光子功能材料与器件研究室知识库

A serial of novel fluoro-tellurite glasses with compositions of 60TeO(2)-20BaO-(20-x)ZnO-xZnF(2) (x = 0, 2, 4, 5 and 6 mol%) were prepared. The compositional dependences of glass structural evaluation, Raman gain coefficient, UV-Vis transmission spectrum, IR transmission spectrum, linear refractive index and third-order nonlinearity were analyzed. The results showed that the addition of 6 mol% ZnF2 can further improve the Raman gain coefficient to as well as 52 x 10(-11) cm/W and effectively decrease around 73% and 57% absorption coefficients respectively caused by free O-H groups (@3.3 gm) and hydrogen-bonded O-H groups (@4.5 gm) in glass. Addition of ZnF2 does not change the UV-Vis absorption edge, optical band gap energy and infrared region cut-off edge almost, while the linear refraction index and ultrafast third-nonlinearity show unmonotonic changes. These novel fluoro-tellurite glasses may be suitable candidates for using in mid-infrared Raman fiber laser and/or amplifier. (C) 2017 Elsevier B.V. All rights reserved.