In:
Frontiers in Chemistry, Frontiers Media SA, Vol. 8 ( 2021-1-8)
Abstract:
The effects of substitution of BaF 2 for BaO on physical properties and 1. 8 μm emission have been systematically investigated to improve spectroscopic properties in Tm 3+ doped gallium tellurite glasses for efficient 2.0 μm fiber laser. It is found that refractive index and density gradually decrease with increasing BaF 2 content from 0 to 9 mol.%, due to the generation of more non-bridging oxygens. Furthermore, OH − absorption coefficient (α OH ) reduces monotonically from 3.4 to 2.2 cm −1 and thus emission intensity near 1.8 μm in gallium tellurite glass with 9 mol.% BaF 2 is 1.6 times as large as that without BaF 2 while the lifetime becomes 1.7 times as long as the one without BaF 2 . Relative energy transfer mechanism is proposed. The maximum emission cross section and gain coefficient at around 1.8 μm of gallium tellurite glass containing 9 mol.% BaF 2 are 8.8 × 10 −21 cm 2 and 3.3 cm −1 , respectively. These results indicate that Tm 3+ doped gallium tellurite glasses containing BaF 2 appear to be an excellent host material for efficient 2.0 μm fiber laser development.
Type of Medium:
Online Resource
ISSN:
2296-2646
DOI:
10.3389/fchem.2020.628273
Language:
Unknown
Publisher:
Frontiers Media SA
Publication Date:
2021
detail.hit.zdb_id:
2711776-5