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Fig.6-2 Reflection Event
6.3.4 Non-reflection Event
Non-reflection event brings loss on the whole transmission link of optical fiber, but no light
reflection. On the curve, non-reflection event is shown as drop of optical power, as shown in
Fig.6-3.
Fig.6-3 Non-reflection Event
6.3.5 Event Inspection
OTDR sends optical pulse into the optical fiber that waited for inspection, then, begins to
accept the returned optical signal immediately, and calculate the distance of “event” in the
optical fiber. The further the event is, the longer the time for returning back to OTDR will be. The
distance can be calculated according to the time when receiving the event.
Through inspecting the curve of the reflected signal, the optical transmission characteristics
of optical fiber, connector and joint can be confirmed.
