Patent ID: 7558480
Filing Date: 2009-07-07
Classification: G02B,H04B

Abstract:
1. An optical communications system comprising: an optical signal transmitter for generating an optical signal at an operating wavelength, wherein the signal is modulated at a bit rate of 10 Gb/s or higher; a receiver for receiving the optical signal; and, a repeaterless optical fiber link coupling the transmitter and the receiver, the link comprising an optical fiber span comprising an optical fiber having an optical fiber path length greater than 100 km, wherein said optical fiber link includes no optical amplifier(s) with electrical component(s) present in the location of said amplifier(s); wherein the system contains no external phase modulator driven at a frequency different than the bit rate; wherein the transmitter has an average output power greater than 6 dBm per channel and wherein said optical fiber link has no electrical component.