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Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/2518

Title: Investigation of Optical Return Loss (Back-Reflection) in Optical Fiber Transmission Links
Authors: Ilouno, J.
Awoji, M.
Akeredolu, B. J.
Keywords: Optical Return Loss
Rayleigh scattering
Fresnel reflection
Issue Date: May-2018
Publisher: International Journal of Computer Science and Mobile Computing
Series/Report no.: Vol. 7;No. 5; Pp 61-69
Abstract: Optical Return Loss (ORL) is the total amount of light returned from an optical fiber relative to the injected light. ORL can adversely affect fiber optics systems which indirectly affects the quality of the fiber network. One of the effects of this loss (multiple reflections) contributes greatly to the noise levels at the optical detector. Optical Return Loss could be caused by intrinsic material scattering (Rayleigh scattering) and Fresnel reflection. This paper however, focuses on the investigation of ORL using an Optical Time Domain Reflectometer (OTDR) amongst Optical Continuous Wave Reflectometer (OCWR), Optical Low Coherence Reflectometer (OLCR), and Optical Frequency Domain Reflectometer (OFDR). The OTDR was able to establish the ORL in every portion of the fiber under test. An ORL average level of 72.54 dB was obtained over span length of 2.86709 – 2.868.11 km. This is beyond the acceptable tolerance level (32 dB) of both the transmission and receiving equipment suggesting serious problem with the links. By implication, ORL can be used to determine the overall efficiency or performance of a fiber plant.
URI: http://hdl.handle.net/123456789/2518
ISSN: 2320–088X
Appears in Collections:Physics

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