Er^(3+)掺杂硼硅酸盐玻璃的近红外发射特性研究

Near Infrared Luminescence Properties of Er^(3+) Doped Borosilicate Glass

利用高温熔融法合成了掺Er3+硼硅酸盐玻璃。测量了样品的吸收光谱,由J-O理论得到了强度参数Ωλ(λ=2,4,6)及一些相关参数。用970nm光激发测量了10～300K之间的近红外发射光谱。利用McCumber理论拟合得到了1.53μm发射的受激发射截面,并与测量得到的发射光谱线形符合较好。由受激发射截面和发射光谱得到的半高全宽分别为59和56nm。利用能级简化模型讨论了样品的红外变温发射光谱,提出了增大1.53μm发射带宽的途径。

A kind of Er3+ doped borosilicate glass was prepared with the convenient high temperature melting technology. The absorption spectrum of the sample was measured. The JO parameters Ωλ(λ=2, 4, 6) and radiative transition probabilities were calculated by the JO theory. Under the excitation of 970 nm light, the near infrared fluorescence spectra at the temperature range of 10～300 K were obtained. The calculated 1.53 μm stimulated emission crosssection spectrum is in agreement with the measured fluorescence line shape. Both the bandwidth of stimulated emission crosssection and the fluorescence spectra are more than 70 nm. Temperature variation of the spectra was discussed by using a simplified energy level model. A way to broaden 1.53 μm emission band of Er3+ doped glass was proposed.