Optimal design of ultrahigh-energy laser amplifier chain with high storage energy extraction

Qiang Liu; Hailong Hong; Xing Fu; Zhan Sui; Lei Huang; Mali Gong

doi:10.1364/AO.52.007942

Applied Optics
Vol. 52,
Issue 33,
pp. 7942-7949
(2013)
•https://doi.org/10.1364/AO.52.007942

Optimal design of ultrahigh-energy laser amplifier chain with high storage energy extraction

Qiang Liu, Hailong Hong, Xing Fu, Zhan Sui, Lei Huang, and Mali Gong

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Qiang Liu, Hailong Hong, Xing Fu, Zhan Sui, Lei Huang, and Mali Gong, "Optimal design of ultrahigh-energy laser amplifier chain with high storage energy extraction," Appl. Opt. 52, 7942-7949 (2013)

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Abstract

This paper presents the concept of constant-fluence amplification. It refers to the fact that laser fluence anywhere in the amplifier gain medium is identical to the design fluence $E_{design}$ , which represents the maximum allowed fluence in consideration of the laser-induced damage threshold (LIDT). Based on this concept, we explore ideal amplifier model (IAM) and near-ideal amplifier chain (NIAC) and propose an optimal NIAC design method and analytically offer an indicator of the extraction efficiency. Finally, the paper discusses the influences of losses on the NIAC’s extraction efficiency.

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Equations (31)

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	Stage Number	Output Energy	Beam Aperture (cm)	Gain Medium Length (cm)	Storage Energy (kJ)	$η$ (%)
One-pass	Two-stage	970.0 J	9.8	206.8	5.016	45.5
		10 kJ	31.6	67.9	16.979
	Three-stage	330.0 J	5.7	185.3	1.528	60.0
		3.044 kJ	17.4	65.5	4.983
		10 kJ	31.6	40.6	10.154
	Four-stage	166.6 J	4.1	171.6	0.715	67.5
		1.423 kJ	11.9	63.7	2.268
		4.561 kJ	21.4	40.0	4.557
		10 kJ	31.6	29.1	7.279
Two-pass	Two-stage	748.7 J	8.7	101.2	1.895	77.0
		10 kJ	31.6	44.4	11.097
	Three-stage	214.6 J	4.6	89.1	0.478	88.6
		2.495 J	15.8	43.2	2.696
		10 kJ	31.6	32.4	8.109
	Four-stage	98.3 J	3.1	81.6	0.200	92.6
		1.034 kJ	10.2	42.4	1.095
		3.995 kJ	20.0	32.0	3.192
		10 kJ	31.6	25.3	6.317
Four-pass	One-stage	10 kJ	31.6	64.9	16.218	61.7
	Two-stage	333.6 J	5.8	50.4	0.421	98.0
		10 kJ	31.6	39.2	9.789
	Three-stage	70.4 J	2.7	45.3	0.080	99.5
		1.563 kJ	12.5	38.6	1.507
		10 kJ	31.6	33.8	8.461
Eight-pass	One-stage	10 kJ	31.6	40.5	10.129	98.7
	Two-stage	171.4 J	4.1	40.0	0.171	100
		10 kJ	31.6	39.3	9.829

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Applied Optics