A thin-disk multi-pass pump scheme with large laser aperture

Hantian Chen; Jing Dong; Hailin Wang; Guangzhi Zhu; Xiao Zhu

doi:10.11884/HPLPB202234.210278

Journals >High Power Laser and Particle Beams >Volume 34 >Issue 3 >Page 031004 > Article

High Power Laser and Particle Beams
Vol. 34, Issue 3, 031004 (2022)

A thin-disk multi-pass pump scheme with large laser aperture

Hantian Chen^1、2, Jing Dong^1、2, Hailin Wang^1、2, Guangzhi Zhu^1、2, and Xiao Zhu^1、2、*

Author Affiliations

¹School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, China

²National Engineering Research Center for Laser Processing, Wuhan 430074, China

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DOI: 10.11884/HPLPB202234.210278 Cite this Article

Hantian Chen, Jing Dong, Hailin Wang, Guangzhi Zhu, Xiao Zhu. A thin-disk multi-pass pump scheme with large laser aperture[J]. High Power Laser and Particle Beams, 2022, 34(3): 031004 Copy Citation Text

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Fig. 1. (a) 3D structure and (b) front view of the RDSP pump scheme with 18 times pumping

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Fig. 2. Appearance of the spot of propagating (a) once (b) 12 times through the thin-disk for a triangle shaped pump spot

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Fig. 3. Experimental results of the output power and the optical to optical efficiency of the pump scheme

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evaluating indicator	ADSP	RDDP	RDSP
sharpness of pump spot	radially diffusion	diffusion in x and y direction	diffusion in x and y direction
pump spot shape that coincides perfectly	circle or regular polygon with appropriate angle	symmetric about x axis and y axis	symmetric aboutx axis and y axis
laser transmission angle	small angle only	small angle blocked	0°～90° in theory
anti-disturbance ability^[8]	low	high	low
number of reflections on mirrors in a cycle	4	5	4
cost	low (one parabolic mirror)	high (two parabolic mirrors)	low (one parabolic mirror)
adjusting difficulty	high	low	medium

Table 1. Comparison of the three pump schemes

Hantian Chen, Jing Dong, Hailin Wang, Guangzhi Zhu, Xiao Zhu. A thin-disk multi-pass pump scheme with large laser aperture[J]. High Power Laser and Particle Beams, 2022, 34(3): 031004

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