Passive optical avionics network including optical repeater

The present disclosure is directed to a passive optical avionics network system and method. A avionics network system may comprise: (a) a passive optical network, the passive optical network comprising an optical repeater; and (b) an avionics module operably coupled to the passive optical network. An integrated modular avionics (IMA) system may comprise: (a) a line-replaceable unit (LRU), the LRU comprising: (i) a processing unit; and (ii) an optical line terminal (OLT); (b) an optical repeater; (c) at least one optical network unit (ONU); and an avionics module operably coupled to the at least one ONU. A method for avionics network communication may comprise: (a) receiving optical avionics data signals; (b) monitoring the optical avionics data signals for compliance with a communications protocol; and (c) regulating transmission of the optical avionics data signals according to compliance with the communications protocol.