Electron. J. Math. Phys. Sci., 2002, 1, 1, 104-113

 

NIR EMISSION SPECTRA OF (Er³⁺: Yb³⁺) DOPED SiO₂-TiO₂-Al₂O₃ SOL-GEL GLASSES

 

Qing Xiang , Chan Hin Kam, Kantisara Pita  and Srinivasa Buddhudu ^*

Photonics Research Group, School of Electrical and Electronic Engineering

Nanyang Technological University, Nanyang Avenue, Singapore 639798

 

^*Corresponding Author. E-mail: ebsrin@ntu.edu.sg

 

Received: 20 February 2002/ Accepted: 12 May 2002/ Published: 22 August 2002

Abstract: The present paper reports the near infrared (NIR) emission spectra of Er³⁺: Yb³⁺ co-doped SiO₂-Al₂O₃-TiO₂ sol-gel glasses. Upon optical pumping either with 980nm(Diode Laser) or 488nm (Ar⁺ ion laser), the NIR emission transition (⁴I_13/2®⁴I_15/2) at 1550nm of (Er³⁺:Yb³⁺) glasses have revealed an improved intensity by many times compared with the Er³⁺ singly doped sol-gel glass. The dependence of the emission intensity and lifetimes on the Yb³⁺/Er³⁺ values and also the Er³⁺ concentration change has been investigated.

 

Keywords: (Er³⁺:Yb³⁺) sol-gel glasses-emission spectra

PACS: 81.20F; 32.30; 78.55

 

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