DocumentCode :
79546
Title :
Author :
Song Gao ; Pei-Wen Kuan ; Xueqiang Liu ; Danping Chen ; Meisong Liao ; Lili Hu
Author_Institution :
Key Lab. of Mater. for High Power Laser, Shanghai Inst. of Opt. & Fine Mech., Shanghai, China
Volume :
27
Issue :
16
fYear :
2015
fDate :
Aug.15, 15 2015
Firstpage :
1702
Lastpage :
1704
Abstract :
A single-mode laser output of 0.75 W near 2 μm was obtained with a slope efficiency of 28.7% with respect to the absorbed pump power when a self-developed double-cladding Tm3+-doped tellurium germanate glass fiber laser was pumped using a 793-nm diode laser. The core glass possesses an infrared cutoff edge reaching ~5 μm. The calculated peak emission cross section of Tm3+ at 1.9 μm was 6.8 × 10-21 cm2. The measured fluorescence lifetime of 3F4 energy level was 2.96 ms. A single-mode double-cladding tellurium germanate glass fiber was fabricated in house using the rod-in-tube drawing technique. The lasing threshold was 0.56 W and the lasing wavelength was centered at 1968 nm. Spatial beam quality of the fiber was measured and a value of M2 = 1.36 was obtained.
Keywords :
Q-factor; fibre lasers; fluorescence; laser beams; laser modes; optical fibre cladding; optical fibre fabrication; optical pumping; semiconductor lasers; tellurium compounds; thulium; GeO2-TeO2-PbO-La2O3-Al2O3-CaO-SrO-Li2O:Tm; absorbed pump power; beam quality factor M2; diode laser pumping; energy level; fluorescence lifetime; infrared cutoff edge; lasing threshold; lasing wavelength; peak emission cross section; rod-in-tube drawing technique; self-developed double-cladding glass fiber laser; single-mode laser output; slope efficiency; spatial beam quality; time 2.96 ms; wavelength 1.9 mum; wavelength 1968 nm; wavelength 793 nm; Fiber lasers; Glass; Laser excitation; Measurement by laser beam; Power lasers; Pump lasers; Tellurium; $sim 2$ $mu $ m; -2um; Fiber laser; fiber laser; tellurium germanate glass;
fLanguage :
English
Journal_Title :
Photonics Technology Letters, IEEE
Publisher :
ieee
ISSN :
1041-1135
Type :
jour
DOI :
10.1109/LPT.2015.2438077
Filename :
7113827
Link To Document :
