离子交换铒掺杂硅酸盐玻璃波导光放大特性

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Er^3 ／Yb^3 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1532nm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Er^3 离子在亚稳态^4I13.2能级上的荧光寿命均为7ms左右。Er^3 ／Yb^3 共掺杂玻璃的上转换均低于单掺Er^3 玻璃。用250mW，波长为980nm的激光抽运3．5cm长的条形波导，在1536nm波段下得到的最大净增益是5dB，增益谱的半峰全宽是14nm。

Characterization of Ion Exchange Erbium-Doped Silica Glass Amplifiers

The growing interest for the use of integrated optical (IO) amplifiers in optical fiber telecom has led to deep search for ever better rare-earth-doped glassy materials. Some properties of a set of Er~(3+)/Yb~(3+)-doped silicate glasses 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 equal to (19 nm.) Measurements of the lifetime of the metastable state (()~4I_(13/2)) of Er~(3+) are performed upon excitation by laser pumps at 514.5 nm and 980 nm, and life time of the order of 7 ms are measured in most samples. The intensity of the up-conversion fluorescence is less in Er~(3+)/Yb~(3+) co-doped glasses than in Er~(3+)-doped ones. 5 dB net gain at the wavelength of 1536 nm has been obtained in a 3.5 cm long channel waveguide with (250 mW) pump power at 980 nm and the FWHM is 14 nm.