Telecommunications network

A telecommunications network comprising:

• a central node comprising:
• a first optical source configured to produce a first optical signal at a first wavelength;
• a first optical stabilizer configured to stabilize the first optical signal,
• a communications interface connectable to an optical network, and
• a first splitting unit configured to direct the first optical signal into a first path for the first optical signal and second path for the first optical signal, wherein the first path for the first optical signal is connected to the first optical stabilizer and the second path for the first optical signal is connected to the communications interface so as to provide the stabilized first optical signal to the optical network for distribution to each of the plurality of distributed nodes;
• and
• a plurality of distributed nodes configured to use the stabilized first optical signal at a second wavelength, each distributed node comprising:
• a wavelength converter configured to convert the stabilized first optical signal from the first wavelength to the second wavelength,
• wherein the second wavelength has a lower transmission loss than the first wavelength.

A system comprising:

• at least one processor and memory configured to, in a telecommunications network including a central node, an optical network and a plurality of distributed nodes, cause:
• at the central node, producing a first optical signal at a first wavelength;
• at the central node, directing the first optical signal into a first path for the first optical signal and a second path for the first optical signal, wherein the first path for the first optical signal is connected to a first optical stabilizer to stabilize the first optical signal produced by the central node, and the second path for the first optical signal provides the stabilized first optical signal to the optical network for distribution to each of the plurality of distributed nodes;
• at each of the plurality of distributed nodes, converting the stabilized first optical signal from the first wavelength to a second wavelength;
• and
• at each of the plurality of distributed nodes, using the stabilized first optical signal at the second wavelength, wherein the first wavelength has a lower transmission loss than the second wavelength.