An optical amplification system comprising:
- a demultiplexer configured to separate an initial optical signal into a first separated input optical signal, a second separated input optical signal, and a third separated input optical signal, wherein:
- the first separated input optical signal includes a first component that corresponds to a first wavelength range and a second component that corresponds to a fourth wavelength range,
- the second separated input optical signal corresponds to a second wavelength range between the first wavelength range and the fourth wavelength range, and
- the third separated input optical signal corresponds to a third wavelength range between the second wavelength range and the fourth wavelength range;
- a first optical amplifier comprising:
- a first pump source including a broadband laser configured to generate a first pumping beam, the first pumping beam having a first pumping wavelength range of 1330 nanometers (nm) to 1400 nm;
- and
- a first optical fiber doped with phosphorus configured to receive the first pumping beam and the first separated input optical signal, wherein the first pumping beam and the first optical fiber cause Raman amplification to the first component and the first pumping beam and the first optical fiber are configured to cause Raman amplification to the second component, such that the first component of the first separated input optical signal and the second component of the first separated input optical signal are amplified by the first pumping beam and the first optical fiber to produce a first amplified optical signal that includes the first component as amplified and the second component as amplified;
- a second amplifier comprising:
- a second pump source including a first narrowband laser configured to generate a second pumping beam corresponding to a second pumping wavelength range;
- and
- a second optical fiber doped with a first element and configured to receive the second pumping beam and the second separated input optical signal, wherein the second pumping beam and the second optical fiber are configured to cause amplification of the second wavelength range to produce a second amplified optical signal out of the second separated input optical signal;
- a third amplifier comprising:
- a third pump source including a second narrowband laser configured to generate a third pumping beam having a third pumping wavelength range;
- and
- a third optical fiber doped with a second element and configured to receive the third pumping beam and the third separated input optical signal, wherein the third pumping beam and the third optical fiber are configured to cause amplification of the third wavelength range to produce a third amplified optical signal out of the third separated input optical signal;
- and
- a multiplexer configured to combine the first amplified optical signal, the second amplified optical signal, and the third amplified optical signal.