Recent research and development of optical fiber monitoring in communication systems

Toge, Kunihiro; Ito, Fumihiko

doi:10.1007/s13320-013-0127-2

Cited by 17 publications

(5 citation statements)

References 28 publications

(30 reference statements)

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“…Bending could be microbending or macro-bending. The micro-bends are caused by minor discontinuities or imperfections in fibers whereas, macro-bends occurs when fibers are physically bent beyond the point at which the critical angle is exceeded.. An OTDR is a valuable optoelectronic device used in the characterization and qualification of optical fibers [7]. Typical parameters measured with OTDR include; total fiber loss, loss per unit length, connector insertion, loss connector return loss (reflection), splice loss, inter-splice loss, absolute fiber length, evidence of macro/micro bending, and position of cable defects or breaks [8].…”

Section: Introductionmentioning

confidence: 99%

Optical Time Domain Reflectometer Assessment of Attenuation in Fiber Optics Communication System

Ilouno

Audu

2018

JERR

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Attenuation is an undesirable factor that weakens the strength of signal as it travels down fiber optics. Attenuation level in every fiber communication link must be kept at its tolerable range in order to maintain good signal transmission. When the level of attenuation in a link is higher than the acceptable tolerance value, the transmission suffers some setbacks such as loss of signal, freezing of signal etc. An optoelectronic device, Optical Time Domain Reflectometer (OTDR) was used in the measurement of attenuations in the single-mode fiber using the uni-directional technique. It is a convenient and powerful tool for rapidly assessing attenuation behavior in optical fibers. It combines a detector and laser source to provide an inside view of the fiber link described by a trace. The injected light pulse from the laser source is received at the detector. OTDR traces were produced in accordance with the light pulses received. From these traces, the attenuation levels for the different fiber cores were obtained. An average attenuation limit of 0.188 dB/km and average section loss of 0.3dB for 1550 nm wavelength window over the span length of 1597.35 m were achieved which are within the acceptable standard range of 0.20 dB/km to 0.30 dB/km.

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Section: Introductionmentioning

confidence: 99%

Optical Time Domain Reflectometer Assessment of Attenuation in Fiber Optics Communication System

Ilouno

Audu

2018

JERR

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“…With the widespread use of digital techniques in instrumentation and communication systems, full digital demodulation has become the current trend of fiber-optic Fabry-Perot sensor demodulation, which has the advantages of high speed, high precision, and good stability. However, the traditional full digital demodulation method still combines with large optical instruments [11][12][13][14]. This paper proposes a new demodulation algorithm based on the phase generated carrier (PGC) arc tangent function and the analysis of several mature demodulation methods.…”

Section: Introductionmentioning

confidence: 99%

An arc tangent function demodulation method of fiber-optic Fabry-Perot high-temperature pressure sensor

Ren

Hong

et al. 2017

Photonic Sens

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Abstract:A new demodulation algorithm of the fiber-optic Fabry-Perot cavity length based on the phase generated carrier (PGC) is proposed in this paper, which can be applied in the high-temperature pressure sensor. This new algorithm based on arc tangent function outputs two orthogonal signals by utilizing an optical system, which is designed based on the field-programmable gate array (FPGA) to overcome the range limit of the original PGC arc tangent function demodulation algorithm. The simulation and analysis are also carried on. According to the analysis of demodulation speed and precision, the simulation of different numbers of sampling points, and measurement results of the pressure sensor, the arc tangent function demodulation method has good demodulation results: 1 MHz processing speed of single data and less than 1% error showing practical feasibility in the fiber-optic Fabry-Perot cavity length demodulation of the Fabry-Perot high-temperature pressure sensor.

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“…Erbium doped fiber amplifier is an essential component for increasing capacity of transmission in long-way communication systems [1]. Although these amplifiers are more useful than others, un-flatness gain spectrum of amplified spontaneous emission (ASE) source around 1532 nm leads to decrement in capacity and bandwidth in wavelength division multiplexing (WDM) and dense wavelength division multiplexing (DWDM) systems.…”

Section: Introductionmentioning

confidence: 99%

Novelty design in gain flattening filter of ASE source based on fat ultra-long period fiber grating

et al. 2016

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Abstract:A new type of gain flattening filter for amplified spontaneous emission (ASE) source based on erbium doped fiber (EDF) is proposed and demonstrated by fabricating and writing two series ultra-long period fiber grating (ULPFG) on single mode fiber (SMF-28). The novelty method in this research is based on writing the two ULPFGs as fat gratings. The LPG is written by a simple and available arc-discharge method. The pump power based on single-pass backward pump configuration is around 100 mW, and the average wavelength is near to 974 nm. The gain flattening profile is obtained by 3.4 (±1.7) dB ripple in the wavelength range between 1524 nm and 1565 nm with 41-nm band width.

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Recent research and development of optical fiber monitoring in communication systems

Abstract: Recent progress on optical fiber monitoring in the optical communication systems is reviewed along with current optical fiber monitoring and diagnosing problems in deployed access, trunk and submarine communication systems.

Cited by 17 publications

References 28 publications

Optical Time Domain Reflectometer Assessment of Attenuation in Fiber Optics Communication System

Optical Time Domain Reflectometer Assessment of Attenuation in Fiber Optics Communication System

An arc tangent function demodulation method of fiber-optic Fabry-Perot high-temperature pressure sensor

Novelty design in gain flattening filter of ASE source based on fat ultra-long period fiber grating

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