| 主权项 |
1. A system for optical communications, comprising:
a first optical communication module to output a first optical signal; an optical link optically coupled to the first optical communication module to receive and transmit the first optical signal; a second optical communication module optically coupled to the fiber to reflect the first optical signal back into the link towards the first optical communication module as a second optical signal to be received by the first optical communication module; and one or more optical amplifiers coupled between the first and second communication modules to amplify the second optical signal to maintain, at least on average, a power level for the second optical signal equal to the power level of the first optical signal, wherein the one or more optical amplifiers include a first optical amplifier coupled at a first location on the optical link, wherein the first location is determined based on maximizing an optical signal to noise ratio (OSNR) computed as the ratio of the power level of the second optical signal to an optical noise power comprising both a first Rayleigh backscattering noise generated at the first optical communication module and a second Rayleigh backscattering noise generated at the first optical amplifier. |
