Propagation constant of single-mode fibers measured from the mode-field radius and from the bending loss

1989 ◽  
Vol 7 (2) ◽  
pp. 225-228 ◽  
Author(s):  
W. Freude ◽  
E.K. Sharma ◽  
A. Sharma
Keyword(s):  
Propagation Constant ◽  
Single Mode ◽  
Mode Field ◽  
Bending Loss

Bending loss evaluation of single-mode fibers based on the mode field measurements

1988 ◽  
Author(s):  
M. MIYAMOTO ◽  
T. SAKAI ◽  
K. NISHIDE ◽  
R. YAMAUCHI ◽  
K. INADA
Keyword(s):  
Field Measurements ◽  
Single Mode ◽  
Mode Field ◽  
Bending Loss

Mode field diameter measurement conditions in single-mode fibres

1989 ◽  
Vol 25 (8) ◽  
pp. 493
Author(s):  
M. Ohashi ◽  
N. Shibata ◽  
K. Sato
Keyword(s):  
Single Mode ◽  
Diameter Measurement ◽  
Mode Field ◽  
Mode Field Diameter

Microstructured single-mode IR fibers based on metal halides with increased mode-field diameter

2021 ◽  
Vol 88 (8) ◽  
pp. 469
Author(s):  
A. S. Korsakov ◽  
A. A. Yuzhakova ◽  
D. D. Salimgareev ◽  
E. A. Korsakova ◽  
A. E. Lvov ◽  
...  
Keyword(s):  
Single Mode ◽  
Metal Halides ◽  
Mode Field ◽  
Mode Field Diameter

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.

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