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Proceedings Paper

~2.1 um Tm[sup]3+[/sup]-Ho[sup]3+[/sup] co-doped tungsten tellurite single mode fiber laser
Author(s): Kefeng Li; Guang Zhang; Lili Hu; Meng Wang; Danping Chen
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Paper Abstract

We investigate the spectroscopic and lasing performance of Tm3+-Ho3+ co-doped tungsten tellurite single mode fiber operating around 2.1 μm with a commercial 800 nm diode laser pump source. The optimum doping concentration of Tm2O3 and Ho2O3 in Tm3+-Ho3+ co-doped TeO2-WO3-La2O3 (TWL) glass is 1 mol% and 0.5 mol%, respectively. The lifetime of Ho3+:5I7 level is 3.3 ms in the bulk glass. The maximum stimulated emission cross-section of Ho3+ in TWL is 10.0×10-21cm2. The tungsten tellurite single mode fibers are prepared by using rod-in-tube method. The infrared emission spectra are compared with varying fiber lengths. Tm3+-Ho3+ co-doped fiber shows weak emission at ~1.9 μm very strong emission at ~2.1 μm, which indicates efficient energy transfer from Tm3+ to Ho3+ in the fiber. The 1.47 μm emission increases with the increment of the fiber length, which means a back energy transfer from Ho3+ to Tm3+. A 106 mW continuous wave laser emission at ~2.1 μm is demonstrated from a 16 cm length of this fiber, the slope efficiency is 23%, corresponding to a 17% optical to optical efficiency. Lasing has also been achieved in <5 cm length of this fiber, making this material a promising candidate for single frequency ~2.1 μm laser sources.

Paper Details

Date Published: 19 March 2012
PDF: 6 pages
Proc. SPIE 8257, Optical Components and Materials IX, 82570A (19 March 2012); doi: 10.1117/12.907159
Show Author Affiliations
Kefeng Li, Shanghai Institute of Optics and Fine Mechanics (China)
Guang Zhang, Shanghai Institute of Optics and Fine Mechanics (China)
Graduate School of Chinese Academy of Sciences (China)
Lili Hu, Shanghai Institute of Optics and Fine Mechanics (China)
Meng Wang, Shanghai Institute of Optics and Fine Mechanics (China)
Danping Chen, Shanghai Institute of Optics and Fine Mechanics (China)


Published in SPIE Proceedings Vol. 8257:
Optical Components and Materials IX
Shibin Jiang; Michel J. F. Digonnet; J. Christopher Dries, Editor(s)

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