Bending loss of a single-mode triangular-index fiber with a depressed cladding ring by a vector mode method

1993 ◽  
Author(s):  
Philippe G. Allard ◽  
Gar L. Yip
Keyword(s):  
Single Mode ◽  
Bending Loss ◽  
Vector Mode ◽  
Mode 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.

Low-noise blue light generation of intracavity frequency-doubled LD-pumped Cr:LiSAF laser by single-mode method

2001 ◽  
Vol 138 (1) ◽  
pp. 49-55 ◽  
Author(s):  
Satoshi Makio ◽  
Hironari Matsumoto ◽  
Akio Miyamoto ◽  
Masayoshi Sato ◽  
Takatomo Sasaki
Keyword(s):  
Blue Light ◽  
Single Mode ◽  
Low Noise ◽  
Intracavity Frequency ◽  
Mode Method ◽  
Light Generation

scholarly journals A Single and Double Mode Approach to Chaotic Vibrations of a Cylindrical Shell with Large Deflection

2004 ◽  
Vol 11 (5-6) ◽  
pp. 533-546 ◽  
Author(s):  
Liming Dai ◽  
Qiang Han ◽  
Mingzhe Dong
Keyword(s):  
Cylindrical Shell ◽  
Large Deflection ◽  
Single Mode ◽  
Order Mode ◽  
Governing Equations ◽  
Chaotic Vibrations ◽  
Nonlinear Dynamic Equations ◽  
Different Types ◽  
Mode Method ◽  
Research Show

The chaotic vibrations of a cylindrical shell of large deflection subjected to two-dimensional exertions are studied in the present research. The dynamic nonlinear governing equations of the cylindrical shell are derived on the basis of single and double mode models established. Two different types of nonlinear dynamic equations are obtained with varying dimensions and loading parameters. The criteria for chaos are determined via Melnikov function for the single mode model. The chaotic motion of the cylindrical shell is investigated and the comparison between the single and double mode models is carried out. Results of the research show that the single mode method usually used may lead to incorrect conclusions under certain conditions. Double mode or higher order mode methods should be used in these cases.

Bending loss resistance in single-mode fiber

1987 ◽  
Author(s):  
P. F. GLODIS ◽  
C. H. GARTSIDE ◽  
J. S. NOBLES ◽  
C. M. LESHE
Keyword(s):  
Single Mode ◽  
Single Mode Fiber ◽  
Bending Loss ◽  
Loss Resistance

Bending loss evaluation of single-mode fibres with arbitrary core index profile by far-field pattern

1990 ◽  
Vol 8 (5) ◽  
pp. 673-677 ◽  
Author(s):  
M. Miyamoto ◽  
T. Sakai ◽  
R. Yamauchi ◽  
K. Inada
Keyword(s):  
Single Mode ◽  
Field Pattern ◽  
Far Field ◽  
Index Profile ◽  
Bending Loss ◽  
Far Field Pattern

Low-bending loss and single-mode operation in few-mode optical fiber

2016 ◽  
Author(s):  
Ping Yin ◽  
Hua Wang ◽  
Ming-Yang Chen ◽  
Jin Wei ◽  
Zhi-Min Cai ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Single Mode ◽  
Single Mode Operation ◽  
Mode Operation ◽  
Bending Loss

Investigation of bending loss in a single-mode optical fibre

Pramana ◽  
2010 ◽  
Vol 74 (4) ◽  
pp. 591-603 ◽  
Author(s):  
A. Zendehnam ◽  
M. Mirzaei ◽  
A. Farashiani ◽  
L. Horabadi Farahani
Keyword(s):  
Optical Fibre ◽  
Single Mode ◽  
Bending Loss
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