Mid-IR (3–4 μm) fluorescence and ASE studies in Dy3+ doped tellurite and germanate glasses and a fs laser inscribed waveguide

We present the fluorescence spectroscopy of a range of Dy3+ doped tellurite (TeO2) and germanate (GeO2) glasses and compare with Dy3+ doped ZBLAN glass. When excited using an 808?nm laser diode, Dy3+ ions emit radiation at around 3??m from the 6H13/2??6H15/2 (3500?cm?1) energy level transition, which has been exploited in Dy3+ doped fluoride fibre lasers. When Dy3+ is doped into TeO2 and GeO2 based glasses, the fluorescence from the 6H13/2??6H15/2 transition is shown to be broader and red-shifted compared to that in ZBLAN glass. Mid-IR ASE from a fs laser inscribed Dy3+ doped tellurite glass waveguide is also presented. The results of Dy3+ mid-IR fluorescence spectroscopy and the potential of oxide glasses as mid-IR sources are discussed.

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

[2]  R Osellame,et al.  Femtosecond laser written optical waveguide amplifier in phospho-tellurite glass. , 2010, Optics express.

[3]  W. Wadsworth,et al.  Low loss silica hollow core fibers for 3-4 μm spectral region. , 2012, Optics express.

[4]  Animesh Jha,et al.  Rare-earth ion doped TeO2 and GeO2 glasses as laser materials , 2012 .

[5]  N. Boetti,et al.  Energy level decay processes in Ho3+-doped tellurite glass relevant to the 3 μm transition , 2011 .

[6]  Michel J. F. Digonnet,et al.  Rare-Earth-Doped Fiber Lasers and Amplifiers, Revised and Expanded , 2001 .

[7]  J. Lousteau,et al.  Fluorogermanate glass with reduced content of OH-groups for infrared fiber optics , 2009 .

[8]  Animesh Jha,et al.  Structural origin of spectral broadening of 1.5-μm emission in Er 3+ -doped tellurite glasses , 2000 .

[9]  Terence A. King,et al.  Efficient 2.96 μm dysprosium-doped fluoride fibre laser pumped with a "Nd:YAG" laser operating at 1.3 μm , 2006 .

[10]  M Cronin-Golomb,et al.  Over 4000 nm bandwidth of mid-IR supercontinuum generation in sub-centimeter segments of highly nonlinear tellurite PCFs. , 2008, Optics express.

[11]  S. Jackson.  Singly Ho3+-doped fluoride fibre laser operating at 2.92 [micro sign]m , 2004 .

[12]  Xiushan Zhu,et al.  10-W-level diode-pumped compact 2.78 μm ZBLAN fiber laser , 2007 .

[13]  Angela B. Seddon,et al.  Fluorotellurite glasses with improved mid-infrared transmission , 2003 .

[14]  A Jha,et al.  Review on structural, thermal, optical and spectroscopic properties of tellurium oxide based glasses for fibre optic and waveguide applications , 2012 .

[15]  E. Dianov,et al.  Demonstration of CO2-laser power delivery through chalcogenide-glass fiber with negative-curvature hollow core. , 2011, Optics express.

[16]  J Schneider,et al.  Characterization of a Ho(3+)-doped fluoride fiber laser with a 3.9-mum emission wavelength. , 1997, Applied optics.

[17]  Joseph S. Hayden,et al.  Continuous melting of phosphate laser glasses , 2000 .