Spectroscopic and radiative properties study of Nd3+ doped cadmium-phosphate glasses

✍ Scribed by K.H. Mahmoud

• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 184 KB
• Volume: 405
• Category: Article
• ISSN: 0921-4526
• DOI: 10.1016/j.physb.2010.08.069

✦ Synopsis

A spectroscopic investigation is performed on Nd 3 + doped cadmium-phosphate glasses. The Judd-Ofelt analysis is applied to the glass system in order to evaluate their potential as both glass laser and amplifier materials. The phenomenological Judd-Ofelt parameters O (2) , O (4) , and O (6) are determined, their values are 4.80 Â 10 À 20 , 6.18 Â 10 À 20 , and 7.14 Â 10 À 20 cm À 2 , respectively. The quality factor for glass system is 0.86. Predicted radiative decay rates and branching ratios of transitions from Nd 3 + 4 F 3/2 state to the 4 I J manifolds are determined and analyzed. The calculated lifetime of the 4 F 3/2 metastable state of Nd 3 + is 31 ms. The results showed that 4 F 3/2 to 4 I 11/2 transition, with fluorescence at 1056 nm, has the most potential for laser application. Photoluminescence up-conversion under excitation at 488 nm laser light exhibits three emission bands of Nd 3 + ions at 541 (green), 601 (orange), and 677 nm (red). These emission bands are assigned to 4 G 7/2 -4 I 9/2 , 4 G 7/2 -4 I 11/2 , and 4 G 7/2 -4 I 13/2 transitions, respectively. Analysis of luminescence spectra enhances the use of glass system in optical displays, lasers, and optical memory devices.