  The number of mobile users is increasing rapidly, 3GPP initiated a new
technology 4G Long Term Evolution (LTE). LTE is an enabling technology as a
solution to the problem of network capacity and quality in areas that have a
high demand like Sleman. The quality of LTE networks are supported by backbone
and distribution network. This paper describes the designing of fiber optic
network as the LTE backbone network in Sleman. The backbone network requires
G-652 optical cable along 85 km with a ring topology and WDM-STM64 technology.
The distribution network uses GPON technology and the type of G984 optical
cable along 61.35 km. The minimum of power received at the end-point in the
optisystem simulation is -25 dBm and -26 dBm through the calculation. This
value is acceptable, since it is above the minimum of power received (Receiver
Sensitivity) -28 dBm which refers to the standard parameters of G.984.2. The
average value of rise time is 69 ps, this value is still below the maximum
allowable value of rise time 70 ps. Average BER of backbone link is 5x10-4.
