Spectral bandwidth refers to the bandwidth of the spectrum, which can be measured using a spectral analyzer for LD and light-emitting diodes. When measuring the spectral width of the spectrum, special attention should be paid to the selection of the spectral analyzer system resolution. In principle, the resolution of the spectral analyzer should be less than 1/10 of the measured signal spectral width, and it is generally recommended to set it to at least 1/5 of the measured signal spectral width In actual measurements, in order to accurately measure data, a resolution bandwidth of less than 0.1nm is generally chosen. Resolution bandwidth RES is located at the top of the SETUP menu, and you can directly enter the size of the resolution bandwidth you want to set. When the resolution bandwidth chosen is different, the spectral shape observed from the spectral analyzer varies greatly, and the measured spectral width varies in size While observing the spectral width, the center frequency, bandwidth, peak power, and edge mode suppression ratio of the spectrum can also be read out through a spectral analyzer. At the same time, the menu can be launched and marked accordingly to facilitate the measurement of the required parameter values for testing
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