scholarly journals Modeling of single mode optical fiber having a complicated refractive index profile by using modified scalar finite element method

2016 ◽  
Vol 48 (7) ◽  
Author(s):  
Sanjeev Kumar Raghuwanshi ◽  
B. M. Azizur Rahman
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Refractive Index ◽  
Optical Fiber ◽  
Single Mode ◽  
Refractive Index Profile ◽  
Index Profile ◽  
Single Mode Optical Fiber ◽  
Element Method

Reconstruction of refractive index profile of optical waveguides by the finite element method

2004 ◽  
Author(s):  
Sigifredo Solano G. ◽  
Catalina A. Ramirez ◽  
Javier Morales ◽  
Pedro I. Torres ◽  
Nicolas A. Gomez Montoya
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Refractive Index ◽  
Optical Waveguides ◽  
Refractive Index Profile ◽  
The Finite Element Method ◽  
Index Profile ◽  
Element Method

scholarly journals Strain and Curvature Stability Enhanced SMF Introduction

2017 ◽  
Vol 6 (1) ◽  
pp. 63
Author(s):  
S. Makouei
Keyword(s):  
Refractive Index ◽  
Optical Fiber ◽  
Design Method ◽  
Single Mode ◽  
Effective Area ◽  
Refractive Index Profile ◽  
Curvature Radius ◽  
Geometrical Parameters ◽  
Small Curvature ◽  
Bending Loss

In this paper, the strain insensitive single mode optical fiber with low nonlinear effects and ultra low bending loss (BL), appropriate for small curvature radius installation, is presented. The suggested design method is based on the reverse engineering which evaluates the refractive index profile considering proper mode field diameter (MFD) value. Then, so as to attain the desired bending loss and strain response for the optical fiber, the optimization tool of the evolutionary genetic algorithm (GA) is employed to determine the optical and geometrical parameters of the structure. In the first designed fiber, the calculations for BL, MFD, effective area (Aeff), and effective refractive index (neff) sensitivity to strain in the well-known wavelength of 1.55 µm are 0.0018 dB per each turn of 5 mm curvature radius, 8.53 µm, 58 µm2, and 4.5 × 10-8 µɛ-1, respectively. Furthermore, the effect of placing raised outer cladding in the fiber structure is investigated which exhibits the MFD of 8.63 µm, 0.0093 dB BL for single turn of 5 mm radius, and 87 µm2 Aeff at 1.55 µm. In this case the strain sensitivity of 6.7 × 10-8 µɛ-1 is calculated for the neff. The mentioned effective area is magnificently large in the domain of bend insensitive fibers. In the meantime, the designed structures are insensitive to strain which is a crucial feature in applications with small curvature radius.

scholarly journals Stress Analysis of Polarization Maintaining Optical Fibers by the Finite Element Method

1970 ◽  
Vol 1 (1) ◽  
Author(s):  
M. H. Aly A. S. Farahat, M. S. Helmi and M. Farhoud
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Optical Fibers ◽  
Radial Distance ◽  
Single Mode ◽  
The Finite Element Method ◽  
Modal Birefringence ◽  
Polarization Maintaining ◽  
External Forces ◽  
Element Method

Stress-induced birefringence in single mode polarization maintaining optical fibers has been investigated using the finite element method. The modal birefringence caused by external forces in the Panda and the Side Tunnel fibers are calculated. It is found that the modal birefringence is directly proportional to the radial distance from the fiber center. As expected, the modal birefringence vanishes with the variation in the magnitude of the applied external loads.Key Words: Birefringence, Polarization, Panda Fiber, Side-Pit Fiber, Finite Element Method.

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