Passively Q-switched erbium doped fiber laser using a gold nanostars based saturable absorber
In this paper, we propose and demonstrate an all-fiber passively Q-switched erbium doped fiber laser (EDFL) by using gold nanostars (GNSs) as a saturable absorber (SA) for the first time, to the best of our knowledge. In comparison with other gold nanomorphologies, GNSs have multiple localized surface plasmon resonances, which means that they can be used to construct wideband ultrafast pulse lasers. By inserting the GNS SA into an EDFL cavity pumped by a 980 nm laser diode, a stable passively Q-switched laser at 1564.5 nm was achieved for a threshold pump power of 40 mW. By gradually increasing the pump power from 40 to 120 mW, the pulse duration decreases from 12.8 to 5.3 μs and the repetition rate increases from 10 to 17 kHz. Our results indicate that the GNSs are a promising SA for constructing pulse lasers.
基金项目：National Natural Science Foundation of China (NSFC)10.13039/501100001809 (11474132, 61378004, 61527823, 61605058, 61605219); Natural Science Foundation of Jilin Province10.13039/100007847 (20160520085JH); Key Technology Research and Development Project of Jilin Province (20180201120GX); Major Science and Technology Tendering Project of Jilin Province (20170203012GX); Joint Foundation from Equipment Pre-research and Ministry of Education (6141A02022413); Outstanding Young Talent Fund Project of Jilin Province (20180520188JH).
Mingyi Liu：State Key Laboratory on Integrated Optoelectronics, College of Electronic Science & Engineering, Jilin University, Changchun 130012, China
Zhenwei Li：Changchun Observatory, NAO, Chinese Academy of Sciences, Changchun 130012, China
Siqing Li：State Key Laboratory on Integrated Optoelectronics, College of Electronic Science & Engineering, Jilin University, Changchun 130012, China
Zhixu Jia：State Key Laboratory on Integrated Optoelectronics, College of Electronic Science & Engineering, Jilin University, Changchun 130012, China
Chengzhi Liu：Changchun Observatory, NAO, Chinese Academy of Sciences, Changchun 130012, China
Weiping Qin：State Key Laboratory on Integrated Optoelectronics, College of Electronic Science & Engineering, Jilin University, Changchun 130012, China
Guanshi Qin：State Key Laboratory on Integrated Optoelectronics, College of Electronic Science & Engineering, Jilin University, Changchun 130012, China
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Zhe Kang, Mingyi Liu, Zhenwei Li, Siqing Li, Zhixu Jia, Chengzhi Liu, Weiping Qin, and Guanshi Qin, "Passively Q-switched erbium doped fiber laser using a gold nanostars based saturable absorber," Photonics Research 6(6), 549 (2018)