scholarly journals Study of Optical Fiber Design Parameters in Fiber Optics Communications

2017 ◽  
Vol 2 (3) ◽  
pp. 302-308 ◽  
Author(s):  
Salim Qadir Mohammed ◽  
Asaad M. Asaad M. Al-Hindawi
Keyword(s):  
Optical Fiber ◽  
Fiber Optics ◽  
Numerical Aperture ◽  
Design Parameters ◽  
Light Sources ◽  
Long Distance ◽  
Graded Index ◽  
Large Bandwidth ◽  
Telecommunication Infrastructure ◽  
Distance Communication

Fiber optics is an important part in the telecommunication infrastructure. Large bandwidth and low attenuation are features for the fiber optics to provide gigabit transmission. Nowadays, fiber optics are used widely in long distance communication and networking to provide the required information traffic for multimedia applications. In this paper, the optical fiber structure and the operation mechanism for multimode and single modes are analyzed. The design parameters such as core radius, numerical aperture, attenuation, dispersion and information capacity for step index and graded index fibers are studied, calculated and compared for different light sources.

scholarly journals Manifestation of propagation traits for polymer square lattice micro-structured optical fiber in THz regime: a simplified model

2021 ◽  
Author(s):  
Hukam Singh ◽  
Dinesh Kumar Sharma ◽  
Saurabh Mani Tripathi
Keyword(s):  
Optical Fiber ◽  
Numerical Aperture ◽  
Relative Sensitivity ◽  
Sensitivity Coefficient ◽  
Spot Size ◽  
Square Lattice ◽  
Confinement Loss ◽  
Design Parameters ◽  
Solid Core ◽  
Material Loss

Abstract To sustain the pace with immense prominence, interest in low-loss terahertz (THz) waveguides increases due to their particular applications in the multidisciplinary arena. This paper narrates a novel solid-core polymer-based square lattice micro-structured optical fiber (SL-MOF) with circular air-holes for efficient propagation of THz waves. The anticipated model’s guiding attributes are described by employing the numerically efficient finite-element method (FEM) in conjunction with an auxiliary Ring Model. Numerical analysis of the model exhibits confinement loss of about ~ 10 -7 dB/cm and low effective material loss of ~ 0.19 cm -1 at the applied frequency of 1.0 THz. It is also demonstrated that the considered geometry furnishes low bending loss over the extended range of THz frequency. The relative sensitivity coefficient is evaluated in context for the targeted design parameters to enable the said model’s practical utility. Other nameworthy propagation characteristics, such as effective mode-index, power fraction, effective mode-area, numerical aperture, spot-size, and the beam divergence are also investigated. The improved outcomes are anticipated that the proposed configuration will be opened a new epoch in the THz waveband.

scholarly journals Furtherance in Splicing Technique of Optical Fiber Communication

2020 ◽  
Vol 9 (3) ◽  
pp. 3505-3609
Keyword(s):  
Optical Fiber ◽  
Optical Fibers ◽  
High Speed ◽  
Single Mode ◽  
Optical Fiber Communication ◽  
Communication Line ◽  
Long Distance ◽  
Fiber Communication ◽  
Splice Loss ◽  
Distance Communication

The improvement in technology over long distance communication using optical fiber has been regulated over past few decades, and it took drastic enhancement in one of the major parameter for joining two OFC cable (splicing). The different experiments performed in order to bring about the result that can give nearly 0dB splice loss when there is shifting of entire set up of Optical Fiber Communication. The splicing loss is created by the joining of two SMF using fiber optic fusion splicing. The objective of this paper is to determine the low splice loss in joining two single mode or multimode optical fiber, such that long distance communication that required multiple infrastructure assembly for its operational unit can be made relocatable as there is large investment and material and electronic circuitry is associated to it. Therefore to reduce that cost we have sets of analysis that splicing loss can be reduced to 0dB for SMFSMF end face connection or at least no improvement in splice losses while relocation of OFC infrastructure from one place to other place as the result of the tested experiment. Based on experiment conducted we came to conclusion that with essential requirements for establishing a low-loss and high-speed communication line using optical fibers, the need for quality of splicing technology along with perfect core alignment angle is required to reduce splice loss, such that the infrastructure can be shifted to many different location without any additional cost of new material and new resources. The exact measurement of splice loss can be insured by another set of formula which we came across during the experimental performance.

J044024 Effects of EB irradiation on tensile strength of optical fiber for long distance communication line

2011 ◽  
Vol 2011 (0) ◽  
pp. _J044024-1-_J044024-4
Author(s):  
Hidenori Kawazu ◽  
Yuu Nakahara ◽  
Hiroaki TAKEI ◽  
Akira TONEGAWA ◽  
Yoshitake NISHI
Keyword(s):  
Tensile Strength ◽  
Optical Fiber ◽  
Communication Line ◽  
Long Distance ◽  
Distance Communication

Simulation Of Soliton Amplification In Micro Ring Resonator For Optical Communication

2012 ◽  
Author(s):  
A. Afroozeh ◽  
I. S. Amiri ◽  
M. Bahadoran ◽  
J. Ali ◽  
P. P. Yupapin
Keyword(s):  
Ring Resonator ◽  
Dark Soliton ◽  
Input Power ◽  
Bright Soliton ◽  
Long Distance ◽  
Optical Signals ◽  
Large Bandwidth ◽  
Power Amplification ◽  
Distance Communication ◽  
Soliton Amplification

