One-order-higher Cr4+ conversion efficiency in Cr4+:YAG transparent ceramics for a high-frequency passively Q-switched laser

Shan, Yingshuang1; Zhang, Le1,2,3; Zhou, Tianyuan1,2; Shao, Cen1; Zhang, Lei4; Ma, Yuelong1,5; Yao, Qing1,5; Jiang, Zhigang1,5; Selim, Farida A.2; Chen, Hao1

2019-08

10.1364/PRJ.7.000933

Photonics Research   影响因子和分区

2327-9125

The Cr4+-doped yttrium aluminum garnet (Cr4+:YAG) saturable absorber, a new generation of passively Q-switched solid-state laser material, faces a significant obstacle of low conversion rate of chromium from trivalent to tetravalent, degrading efficiency in a passively Q-switched laser. In this paper, highly transparent Cr4+:YAG ceramics were fabricated and committed to compare the laser performance with Cr4+:YAG crystals on a 1 mu m passively Q-switched laser. Thanks to the grain boundary effect, the Cr4+ conversion efficiency of 0.05 at.% Cr4+:YAG transparent ceramics coated with high transparency (HT) films (T = 86.46% at 1064 nm) was nine times higher than that of 0.1 at.% Cr4+:YAG single crystals coated with HT films (T = 84.00% at 1064 nm). Differing from the counterpart Cr4+:YAG crystals, no absorption saturation tendency was observed for the 0.05 at.% Cr:YAG ceramics when the pump power exceeded similar to 1900 mW. Furthermore, the repetition frequency reached 217 kHz for 0.05 at.% Cr:YAG ceramics, which was a three-fold factor increase from that of the corresponding single crystal. The advantages of transparent ceramics over single crystals were proved through laser performance for the first time, to the best of our knowledge. This study also provided compelling evidence for replacing single crystals with ceramics for ultrafast dynamics. (C) 2019 Chinese Laser Press

SCI ; EI

英语

其他

Key Research and Development Project of Jiangsu Province[BE2018062] ; Key Research and Development Project of Jiangsu Province[BE2019112]

Optics

Optics

WOS:000478104100017

OPTICAL SOC AMER

20193407349816

Ceramic materials ; Conversion efficiency ; Efficiency ; Grain boundaries ; Q switched lasers ; Q switching ; Saturable absorbers ; Solid state lasers ; Yttrium aluminum garnet

Energy Conversion Issues:525.5 ; Lasers:744 ; Ceramics:812.1 ; Production Engineering:913.1 ; Crystalline Solids:933.1

Web of Science

1.Jiangsu Normal Univ, Sch Phys & Elect Engn, Jiangsu Key Lab Adv Laser Mat & Devices, Xuzhou 221116, Jiangsu, Peoples R China
2.Bowling Green State Univ, Dept Phys & Astron, Bowling Green, KY 43403 USA
3.Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA
4.Southern Univ Sci & Technol, SUSTech Acad Adv Interdisciplinary Studies, Shenzhen 518055, Peoples R China
5.Jiangsu Univ, Sch Mech Engn, Zhenjiang 212013, Jiangsu, Peoples R China

Shan, Yingshuang,Zhang, Le,Zhou, Tianyuan,et al. One-order-higher Cr4+ conversion efficiency in Cr4+:YAG transparent ceramics for a high-frequency passively Q-switched laser[J]. Photonics Research,2019,7(8):933-938.

Shan, Yingshuang.,Zhang, Le.,Zhou, Tianyuan.,Shao, Cen.,Zhang, Lei.,...&Chen, Hao.(2019).One-order-higher Cr4+ conversion efficiency in Cr4+:YAG transparent ceramics for a high-frequency passively Q-switched laser.Photonics Research,7(8),933-938.

Shan, Yingshuang,et al."One-order-higher Cr4+ conversion efficiency in Cr4+:YAG transparent ceramics for a high-frequency passively Q-switched laser".Photonics Research 7.8(2019):933-938.