Multi-protocol optical device

A method comprising:

• emitting, during a first mode and by a first optical source, a first optical signal to a first input of a first optical modulator and to a second input of a second optical modulator;
• producing, during the first mode and by the first optical modulator, a first modulated optical signal at a first output of the first optical modulator;
• producing, during the first mode and by the second optical modulator, a second modulated optical signal at a second output of the second optical modulator;
• emitting, during a second mode and by a second optical source, a second optical signal to a third input of the second optical modulator;
• and
• producing, during the second mode and by the second optical modulator, a third modulated optical signal at a third output of the second optical modulator.

An apparatus comprising:

• a memory;
• and
• a processor communicatively coupled to the memory, the processor configured to:
• transition to a first mode during which (i) a first optical modulator produces a first modulated optical signal based on a first optical signal from a first optical source and (ii) a second optical modulator produces a second modulated optical signal based on the first optical signal;
• and
• transition to a second mode during which the second optical modulator produces a third modulated optical signal based on a second optical signal from a second optical source.