Open AccessEfficient Ho:(Sc05Y05)2SiO5 laser at 21 µm in-band pumped by Tm fiber laser
Author(s) -
Xiaoming Duan,
Chuanpeng Qian,
Yingjie Shen,
Liangbi Su,
Lihe Zheng,
Linjun Li,
Baoquan Yao,
Dai Taguchi
Publication year - 2019
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.27.004522
Subject(s) - materials science , laser linewidth , slope efficiency , optics , laser , crystal (programming language) , absorption (acoustics) , analytical chemistry (journal) , fiber laser , absorption spectroscopy , chemistry , physics , chromatography , computer science , composite material , programming language
In this paper, we demonstrate a new 2.1-µm Ho:(Sc 0.5 Y 0.5 ) 2 SiO 5 (Ho:SYSO) laser at room temperature. The absorption and emission spectra of Ho:SYSO crystal were studied at temperature of 300 K. The strongest absorption peak of 5 I 7 level of Ho ions in SYSO crystal is located at 1943 nm with cross section of 0.79 × 10 -20 cm 2 . The maximum emission cross section of 1.74 × 10 -20 cm 2 is located at 2032 nm. A 1940.3-nm narrow-linewidth Tm fiber was used to pump the Ho:SYSO crystal. At absorbed pump power of 20.4 W, the continuous wave Ho:SYSO laser yielded 10.3 W maximum output power at 2097.67 nm and 54.7% slope efficiency respect with absorbed pump power. In addition, we have estimated the beam quality factor (M 2 ) of Ho:SYSO laser to be 1.7 near maximum output level.