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Gold nanorods as saturable absorbers for the passively Q-switched Nd:LLF laser at 1.34 μm

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Abstract

Gold nanorods (GNRs) with two different aspect ratios were successfully utilized as saturable absorbers (SAs) in a passively Q-switched neodymium-doped lutetium lithium fluoride (Nd:LLF) laser emitting at 1.34 μm. Based on the GNRs with an aspect ratio of five, a maximum output power of 1.432 W was achieved, and the narrowest pulse width was 328 ns with a repetition rate of 200 kHz. But, in the case of the GNRs with the aspect ratio of eight, a maximum output power of 1.247 W was achieved, and the narrowest pulse width was 271 ns with a repetition rate of 218 kHz. Our experimental results reveal that the aspect ratios of GNRs have different saturable absorption effects at a specific wavelength. In other words, for passively Q-switched lasers at a given wavelength, we are able to select the most suitable GNRs as an SA by changing their aspect ratio.

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DOI:10.3788/col201917.041401

所属栏目:Lasers and laser optics

基金项目:This work was supported by the Natural Science Foundation of Shandong Province, China (No. ZR2018MF033).

收稿日期:2018-12-04

录用日期:2019-01-10

网络出版日期:2019-04-01

作者单位    点击查看

Qizhang Qian:School of Information Science and Engineering, and Shandong Provincial Key Laboratory of Laser Technology and Application, Shandong University, Qingdao 266237, China
Nan Wang:Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
Shengzhi Zhao:School of Information Science and Engineering, and Shandong Provincial Key Laboratory of Laser Technology and Application, Shandong University, Qingdao 266237, China
Guiqiu Li:School of Information Science and Engineering, and Shandong Provincial Key Laboratory of Laser Technology and Application, Shandong University, Qingdao 266237, China
Tao Li:School of Information Science and Engineering, and Shandong Provincial Key Laboratory of Laser Technology and Application, Shandong University, Qingdao 266237, China
Dechun Li:School of Information Science and Engineering, and Shandong Provincial Key Laboratory of Laser Technology and Application, Shandong University, Qingdao 266237, China
Kejian Yang:School of Information Science and Engineering, and Shandong Provincial Key Laboratory of Laser Technology and Application, Shandong University, Qingdao 266237, China
Jie Zang:School of Information Science and Engineering, and Shandong Provincial Key Laboratory of Laser Technology and Application, Shandong University, Qingdao 266237, China
Houyi Ma:Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China

联系人作者:Guiqiu Li(gqiuli@sdu.edu.cn)

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引用该论文

Qizhang Qian, Nan Wang, Shengzhi Zhao, Guiqiu Li, Tao Li, Dechun Li, Kejian Yang, Jie Zang, Houyi Ma, "Gold nanorods as saturable absorbers for the passively Q-switched Nd:LLF laser at 1.34 μm," Chinese Optics Letters 17(4), 041401 (2019)

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