A system consisting of a series of micro ring resonator (MRR) is proposed. Optical dark and bright soliton pulses propagating through the nonlinear waveguides are amplified. This system can be used in long distance communication system. The dark and bright soliton is input into the designed system. The nonlinear effect contributes to segregation of continuous soliton pulse into smaller pulses. In this way large bandwidth of optical signals can be obtained. The power amplification occurs when the soliton propagates along the MRRs systems. In this research the concern is the generation of amplified pulse of optical dark and bright soliton while propagating in the MRR device. Simulated results show the amplification of bright soliton in which the input power increases from 0.6 W to 10.9331 W and 7.684 W at the trapped wavelength of 1520.428 nm and 1519.912 nm respectively. Key words: Optical soliton; dark soliton; bright soliton; soliton amplification

scholarly journals Experimental Analysis of Cable Distance Effect on Signal Attenuation in Single and Multimode Fiber Optics

2018 ◽  
Vol 8 (3) ◽  
pp. 1577
Author(s):  
Uzairue Stanley ◽  
Victor Matthews Olu ◽  
Charles Ochonogor ◽  
Amaize Peter ◽  
Anyasi Francis
Keyword(s):  
Fiber Optics ◽  
Distance Effect ◽  
Single Mode ◽  
Optical Amplifier ◽  
Single Mode Fiber ◽  
Base Station ◽  
Multimode Fiber ◽  
Drastic Reduction ◽  
Long Distance ◽  
Distance Communication

<div class="WordSection1"><p>Losses during transmission and high demand of high data rate by the end users have become the biggest challenges facing the telecommunication industries worldwide with Nigeria inclusive. Fiber optic cable as a channel of communication has been adapted worldwide in solving these problems but there is a little limitation in the place of multimode fiber in long distance communication. This paper focuses on the effect of changes in distance on transmitted bandwidth on single mode and multimode fiber. Two cases were considered during this research; (a) with optical amplifier placed in between multimode fiber and (b) without optical amplifier in between multimode fiber. Readings were taken at various distances when specific bandwidth ranging from 50Mbps to 500Mbps was transmitted from the base station to the various distances and it was observed that there was no significant changes in bandwidth received at specified distances (100, 200, 300, 400, 500 etc) m when using single mode fiber, there was a drastic reduction in bandwidth when it get to a distance of 300m when using multimode. When optical amplifier was placed in between the multimode fiber at some selected distances after 400m from the transmitting BTS, it was noticed that the drastic reduction in transmitted bandwidth was almost eliminated, thereby proven that multimode fiber can be use in long distance communication provided optical amplifiers are incorporated in between the distance to bust the signal strength.</p></div>

scholarly journals Kilometers Long Graphene-Coated Optical Fibers for Fast Thermal Sensing

Research ◽  
2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Yiyong Guo ◽  
Bing Han ◽  
Junting Du ◽  
Shanshan Cao ◽  
Hua Gao ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Fiber Optics ◽  
Optical Fibers ◽  
Rayleigh Scattering ◽  
Graphene Nanosheets ◽  
Pulse Generation ◽  
Thermal Imager ◽  
Long Distance ◽  
Fiber Sensing ◽  
Sensing Applications

The combination of optical fiber with graphene has greatly expanded the application regimes of fiber optics, from dynamic optical control and ultrafast pulse generation to high precision sensing. However, limited by fabrication, previous graphene-fiber samples are typically limited in the micrometer to centimeter scale, which cannot take the inherent advantage of optical fibers—long-distance optical transmission. Here, we demonstrate kilometers long graphene-coated optical fiber (GCF) based on industrial graphene nanosheets and coating technique. The GCF shows unusually high thermal diffusivity of 24.99 mm2 s-1 in the axial direction, measured by a thermal imager directly. This enables rapid thermooptical response both in optical fiber Bragg grating sensors at one point (18-fold faster than conventional fiber) and in long-distance distributed fiber sensing systems based on backward Rayleigh scattering in optical fiber (15-fold faster than conventional fiber). This work realizes the industrial-level graphene-fiber production and provides a novel platform for two-dimensional material-based optical fiber sensing applications.

scholarly journals Photonic crystal fiber metalens

Nanophotonics ◽  
2019 ◽  
Vol 8 (3) ◽  
pp. 443-449 ◽  
Author(s):  
Jingyi Yang ◽  
Indra Ghimire ◽  
Pin Chieh Wu ◽  
Sudip Gurung ◽  
Catherine Arndt ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Optical Fiber ◽  
Numerical Aperture ◽  
Spot Size ◽  
Long Distance ◽  
Silica Glasses ◽  
Crystal Fiber ◽  
Novel Technology ◽  
Fiber Materials ◽  
Novel Applications

AbstractConventional optical fiber has excellent performance in guiding light, which has been widely employed for long-distance optical communication. Although the optical fiber is efficient for transmitting light, its functionality is limited by the dielectric properties of the core’s and cladding’s materials (e.g. Ge-doped-silica and silica glasses). The spot size of the transmitted light is diverging and restricted by the diffraction limit of the dielectric core, and the numerical aperture is determined by the refractive index of the fiber materials. However, the novel technology of metasurfaces is opening the door to a variety of optical fiber innovations. Here, we report an ultrathin optical metalens directly patterned on the facet of a photonic crystal optical fiber that enables light focusing in the telecommunication regime. In-fiber metalenses with focal lengths of 28 μm and 40 μm at a wavelength of 1550 nm are demonstrated with maximum enhanced optical intensity as large as 234%. The ultrathin optical fiber metalens may find novel applications in optical imaging, sensing, and fiber laser designs.

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