Comparative Study of Triple-Clad Dispersion-Shifted, Dispersion-Flattened and Dispersion-Compensated Fiber for Broadband Optical Network Application

2016 ◽  
Vol 37 (2) ◽  
Author(s):  
Vikram Palodiya ◽  
Sanjeev Kumar Raghuwanshi
Keyword(s):  
Refractive Index ◽  
Comparative Study ◽  
Optical Fibers ◽  
Propagation Constant ◽  
Optical Network ◽  
Optical Characteristics ◽  
Match Method ◽  
Cylindrical Structure ◽  
Different Types ◽  
Network Application

AbstractIn this paper, comprehensive analyses of triple-clad fibers are presented. The geometry of multiple-clad fibers has been considered as a four-layer cylindrical structure. The geometry consists of a core and three claddings. We have analyzed and compared different types of triple-clad refractive index profiles on the basis of dispersion, mode distribution and propagation constant. To enhance the optical characteristics of these three fibers, we have developed a combined formulation which is applicable for single-clad, double clad and triple-clad optical fibers. In optical fibers, two or more claddings are required for dispersion shifting, dispersion flattening and other specialized applications. Thus, an analysis of design dispersion-shifted, dispersion-flattened and dispersion-compensated fibers is presented. We have used a boundary match method for evaluating propagation wave vectors and guided modes.

scholarly journals Comparative study of solution concentration variations for polymer optical fibers sensor

2020 ◽  
Vol 16 (2) ◽  
pp. 140-144
Author(s):  
Hazura Haroon ◽  
Muhamad Naeem Mohd Nazri ◽  
Siti Khadijah Idris ◽  
Hanim Abdul Razak ◽  
Anis Suhaila Mohd Zain ◽  
...  
Keyword(s):  
Refractive Index ◽  
Comparative Study ◽  
Output Power ◽  
Optical Fibers ◽  
Refractive Index Change ◽  
Solution Concentration ◽  
High Refractive Index ◽  
Fiber Optic Sensors ◽  
Polymer Optical Fibers ◽  
Set Up

In this paper, we report a comparative study of fiber optic sensors for the application of aqueous solutions concentration monitoring. A simple, economical, and efficient set-up for liquid concentration measurement system was developed using polymer optical fibers (POFs). Cornstarch, sucrose, and salt solutions with different concentrations were tested, and the output power and the refractive index obtained were compared. The sensitivity of the sensor is found ranging from 0.938 μW/ RIU to 96.9 μW/RIU in term of refractive index change and 0.04298 μW/molL-1 to 0.097 μW/molL-1 in terms of concentration. It has been found that the concentration is proportionally related to its refractive index where high refractive index will experience greater loss since the light rays tend to be refracted out of the fiber instead of being internally reflected. The experimental results also show that as the solution’s concentration increases, the output power decreases.

scholarly journals Novel Empirical Correlation Between the Optical Refractive Index and Energy Bandgap in Semiconductors: Comparative Study

2021 ◽  
Author(s):  
Hosam Mohamed Gomaa ◽  
I.S. Yahia ◽  
H.Y. Zahran
Keyword(s):  
Experimental Data ◽  
Refractive Index ◽  
Comparative Study ◽  
Optical Band Gap ◽  
Energy Gap ◽  
Theoretical Studies ◽  
Oxide Glasses ◽  
High Agreement ◽  
Different Types ◽  
Number Of Publications

Abstract This work is an attempt to review some of the most famous and important studies to correlate the optical-linear refractive index of a substance to its energy band-gap.The refractive index of different types of materials, like semiconductors, insulators, oxides, thin-films, and oxide glasses, has been reported in a large number of publications in attempts to the estimation of how it can be correlated to the optical band-gap. The present work can be considered as a comparative study between the most successful relations in correlating the refractive index to the energy gap. The careful reviewing of the previous studies to correlate the optical refractive index and energy gap led to concluded that Reddy and Ahmmed approximation was selected to develop a new realized form that can give a good fit to the experimental data and, hence, be used directly as an accurate formula in the theoretical studies. The obtained formula correlates the optical refractive index to the energy gap and the oxygen atom's electronegativity. Such relation has been used to calculate the refractive indices for more than 96 materials (elements/compounds) with a high agreement with the experimental data.

