Page "Dark fibre" Paragraph 15

According to Gerry Butters, the former head of Lucent's Optical Networking Group at Bell Labs, Moore's law holds true with fibre optics.

The amount of data coming out of an optical fibre is doubling every nine months.

Thus, excluding the transmission equipment upgrades, the cost of transmitting a bit over an optical network decreases by half every nine months.

The availability of dense wavelength-division multiplexing DWDM and coarse wavelength division multiplexing CWDM is rapidly bringing down the cost of networking, and further progress seems assured.