离子交换铒掺杂硅酸盐玻璃波导光放大特性

Characterization of Ion Exchange Erbium-Doped Silica Glass Amplifiers

将集成光学放大器用于光纤通信系统中是人们越来越感兴趣的课题 ,由此导致人们寻找与此相适应的稀土掺杂玻璃材料。给出了一系列Er3 + /Yb3 + 共掺杂硅酸盐玻璃波导的制备和光谱特性的基本结果。平面和条型波导均由Ag+ Na+ 离子交换技术制备。光谱测量显示 ,所有样品在 153 2nm都观测到了荧光发射峰 ,其半高谱宽为 19nm。用波长为 514 .5nm和 980nm的激光抽运 ,测得多数样品中Er3 + 离子在亚稳态4I13 /2 能级上的荧光寿命均为 7ms左右。Er3 + /Yb3 + 共掺杂玻璃的上转换均低于单掺Er3 + 玻璃。用 2 50mW ,波长为 980nm的激光抽运 3 .5cm长的条形波导 ,在 153 6nm波段下得到的最大净增益是 5dB ,增益谱的半峰全宽是 14nm。

The growing interest for the use of integrated optical amplifiers in optical fiber telecom has led to deep search for better rare-earth-doped glassy materials. Some properties of a set of Er3+/Yb3+-doped silicate glass are reported. Planar and channel waveguides are fabricated by Ag+-Na+ ion exchange. Spectral measurement shows that the fluorescence emission peak for all the samples is observed at 1532 nm, with a full-width at half-maximum (FWHM) equal to 19 nm. Measurements of the lifetime of the metastable state (4I13/2) of Er3+ are performed upon excitation by laser pumps at 514.5 nm and 980 nm, and life time of the order of 7 ms is measured in most samples. The intensity of the up-conversion fluorescence in Er3+/Yb3+ co-doped glass is less than that in Er3+-doped one. 5 dB net gain at the wavelength of 1536 nm is obtained in a 3.5 cm long channel waveguide with 250 mW pump power at 980 nm and the FWHM is 14 nm.