osnr 中文意思是什麼
osnr
解釋
光信噪比-
Raman fiber amplifier （ rfa ） is a kind of optical amplifier that can amplify signal light directly through nonlinear interaction of high intensity pump and signal light in fiber. whereas the spectrum of raman gain coefficient of optical fiber is not flat, the gain of signal light with different wavelength induced by a single pump is rather different, when wavelength division multiplexing ( wdm ) signal light is amplified by a single pump, the gain spectrum of the wdm signal light is not flat. the flatness of the wdm signal light has important impact on the optical signal - to - noise ratio ( osnr )
拉曼光纖放大器（ ramanfiberamplifier ，簡稱rfa ）利用高強度的泵浦光與信號光在光纖中的非線性相互作用實現信號光的直接放大，但是由於光纖的拉曼增益系數譜很不平坦，所以同一泵浦光源對不同波長信號光的增益就存在很大的差別，因此，用單泵浦光源來放大波分復用（ wavelengthdivisionmulti - plexing ，簡稱wdm ）信號光時，各信號光的增益值就有很大差異， wdm信號增益的平坦度對光信噪比（ opticalsignal - noiseratio ，簡稱osnr ）有重要影響。 -
Secondly, we simulate the transmission process in computer, calculate the optical - signal - to - noise - ratio ( osnr ) of output signal with the same input signal filtered by the ofbg, matched filter and f - p filter, analyze the improvement of the osnr after filtered by them. we find it also has advantage over f - p filter. taking the two reasons into account, we believe that the weak ofbg is superior to the widely used f - p filter
另外用計算機模擬計算了光信噪比的改善情況，研究發現：一個相同的噪聲信號經弱ofbg后的光信噪比較經過f - p濾波器后的光信噪比高，由此認為， ofbg用作光濾波器對接收端前置光放大器的噪聲進行濾波，比常用f - p光濾波器具有更大的優越性。
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