Emission properties of 1.8 and 2.3 μm in Tm3+-doped fluoride glass


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Abstract

In this work a Tm3+-doped fluoride glass with good thermal stability is prepared. Intensive 1.8 and 2.3 μm emissions are obtained when pumped by an 800 nm laser diode. And the 1.48 μm emission is limited because of the much strong radiation around 1.8 μm. On the basis of absorption spectrum, radiative properties are investigated and discussed according to Judd–Ofelt parameters (Ω2, Ω4, Ω6) calculated by Judd–Ofelt theory. Besides, absorption and emission cross-sections of 3F43H6 transition are figured out and analyzed by using McCumber and Beer–Lambert theories. The high gain around 1.8 μm was predicted by the large σemiτrad product (29.8 × 10–21 cm2 ms). The results obtained indicate that the Tm3+-doped fluoride glass can be a promising 2.0 μm laser glass material.

About the authors

Fangwei Qi

College of Materials Science and Engineering

Email: shiqingxu@cjlu.edu.cn
China, Hangzhou, 310018

Feifei Huang

College of Materials Science and Engineering

Author for correspondence.
Email: huangfeifei@cjlu.edu.cn
China, Hangzhou, 310018

Ruoshan Lei

College of Materials Science and Engineering

Email: shiqingxu@cjlu.edu.cn
China, Hangzhou, 310018

Ying Tian

College of Materials Science and Engineering

Email: shiqingxu@cjlu.edu.cn
China, Hangzhou, 310018

Long Zhang

College of Materials Science and Engineering; Key Laboratory of Materials for High Power Laser, Shanghai Institute of Optics and Fine Mechanics

Email: shiqingxu@cjlu.edu.cn
China, Hangzhou, 310018; Shanghai, 201800

Junjie Zhang

College of Materials Science and Engineering

Email: shiqingxu@cjlu.edu.cn
China, Hangzhou, 310018

Shiqing Xu

College of Materials Science and Engineering

Author for correspondence.
Email: shiqingxu@cjlu.edu.cn
China, Hangzhou, 310018

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