Watt-level ~2 μm laser output in Tm3+-doped tungsten tellurite glass double-cladding fiber.

We report, for the first time to the best of our knowledge, a watt level cw fiber laser at ~2 μm from a piece of 40-cm-long newly developed highly thulium-doped (3.76 × 10(20) ions/cm(3)) tungsten tellurite glass double cladding fiber pumped by a commercial 800 nm laser diode. The maximum output power of the fiber laser reaches 1.12 W. The slope efficiency and the optical-optical efficiency with respect to the absorbed pump are 20% and 16%, respectively. The lasing threshold is 1.46 W, and the lasing wavelength is centered at 1937 nm.

[1]  Zhidong Yao,et al.  Highly efficient high-power thulium-doped germanate glass fiber laser. , 2007, Optics letters.

[2]  Lili Hu,et al.  Energy transfer and 1.8 μm emission in Tm3+/Yb3+ codoped lanthanum tungsten tellurite glasses , 2010 .

[3]  Anderson S. L. Gomes,et al.  Evaluation of the third-order nonlinear optical properties of tellurite glasses by thermally managed eclipse Z-scan , 2009 .

[4]  Shibin Jiang,et al.  2μm lasing from highly thulium doped tellurite glass microsphere , 2005 .

[5]  E. M. Vogel,et al.  Tellurite glass: a new candidate for fiber devices , 1994 .

[6]  N. Peyghambarian,et al.  Ultracompact cladding-pumped 35-mm-short fiber laser with 4.7-W single-mode output power , 2006 .

[7]  Animesh Jha,et al.  Efficient ~2 μm Tm 3+ -doped tellurite fiber laser , 2008 .

[8]  李科峰,et al.  WO3含量对Tm3+掺杂TeO2-WO3-La2O3玻璃热学性能及光谱性质的影响 , 2010 .

[9]  Animesh Jha,et al.  Tellurite glass lasers operating close to 2 μm , 2010 .

[10]  W Sibbett,et al.  Spectroscopic and lasing performance of Tm3+-doped bulk TZN and TZNG tellurite glasses operating around 1.9 microm. , 2008, Optics express.

[11]  Neil P. Sessions,et al.  Spectroscopy of Tm3+-doped tellurite glasses for 1470 nm fiber amplifier , 2002 .

[12]  Animesh Jha,et al.  ∼2 μm Tm3+/Yb3+-doped tellurite fibre laser , 2009 .

[13]  Brian M. Walsh,et al.  Review of Tm and Ho materials; spectroscopy and lasers , 2009 .

[14]  Norman P. Barnes,et al.  Comparison of Tm : ZBLAN and Tm : silica fiber lasers; Spectroscopy and tunable pulsed laser operation around 1.9 μm , 2004 .