Calcium boro fluoro zinc phosphate glasses modified using alkali oxide and doped with Nd 3+ and Er 3+ ions with the chemical composition of 69.5 (B 2 O 3 ) + 10) were prepared using a conventional melt quenching technique. The results of X-ray diffraction patterns indicated the amorphous nature of all the prepared glasses. The visiblenear-infrared red (NIR) absorption spectra of these glasses were analyzed systematically. The NIR emission spectra of Er 3+ and Nd 3+ :calcium boro fluoro zinc phosphate glasses showed prominent emission bands at 1536 nm ( 4 I 13/2 ! 4 I 15/2 ) and 1069 nm ( 4 F 3/2 ! 4 I 11/2 ) respectively with λ exci = 514.5 nm (Ar + laser) as the excitation source.
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