O-band optical communication system with dispersion compensation

An O-band optical communication system, comprising:

• an optical fiber system having an input and an output, the optical fiber system comprising at least a first fiber segment coupled in series to a second fiber segment so that a first optical signal propagating from the input of the optical fiber system to the output of the optical fiber system passes through both the first fiber segment and the second fiber segment;
• wherein the first fiber segment has a positive dispersion-wavelength gradient and a first zero dispersion wavelength in the range 1295 nm-1330 nm,
• wherein the second fiber segment has a negative dispersion-wavelength gradient and a second zero dispersion wavelength in the range 1295 nm-1330 nm, different from the first zero dispersion wavelength,
• wherein when light of the first optical signal propagating along the first fiber segment has a wavelength shorter than the first zero dispersion wavelength and the second zero dispersion wavelength and experiences a first amount of negative dispersion, the first amount of negative dispersion is at least partially compensated by a first amount of positive dispersion arising from propagation along the second fiber segment, and
• wherein when light of the first optical signal propagating along the first fiber segment has a wavelength longer than the first zero dispersion wavelength and the second zero dispersion wavelength and experiences a second amount of positive dispersion, the second amount of positive dispersion is at least partially compensated by a second amount of negative dispersion arising from propagation along the second fiber segment.