基于石墨烯可饱和吸收体的Er∶YAG被动调Q激光器

人工晶体学报 ›› 2024, Vol. 53 ›› Issue (7): 1127-1135.

基于石墨烯可饱和吸收体的Er∶YAG被动调Q激光器

陈言^1,2, 张沛雄^1,2, 权聪³, 孙敦陆³, 李真^1,2, 陈振强^1,2

1.暨南大学物理与光电工程学院,广州 510632;
2.广东省晶体与激光技术工程研究中心,广州 510632;
3.中国科学院合肥物质科学研究院,安徽光学精密机械研究所激光技术研究中心晶体实验室,合肥 230031

收稿日期:2024-03-26 出版日期:2024-07-15 发布日期:2024-07-23
通信作者: 张沛雄,博士,教授。E-mail:pxzhang@jnu.edu.cn
作者简介:陈言(1998—),女,重庆市人,硕士研究生。E-mail:yan_chen777@163.com
基金资助:
国家自然科学基金(61935010,51972149,51872307,51702124,62175091,51702124);广东省重点领域研究发展计划(2020B0090922006);广州市科技计划(2024A03J0240)

Passively Q-Switched Er∶YAG Laser Based on Graphene Saturable Absorber

CHEN Yan^1,2, ZHANG Peixiong^1,2, QUAN Cong³, SUN Dunlu³, LI Zhen^1,2, CHEN Zhenqiang^1,2

1. College of Physics & Optoelectronic Engineering, Jinan University, Guangzhou 510632, China;
2. Guangdong Provincial Engineering Research Center of Crystal and Laser Technology, Guangzhou 510632, China;
3. Crystal Lab of Laser Technology Research Center, Anhui Institute of Optics and Fine Mechanics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China

Received:2024-03-26 Online:2024-07-15 Published:2024-07-23

摘要/Abstract

摘要： 本文研究了一种采用氙灯侧泵方式,并基于石墨烯可饱和吸收体的Er∶YAG被动调Q激光器。首先成功将石墨烯转移至Al₂O₃衬底制备得到石墨烯可饱和吸收体,并对其进行了形貌、结构及化学状态等性能表征。此外,对基于石墨烯可饱和吸收体的Er∶YAG被动调Q激光特性进行了研究,结果表明单脉冲能量从0.4 mJ增加至7 mJ,输出激光单脉冲宽度从761.2 ns下降至510 ns,最大峰值功率为13.7 kW。激光中心波长位于2 935和2 945 nm,且主波长在2 935 nm处对应的半峰全宽(FWHM)为1.535 nm。沿x和y方向的光束质量因子分别为4.45和5.76。实验结果表明,该研究为推进更低成本、谐振腔设计简单且紧凑的2.94 μm波段Er∶YAG激光器的发展提供了有效的参考依据。

关键词: 石墨烯可饱和吸收体, 氙灯侧泵, 被动调Q, Er∶YAG, ~3 μm激光

Abstract: In this paper, the Er∶YAG passively Q-switched laser using a xenon lamp side-pumping method and based on a graphene saturable absorber was investigated. Firstly, the graphene saturable absorber was successfully prepared by transferring graphene to the Al₂O₃ substrate, and its properties such as morphology, structure, and chemical state were characterized. In addition, the characteristics of the Er∶YAG passively Q-switched laser based on graphene saturable absorber were studied. The results show that the single pulse energy increases from 0.4 mJ to 7 mJ, the output laser single pulse width decreases from 761.2 ns to 510 ns, and the maximum peak power is 13.7 kW. The central wavelength of the laser is located at 2 935 and 2 945 nm, and the full width at half maximum (FWHM) corresponding to the main wavelength at 2 935 nm is 1.535 nm. The beam quality factors along the x and y directions are 4.45 and 5.76, respectively. This study provides an effective reference for developing lower cost 2.94 μm band Er∶YAG lasers with simple and compact resonant cavity designs.

Key words: graphene saturable absorber, xenon lamp side-pumping, passively Q-switched, Er∶YAG, ~3 μm laser

中图分类号:

TN248

陈言, 张沛雄, 权聪, 孙敦陆, 李真, 陈振强. 基于石墨烯可饱和吸收体的Er∶YAG被动调Q激光器[J]. 人工晶体学报, 2024, 53(7): 1127-1135.

CHEN Yan, ZHANG Peixiong, QUAN Cong, SUN Dunlu, LI Zhen, CHEN Zhenqiang. Passively Q-Switched Er∶YAG Laser Based on Graphene Saturable Absorber[J]. JOURNAL OF SYNTHETIC CRYSTALS, 2024, 53(7): 1127-1135.

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