Why is there no ultra-broadband Superluminescent Diode more than 100 nm?

Now there are many Superluminescent Diode with a 3dB bandwidth of about 100 nm on sale. And they also provide SLD modules with a 3dB bandwidth of about 400 nm, by combining 4 SLDs, which is much...

30 March 2017 8,940 4 View