求助，找文章
不知道哪儿可以找到，我在IEEE的网站上看见了，但没有IEEE的会员进不去！Measuring Gain and Noise Figure of Erbium-Doped Fiber Amplifiers ...
DWDM optical amplifier noise figure measurement,” in Optical Ampli-. fiers and Their Applications, ser.
OSA Technical Digest, 1998, vol. 25,. pp. 120–124.
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