High power downconversion deep-red emission from Ho3+-doped fiber lasers
Author:
Ji Shuaihao1, Song Yingyi1, Wang Zhongyu1, Shen Chenyao1, Lin Jiazhen1, Xiao Bo1, Feng Qichen1, Du Qingyang1, Xu Huiying1ORCID, Cai Zhiping1ORCID
Affiliation:
1. Department of Electronic Engineering , Xiamen University , Xiamen , 361005 , China
Abstract
Abstract
It has been a big challenge in decades for Ho3+-doped fiber laser to produce high emission power in deep-red due to its intrinsic long carrier lifetime in 5I7 energy level. Here, we advance the development of this visible fiber lasers by a novel pumping method that leverages the advantages of blue laser diode downconversion mechanisms to fully pumping, while shortening the lifetime of the lower energy level of the deep-red laser through excited state absorption. For the first time, we demonstrate a downconversion fiber laser using a single wavelength of 532 nm solid-state laser pump source to excite the Ho3+-doped ZBLAN fiber, which achieves a record high maximum output power of 1.64 W at 752.10 nm, as well as free-running of deep-red lasers with watt-level output. This technology represents a milestone in high power deep-red fiber lasers. Importantly, it is readily to be extended to other wavelengths that evidenced its huge application potentials in fiber laser industry.
Funder
National Natural Science Foundation of China
Publisher
Walter de Gruyter GmbH
Subject
Electrical and Electronic Engineering,Atomic and Molecular Physics, and Optics,Electronic, Optical and Magnetic Materials,Biotechnology
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