Chromatic dispersion monitoring method based on semiconductor optical amplifier spectral shift in &lt;inline-formula&gt;&lt;math altimg="none" display="inline" overflow="scroll"&gt;&lt;mrow&gt;&lt;mn&gt;40&lt;/mn&gt;&lt;mspace width="0.3em" /&gt;&lt;mi&gt;Gbit&lt;/mi&gt;&lt;mo&gt;∕&lt;/mo&gt;&lt;mi mathvariant="normal"&gt;s&lt;/mi&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/inline-formula&gt; optical communication systems
Optical engineering