The effect of S b a t% on structural and linear/nonlinear optical properties was studied theoretically and experimentally for S e 85− x T e 15 S b x (x= 10, 12.5 a n d 15 a t%) glasses. The structural characterization was examined using EDX, XRD, DTA and FTIR. The calculated mean coordination number N C N, average constraints number N s, overall mean bond energy E b and average heat of atomization H S increase with S b a t%, which reflects an increase in the system rigidity and correlated to the increase in crosslinking with Sb at%. The linear/nonlinear optical constants such as optical energy gap E g, Urbach's energy E e, linear refractive index n, nonlinear refractive index n 2, the third order susceptibility χ (3) and the electronic polarizability α p are all evaluated and discussed for the studied films. The dispersion parameters were analyzed using Wemple-DiDomenico model of single oscillator model and the optical/electrical/thermal conductivities and electronic properties were deduced. The optical energy gap Eg, optical conductivities σopt and single oscillator energy Eo decreased while the Urbach's energy Ee and the refractive index n increased with Sbat%. Assessment of linear/nonlinear and other optical and physical parameters shows that Se70Te15Sb15 could be a candidate for several photonic applications.