Optical spectroscopic analysis of cupric oxide doped barium phosphate glass for bandpass absorption filter

• This type of glass is used for bandpass absorption glass filters in the region of blue green band.
• This type of filter has a long lifetime compared with the coating bandpass filters.
• The bandstop and bandpass were studied to characterize the filter feature.

CuO nanoparticles (25 nm) have been prepared by using co-precipitation method. The formed CuO powders were doped with barium phosphate glass with a series of xCuO–(20 − x)BaO–30ZnO–10Na2O–40P2O5 in molar ratio with x = 2, 4, 6, 8, 10 and 12 and were prepared by using conventional quenching melts technique. The density has been measured by using the conventional Archimedes method, the molar volume was calculated and found, and the density and molar volume are trended in the same direction by increasing the CuO contents. The investigation of the glass state has been measured using XRD technique. The results show that no natural broadening peaks that form crystals, which proofed the systems, are completely in glass state. Some optical spectroscopic analysis was calculated from the absorbance and transmittance measurement like absorption coefficient, refractive index, extension coefficient, the optical energy gap, the cut off in UV and IR bands to the bandpass filter, which confirmed the optical properties of this type of filter.