Eight optical channels are to be distributed, centered on a free-space of 1.55 microns. Each channel is to carry a digital data stream with a bit rate of 40 GB/ s. To provide adequate crosstalk...

Eight optical channels are to be distributed, centered on a free-space of 1.55 microns. Each channel is to carry a digital data stream with a bit rate of 40 GB/ s. To provide adequate crosstalk immunity, the channels need to be spaced 200 GHz apart. Calculate the free-space wavelength separation between adjacent channels. Calculate the eight laser wavelengths needed to implement this system.