Open AccessTm3+: Bi4Si3O12crystal as a promising laser material near 2 μm: growth, spectroscopic properties and laser performance
Author(s) -
Yan Zhang,
Liwu Huang,
Xiaoming Duan,
Zheng Gong,
Tian Tian,
Y. Ma,
And Jiayue Xu
Publication year - 2021
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.435229
Subject(s) - materials science , luminescence , laser , absorption spectroscopy , crystal (programming language) , slope efficiency , optics , analytical chemistry (journal) , spontaneous emission , spectroscopy , radiative transfer , doping , emission spectrum , crystal growth , branching fraction , atomic physics , spectral line , optoelectronics , fiber laser , physics , chemistry , crystallography , chromatography , quantum mechanics , astronomy , computer science , programming language
We report on the crystal growth, spectroscopic properties and laser performance of Tm 3+ -doped Bi 4 Si 3 O 12 (BSO) crystal. The crystal was grown by the vertical Bridgeman method. The spectroscopic properties are investigated based on absorption and luminescence spectroscopy. Judd - Ofelt (JO) analysis is performed to calculate the spontaneous emission probabilities, branching ratio and the radiative lifetimes. The absorption spectrum, emission spectrum and gain cross-section spectra of Tm 3+ : BSO crystal are determined for the 2 μm transition. Luminescence decay kinetic of 3 F 4 upper level was analysed in detail. The continuous-wave 2 μm laser with a maximum output power of 650 mW and a slope efficiency of 29.7% is demonstrated for the first time. The beam quality factor (M 2 ) of Tm 3+ : BSO laser was about 1.03 at the maximum output level.