:glass laser can serve as the final amplifier for a 100 PW level laser. A comprehensive numerical investigation on such a high-energy OPCPA is presented in this work. The effects on the efficiency–bandwidth product induced by the deuteration level, absorption loss, temperature variation, and optimization of zero-phase-mismatch wavelength (ZPMW) are analyzed in detail. Based on the analysis above, a three-dimensional numerical simulation taking into account the effects of pumping depletion, diffraction, and walk-off shows that, by optimization of ZPMW, broadband (over 210 nm spectral width in FWHM) and high efficiency (${\gt}37\%$) amplification can be realized in the DKDP crystal even with a moderate deuteration level of 70%, which can relax the requirement of a high deuteration level in a large-aperture DKDP crystal. The numerical analysis can provide meaningful guidance for the design and construction of 100 PW class laser systems.

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Deuteration Level	Polarization	A	B
$D = 0$	$o$	$0.402 \times 10^{- 4}$	1.432
$D = 0$	$e$	$0.221 \times 10^{- 4}$	1.105
$D = 0.96$	$o$	$0.228 \times 10^{- 4}$	1.047
$D = 0.96$	$e$	$0.955 \times 10^{- 5}$	0

	$λ_{0}$ (nm)	$Δ λ_{1 / 2}$ (nm)	$Δ τ_{1 / 2}$ (ns)	Energy (J)	Beam Size $(m m \times m m)$	$m_{t}$	$m_{s}$
Signal	925	227.5	4.5	400	$360 \times 360$	4	10
Pump	527	—	5.0	10000	$370 \times 370$	6	10

$D$ (%)	Absorption	$λ_{o p t}$ (nm)	$α$ (°)	$θ$ (°)	$L$ (mm)	$Δ λ_{1 / 2}$ (nm)	$η$ (%)	FTL (fs)
70	Without	1033.0	0.242	38.020	31.3	217.4	38.24	10.5
70	With	1032.3	0.245	38.021	31.7	216.8	37.72	10.5
70	With	925.0	0.387	38.052	31.2	194.5	34.87	11.2
80	Without	992.4	0.527	37.611	31.7	228.6	41.50	10.1
80	With	990.4	0.534	37.613	32.1	226.8	40.58	10.2
80	With	925.0	0.634	37.660	31.4	196.4	35.87	11.2
97.9	Without	949.9	0.873	36.900	32.3	220.8	41.10	10.3
97.9	With	949.8	0.873	36.901	32.5	220.2	40.40	10.3
97.9	With	925.0	0.924	36.940	31.9	190.1	38.44	11.2

	EBP Variation
Temperature Change	70%	80%	97.9%
$+ 1^{\circ} C$	$- 2.0 %$	$- 2.0 %$	$- 1.0 %$
$- 1^{\circ} C$	$- 2.0 %$	$- 2.0 %$	$- 1.0 %$

Deuteration Level	Polarization	A	B
$D = 0$	$o$	$0.402 \times 10^{- 4}$	1.432
$D = 0$	$e$	$0.221 \times 10^{- 4}$	1.105
$D = 0.96$	$o$	$0.228 \times 10^{- 4}$	1.047
$D = 0.96$	$e$	$0.955 \times 10^{- 5}$	0

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Applied Optics