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Infrared broadband emission of bismuth-doped barium-aluminum-borate glasses

Xian-geng Meng, Jian-rong Qiu, Ming-ying Peng, Dan-ping Chen, Quan-zhong Zhao, Xiong-wei Jiang, and Cong-shan Zhu

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Abstract

We report near infrared broadband emission of bismuth-doped barium-aluminum-borate glasses. The broadband emission covers 1.3µm window in optical telecommunication systems. And it possesses wide full width at half maximum (FWHM) of ~200nm and long lifetime as long as 350µs. The luminescent properties are quite sensitive to glass compositions and excitation wavelengths. Based on energy matching conditions, we suggest that the infrared emission may be ascribed to 3P1→3P0 transition of Bi+. The broad infrared emission characteristics of this material indicate that it might be a promising candidate for broadband optical fiber amplifiers and tunable lasers.

©2005 Optical Society of America

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Figures (8)
Fig. 1.
Fig. 1. Absorption spectra of (95-x)B2O3-xBaO-5Al2O3-2Bi2O3 (in mol%, x=20, 25, 30, 35, 40)

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Fig. 2.
Fig. 2. Fluorescence spectra of (95-x)B2O3-xBaO-5Al2O3-2Bi2O3 (in mol%, x=20, 25, 30, 35, 40) when excited by 808nm LD

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Fig. 3.
Fig. 3. Peak position and FWHM of the fluorescence of (95-x)B2O3-xBaO-5Al2O3-2Bi2O3 (in mol%, x=20, 25, 30, 35, 40), λ ex=808nm.

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Fig. 4.
Fig. 4. Integrated intensity and lifetime of the fluorescence of (95-x)B2O3-xBaO-5Al2O3-2Bi2O3 (in mol%, x=20, 25, 30, 35, 40), λ ex=808nm.

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Fig. 5.
Fig. 5. Integrated intensity and FWHM of the 1272nm fluorescence of bismuth-doped 70B2O3-25BaO-5Al2O3 glasses as a function of Bi2O3 concentration (mol%), λ ex=808nm.

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Fig. 6.
Fig. 6. The lifetime of the 1272nm fluorescence of bismuth-doped 70B2O3-25BaO-5Al2O3 glass as a function of Bi2O3 concentration (mol%), λ ex=808nm.

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Fig. 7.
Fig. 7. The fluorescence spectra of 75B2O3-20BaO-5Al2O3-2Bi2O3, the excitation wavelengths are 532nm Nd:YAG laser and 808nm LD excitation.

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Fig. 8.
Fig. 8. Energy level diagram for Bi+, which is proposed based on energy matching conditions (NIR: near infrared emission).

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