These seem to be ITU standards for pushing data thru optical fibers:
G.983: Broadband optical access systems based on Passive Optical Networks (PON) “This Recommendation describes characteristics of an Optical Access Network (OAN) with the capability of transporting various services between the user-network interface and the Service node interface.” G.983.1
G.984?,
G.652: Characteristics of a single-mode optical fibre cable. (too low),
G.671: Transmission characteristics of optical components and subsystems.
Optical interfaces for equipments and systems relating to the synchronous digital hierarchy,
Optical interfaces for multichannel systems with optical amplifiers.