>50 MW peak power, high brightness Nd:YAG/Cr4+:YAG microchip laser with unstable resonator

被引：10
|
作者：
Lim, Hwan Hong [1 ]
Taira, Takunori [1 ,2 ]
机构：
[1] Inst Mol Sci, Div Res Innovat & Collaborat, 38 Nishigonaka, Okazaki, Aichi 4448585, Japan
[2] RIKEN SPring 8 Ctr, Laser Driven Electron Accelerat Technol Grp, 1-1-1 Kouto, Sayo 6795148, Japan
来源：
OPTICS EXPRESS | 2022年 / 30卷 / 04期
关键词：
CRYSTAL QUARTZ; COMPOSITE; CERAMICS;
D O I：
10.1364/OE.450335
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We demonstrated a flat-convex unstable cavity Nd:YAG/Cr4+:YAG ceramic air-cooled microchip laser (MCL) generating a record 37.6 and 59.2 MW peak power pulses with an energy of 17.0 and 24.1 mJ and a width of 452 and 407 ps at 20 Hz by using a uniform power square and hexagon pump, respectively. For hexagon pump, the near field hexagon donut beam was changed in to a Bessel-like beam in far field, whose beam quality was estimated as 2nd moment M-2 of 7.67. The brightness scale of unstable resonator MCL was achieved up to 88.9 TW/(sr.cm(2)) in contrast with flat-flat cavity MCL. However, the high intense center part of Bessel-like beam increased its brightness effectively more than 8 times, up to 736 TW/(sr.cm(2)). (C) 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement
引用
收藏
页码：5151 / 5158
页数：8
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