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Fabrication and Optical Properties of Highly Transparent Er : YAG Polycrystalline Ceramics for Eye‐Safe Solid‐State Lasers“
Author(s) -
Qin Xianpeng,
Yang Hao,
Shen Deyuan,
Chen Hao,
Zhou Guohong,
Luo Dewei,
Zhang Jian,
Wang Shiwei,
Ma Jan,
Tang Dingyuan
Publication year - 2012
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/j.1744-7402.2011.02732.x
Subject(s) - materials science , ceramic , transparent ceramics , laser , er:yag laser , lasing threshold , crystallite , microstructure , wavelength , optoelectronics , attenuation coefficient , grain size , optics , composite material , metallurgy , physics
Highly transparent 1 at.% Er : YAG ceramics was fabricated by a reactive sintering method under vacuum. The optical properties, the microstructure and the laser performance of the Er : YAG ceramics were investigated. The average grain size of the Er : YAG ceramics was 7~8 μm. The in‐line transmittances of the Er : YAG ceramics at the wavelength of 1800 and 400 nm were about 84.6% and 82.4%, respectively. The absorption coefficient of the Er : YAG ceramics was 1.29 cm −1 . The grain boundaries were very clean and no secondary phase was observed. When end‐pumped by an Er , Yb ‐fiber laser at 1532 nm, a maximum output power of 13.8 W lasing at the wavelength of 1645 nm was obtained with a slope efficiency of 54.5%.