EFFECT OF ATTENUATION ON LONG DISTANCE FIBER OPTICS COMMUNICATION LINKS

J Ilouno, T P Fom, M Oguche, N M Chagok

Abstract


One of the advantages offered by fiber optics over other cables is the ability to transmit signals over long distances.

However, when the maximum transmission distance is exceeded it results in significant loss of transmitted signal

which affects the quality of the communication network. In this paper, Optical Time Domain Reflectometer

(OTDR) was used to measure attenuation using 1550 nm wavelength window in SM 36 Core fiber optics cable

over various distances and the effect analyzed. The results obtained affirm the known facts from published

literatures i.e. as distance increases attenuation also increases and vice versa. However, some abnormalities were

also observed. For instance, in fiber Core-30, decreases in attenuation were observed at locations 24.6003,

30.6745, and 49.1674 km with average loss difference of 0.086 dB. Also, fiber core-36 had a decrease in

attenuation at location 61.3617 km with loss difference of 0.086 dB. These decreases in attenuation were due to

the effect of dreaded gainers (positive events with apparent losses). One of the ways of minimizing attenuation is

by feeding the fiber optics with enough signal power.

Keywords: Fiber Optics, Attenuation, OTDR, Dreaded Gainer


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