SM G652D G657A1 MM 50/125 62.5/125 Tight Bare Fiber OTDR Launch
Cable
For installed spans, linking the OTDR to the span under test
requires a hybrid patch cord.
Most OTDRs have an internal ultra physical contact (UPC) spherical
polish,
but some reflection-sensitive systems use the angled physical
contact (APC) polish.
There are two methods of terminating a fiber.
The first method uses a bare-fiber adapter, whichconsists of a plug body that grips the fiber to be
tested. The design of the bare-fiber adapter is such that the fiber
can pass completely through the
adapter body and damage the optical port. Because of this, the
barefiber adapter must never be
connected directly to the OTDR.Instead, the adapter should be used
with a short patch cord and mating
adapter sleeve to isolate damage from the OTDR’s port.
The second method uses a pigtail with a reusable mechanical splice, which allows easy mating of
the fibers to be tested with the OTDR. The Norland reusable
mechanical splice has been used for
decades for testing bare fibers.
It features a glass body that internally holds and aligns two
fibers.
The splice is filledwith a refractive index matching fluid to
reduce reflections.
To make the connection, strip and cleave both of the fibers to be
tested,
then insert and center both into the mechanical splice to complete
the termination.
