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.