Bi 첨가 알루미노실리케이트 유리에서 Li 및 Ge 공첨가가 광 특성에 미치는 영향
Optical Characteristics of Bismuth-doped Aluminosilicate Glass Codoped with Li and Ge
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근적외선에서 발광하는 새로운 증폭 매질인 Bi 첨가 알루미노실리케이트 유리의 용융 온도를 낮추면서도 증폭 특성이 향상될 수 있도록 금속 산화물을 첨가한 샘플을 제작하여 분광학적 특성을 분석하였다. Li2O의 조성비가 증가하면 형광스펙트럼의 반폭치는 증가하지만 형광 강도가 저하되고, GeO2의 영향으로는 반폭치와 형광 강도가 동시에 증가하였다. GeO2를 첨가한 시료에서 광 증폭 특성을 측정한 결과, 이전의 벌크 샘플에서 얻었던 것보다 우수한 증폭 특성을 가지고 있음을 확인하였다.
Abstract
The possibility of improving amplification characteristics and lowering the melting point of bismuth-doped aluminosilicate glass as a new amplification material, which has broadband near-infrared emission at 1300 nm regions, was investigated. Spectroscopic analysis of bismuth-doped aluminosilicate glass shows that the addition of an alkali metal oxide, Li2O increases FWHM of fluorescence spectrum but decreases fluorescence intensity, while GeO2 composition increases both FWHM of fluorescence spectrum and fluorescence intensity. Also, excellent optical amplification gain characteristics in a GeO2-added sample were observed.
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