Built-in test capable fiber optic transceiver application concept

The concept of built-in test (BIT) applied to aerospace platform fiber optics has been discussed for over three decades.^1-2 Today the practical realization of a digital fiber optic transceiver with transmitter signal strength indication (TSSI), receiver signal strength indication (RSSI), and in situ optical time domain reflectometry (OTDR), gives the aerospace industry a new point of departure to determine best ways to demonstrate and field fiber optic BIT on aerospace platforms.^3-5This paper describes key elements to consider when developing fiber optic BIT development test plans and operational concepts.