Patent ID: 8023827

Claim:
A system comprising: a first optical transceiver having a first set of transmitters including sixteen independent lasers and a first set of sixteen receivers, of the sixteen transmitters a first group of four emit a first wavelength (λ 1 ), a second group of four emit a second wavelength (λ 2 ), a third group of four emit a third wavelength (λ 3 ), and a fourth group of four emit a fourth wavelength (λ 4 ); and a second optical transceiver having a second set of transmitters including sixteen independent lasers coupled anti-symmetrically to the first set of sixteen receivers of the first optical transceiver and a second set of sixteen receivers coupled anti-symmetrically to the first set of sixteen transmitters of the first optical transceiver to provide sixteen channels, of the sixteen receivers a first group of four are sensitive to the first wavelength (λ 1 ), a second group of four are sensitive to the second wavelength (λ 2 ), a third group of four are sensitive to the third wavelength (λ 3 ), and the fourth group of four are sensitive to a fourth wavelength (λ 4 ), wherein all optical path lengths are equal.