Abstract
Problem statement: This study presents fiber fault monitoring approaches for Fiber-to-the Home (FTTH) with a Passive Optical Network (PON). Current fiber fault monitoring approaches are difficult to be implemented due to its complexity and high loss as the amount of branches increase. Approach: A fiber fault monitoring scheme is proposed whereas Fiber Bragg Grating (FBG) is placed on each branch of the Optical Network Unit (ONU). The advantages of the scheme are that it is simple, low cost and efficient in monitoring fiber fault in ONU. FTTH based network design is simulated using Optisystemtem 8.0 in order to investigate the feasibility of the proposed scheme. Results: The reflection spectrum of Fiber Bragg Gratings (FBGs) with different spectrum shape, frequencies and amplitude is used to differentiate each optical network. The simulation result shows that the unique characteristic of fiber Bragg grating is able to distinguish each optical network for a 20 km Passive Optical Network (PON) system. Conclusion: This study suggests the implementation of Fiber Bragg Grating that is placed in each network instead of using Optical Time Domain Reflectometer (OTDR) for fiber fault monitoring.
Highlights
Passive Optical Network (PON) monitoring is very important in order to reduce the operational expense
A conventional Optical Time Domain Reflectometer (OTDR) which operates at single wavelength is not able to detect branches beyond the wavelength selective component of the Remote Node (RN) of a Wavelength Division Multiplexing (WDM)-PON (Yuksel et al, 2008)
A lot of fiber fault locations have been conducted for branched optical fibers of PONs (Sankawa et al, 1990; Tanaka et al, 1996; Caviglia et al, 1999; Schmuck et al, 2006; Mulder et al, 2007)
Summary
Passive Optical Network (PON) monitoring is very important in order to reduce the operational expense. The unique reflection spectrum from be lost in the transmission (Li et al, 2006) This Fiber Bragg Grating (FBG) that is located in each problem is one of the problems of fiber monitoring Optical Network Unit (ONU) is manipulated in order to system using OTDR architecture. FBG consists of a structured PONs causes several disadvantages such as periodic modulation of the refractive index in the core lack of dynamic range to observe the equipments after of a single-mode optical fiber. The unique reflection the splitter, lengthy measurement time to achieve signal spectrum of FBG will distinguish the Optical suitable OTDR trace and repetition of the Network Unit (ONU). The simplest fiber Bragg grating measurement on various ONTs and the reflection of consists of a periodic modulation of the refractive index the dead zone that makes it impractical to distinguish in the core of single-mode optical fiber. The values of the grating period vary in order of the Bragg grating center wavelength and its amplitude
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