A Comparative Study of Performances Between the WDM PON System and the CWDM PON System in an Optical Access Network

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Cheikh Kherici ◽  
Malika Kandouci
Keyword(s):  
Comparative Study ◽  
Optical Fibers ◽  
Optical Network ◽  
Access Network ◽  
High Capacity ◽  
Single Mode ◽  
Passive Optical Network ◽  
Power Budget ◽  
Water Vapor Absorption ◽  
Wdm Pon

AbstractThe growth of optical technology is currently being studied extensively to meet the significant demand for bandwidth. The passive optical network (PON) solves the problem of bandwidth as it extends the optical network to individuals and businesses [Sifta R, Munster P, Krajsa O, Filka M, “Simulation of bidirectional traffic in WDM-PON networks", Brno University of Technology, ISSN 0033–2097, R. 90 NR 1/2014.]. In this paper, a comparative study is made between the WDM PON system and the CWDM PON system using two different architectures, one for the WDM PON and the other for the CWDM PON, to illustrate the appropriate technique for the PON network by increasing the Q factor and the OSNR ratio while minimizing the bit error rate (BER < 10–9). Both systems are simulated at 10 Gbps for four users of bidirectional SMF (Single Mode Fiber) fiber lengths and different powers. In order to determine the transmission performance for both systems, the link was designed for fiber lengths of 20, 30, 40, 50 and 60 km as well as for powers from −10 dBm up to 10 dBm for four users. The use of the EDFA amplifier in the WDM PON system is required in this document to minimize degradation caused by attenuation [Parkirti RDK, Singh R. Cost-efficient Colorless WDM-PON Based on RSOA for High Capacity. Int J Adv Res Comput Eng Technol (IJARCET). 2016;5]. On the contrary, in the CWDM PON system, the amplification is not essential because the wavelengths used in this system are not affected by the water peak which causes a strong attenuation of the wavelengths in the 1370–1410 nm range on optical fibers [Nazir M, Arshad F, Asif R. Design and evaluation of power budget for a bidirectional CWDM-Passive Optical Network. In: International Conference on Communication, Computing and Digital Systems (C-CODE), Islamabad, Pakistan, 04 May 2017.]. The peak of water vapor absorption is close to 1383 nm.

scholarly journals Influence of Temperature and Pressure on Dispersion Properties of Nonlinear Single Mode Optical Fibers

1970 ◽  
Vol 4 (2) ◽  
Author(s):  
Mostafa H. Ali, Ahmed E. Elsamahy, Maher A. Farhoud and Taymour A. Hamdalla
Keyword(s):  
Refractive Index ◽  
Optical Fibers ◽  
Propagation Constant ◽  
Error Function ◽  
Near Field ◽  
Single Mode ◽  
Computer Code ◽  
Graded Index ◽  
Runge Kutta Method ◽  
Delay Factor

Near field distribution, propagation constant and dispersion characteristics of nonlinear single-mode optical fibers have been investigated. Shooting-method technique is used and implemented into a computer code for both profiles of step-index and graded-index fibers. An error function is defined to estimate the discrepancy between the expected electric-field radial derivative at the core-cladding interface and that obtained by numerically integrating the wave equation through the use of Runge-Kutta method. All of the above calculations done under the ocean depth in which the depth will affect the refractive index that have a direct effect on all the optical fiber parameters.KeyWords: Nonlinear refractive index, Normalized propagation constant, Mode delay factor, Material dispersion, Waveguide dispersion.

scholarly journals Fast and Simple Method for Evaluation of Polarization Correction to Propagation Constant of Arbitrary Order Guided Modes in Optical Fibers with Arbitrary Refractive Index Profile

2015 ◽  
Vol 2015 ◽  
pp. 1-11 ◽  
Author(s):  
Anton Bourdine
Keyword(s):  
Refractive Index ◽  
Optical Fibers ◽  
Arbitrary Order ◽  
Propagation Constant ◽  
Refractive Index Profile ◽  
Computational Error ◽  
Index Profile ◽  
Simple Method ◽  
Polarization Correction ◽  
Guided Modes

This work presents fast and simple method for evaluation of polarization correction to scalar propagation constant of arbitrary order guided modes propagating over weakly guiding optical fibers. Proposed solution is based on earlier on developed modified Gaussian approximation extended for analysis of weakly guiding optical fibers with arbitrary refractive index profile in the core region bounded by single solid outer cladding. Some results are presented that illustrate the decreasing of computational error during the estimation of propagation constant when polarization corrections are taken into account. Analytical expressions for the first and second derivatives of polarization correction are derived and presented.

scholarly journals Bacterial contamination control mats: a comparative study

1977 ◽  
Vol 79 (1) ◽  
pp. 133-140 ◽  
Author(s):  
H. M. Meddick
Keyword(s):  
Comparative Study ◽  
Working Conditions ◽  
Bacterial Contamination ◽  
Contamination Control ◽  
Different Types

SUMMARYThe ability of six different types of contamination control mats currently in use at the entrances to theatre suites and other clean areas to remove bacteria-carrying particles from theatre trolley wheels was compared. Marked differences in the effectiveness of this property were obtained; and all mats showed some disadvantages. Modification of one of the mats has resulted in improved efficiency under working conditions.

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