| http://www.w3.org/ns/prov#value | - The second path includes two cascaded optical modulators, MZM2 and MZM3, where MZM2 modulates the light at a first frequency, e.g. 18 Ghz, after which the light is amplified by an erbium doped fiber amplifier and then modulated a second time by MZM3 driven by RF In, producing wavelengths at an input fundamental frequency, e.g. 1550 nm, a first modulated fundamental frequency, e.g. ???18 Ghz, a fun
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