kbps: Kilo bits per second 1,000 bps
Mbps: Mega bits per second 1,000,000 bps
Gbps: Giga bits per second 1,000,000,000 bps
Tbps: Tera bits per second 1,000,000,000,000 bps
Pbps: Peta bits per second 1,000,000,000,000,000 bps
Ebps: Exa bits per second 1,000,000,000,000,000,000 bps
Zbps: Zetta bits per second 1,000,000,000,000,000,000,000 bps
Ybps: Yotta bits per second 1,000,000,000,000,000,000,000,000 bps
With Wave Division Multiplexing (WDM), using different optical
wavelengths, the fiber bandwith can be increased by a factor of about 16.
"Narrowband dinosaurs" are deploying WDM since it is less expensive than
laying more fiber.
Dense Wave Division Multiplexing (DWDM) uses
high-Q laser photons with single lambda bandwidth, limited only by the
uncertainty principle discovered by Werner Heisenberg, allowing up to
10,000 adjacent channels within the amplifier gain!