scholarly journals Correlation and Power Distribution of Intercore Crosstalk Field Components of Polarization-Coupled Weakly Coupled Single-Mode Multicore Fibres

Photonics ◽  
2021 ◽  
Vol 8 (6) ◽  
pp. 191
Author(s):  
José A. P. Morgado ◽  
Adolfo V. T. Cartaxo
Keyword(s):  
Power Distribution ◽  
Communication Systems ◽  
Single Mode ◽  
Coupled Mode ◽  
Weakly Coupled ◽  
Wide Range ◽  
Optical Communication Systems ◽  
The Mean ◽  
Distribution Of Power ◽  
Linear Propagation

The correlation and power distribution of intercore crosstalk (ICXT) field components of weakly coupled multicore fibers (WC-MCFs) are important properties that determine the statistics of the ICXT and ultimately impact the performance of WC-MCF optical communication systems. Using intensive numerical simulation of the coupled mode equations describing ICXT of a single-mode WC-MCF with intracore birefringence and linear propagation, we assess the mean, correlation, and power distribution of the four ICXT field components of unmodulated polarization-coupled homogeneous and quasi-homogeneous WC-MCFs with a single interfering core in a wide range of birefringence conditions and power distribution among the field components at the interfering core input. It is shown that, for homogeneous and quasi-homogeneous WC-MCFs, zero mean uncorrelated ICXT field components with similar power levels are observed for birefringence correlation length and birefringence beat length in the ranges of 0.5m,10m and 0.1m,10m, respectively, regardless of the distribution of power between the four field components at the interfering core input.

Study on Coupling of Step and Graded Index Single Mode Optical Fiber Considering the Transverse Misalignment

2020 ◽  
Vol 8 (2) ◽  
pp. 78-82
Author(s):  
Prosenjit Roy Chowdhury ◽  
◽  
Keyword(s):  
Optical Fiber ◽  
Communication Systems ◽  
Structural Parameters ◽  
Fractional Power ◽  
Single Mode ◽  
Spot Size ◽  
Fiber Coupling ◽  
Fundamental Parameters ◽  
Graded Index ◽  
Wide Range

"Advance design and day to day up-gradation of communication system is the requirement of international telecommunication. The optical communication systems involve the effective fiber coupling or splicing to meet the need of long communication channel. When the studies on both the intensive and extensive properties of optical fiber are exploring new research horizons, the effectiveness of such systems can be calibrated with transmission parameters like transmitted fractional power, which is a function of ‘spot size’ as well. Our study of fiber junctions based on fundamental parameters like wavelength, fiber profile index etc. has touched some unrevealed areas and explored some interesting results. The profile index of optical fiber has received less attention compared to other structural parameters of optical fiber but our study at important wavelengths for different profiles has shown that the less-used fiber profiles has some interesting premier outcomes, which can introduce some significant impact on optical fiber based system design and engineering. We have observed almost frequency or wavelength independent transmitted fractional power around the most used 1.55 micrometer wavelengths at some rarely used fiber profile index. Our study predicts the best and worst fiber profiles for transmitted fractional power (T ), at the same time, we have observed the fiber profile index independent region for a band of ‘T’ values. The reporting and its approach are found to be premier in this field. So, our work is reporting a comparison of effective fiber-to-fiber coupling, based on fiber profile index of different fibers. It is also giving a clear view of the wavelength dependency of effective fiber coupling for different fibers having wide range of graded fiber profiles."

High-power InGaAsP edge-emitting LEDs for single-mode optical communication systems

1985 ◽  
Vol 21 (17) ◽  
pp. 730 ◽  
Author(s):  
R. Olshansky ◽  
D. Fye ◽  
J. Manning ◽  
M. Stern ◽  
E. Meland ◽  
...  
Keyword(s):  
Optical Communication ◽  
High Power ◽  
Communication Systems ◽  
Single Mode ◽  
Optical Communication Systems

scholarly journals ADVANTAGES OF OPTICAL ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING IN COMMUNICATIONS SYSTEMS

2016 ◽  
Vol 2 ◽  
pp. 27-33
Author(s):  
Ali Abdourahamane
Keyword(s):  
Optical Communication ◽  
Communication Systems ◽  
Orthogonal Frequency Division Multiplexing ◽  
Optical Signal ◽  
Optical Systems ◽  
Frequency Division Multiplexing ◽  
Frequency Division ◽  
Communications Systems ◽  
Wide Range ◽  
Optical Communication Systems

The role of the optical transmitter is to generate the optical signal, impose the information bearing signal, and launch the modulated signal into the optical fiber. The semiconductor light sources are commonly used in state-of-the-art optical communication systems. Optical communication systems has become one of the important systems after the advent of telephone, internet, radio networks in the second half of the 20th century. The development of optical communication was caused primarily by the rapidly rising demand for Internet connectivity. Orthogonal frequency-division multiplexing (OFDM) belongs to a wide class of multicarrier modulation. Orthogonal frequency-division multiplexing has succeeded in a wide range of applications in the wireless communication domain from video/audio digital broadcasting to wireless local area networks (LANs). Although their very low loss compared to that of the wireless counterpart, optical systems still need renovation for spans commonly less than150 Km. In this paper advantages of optical orthogonal frequency division multiplexing in communications systems will explained.

Feedback effects in optical communication systems: characteristic curve for single-mode InGaAsP lasers

1992 ◽  
Vol 31 (24) ◽  
pp. 5044 ◽  
Author(s):  
F. Brivio ◽  
C. Reverdito ◽  
G. Sacchi ◽  
G. Chiaretti ◽  
M. Milani
Keyword(s):  
Optical Communication ◽  
Communication Systems ◽  
Characteristic Curve ◽  
Single Mode ◽  
Feedback Effects ◽  
Optical Communication Systems

Feasibility Study of Few Mode Fibers as a Sensor

2018 ◽  
Vol 7 (2) ◽  
pp. 14-30
Author(s):  
Chandana S ◽  
Amulya K L ◽  
Bhavana A M ◽  
Chaithra B ◽  
Chaitra S
Keyword(s):  
Communication Systems ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Physiological Parameters ◽  
Physiological Parameter ◽  
Sensing Element ◽  
Interference Spectrum ◽  
Optical Communication Systems ◽  
Linearly Polarized ◽  
Novel Concept

This article describes how few mode fiber (FMF) has found its applications in optical communication systems. We report a novel concept of sensing physiological parameters using FMF, which utilizes Space Division Multiplexing technology (SDM) where SDM supports multiple modes/ paths of fixed bandwidth channels which increases the data carrying capacity in an optical fiber. Here we have considered two linearly polarized (LP) modes namely LP01 and LP11. A segment of FMF is used as sensing element, where it is spliced between two segments of single mode fiber (SMF). The intermodal interference between LP01 mode and LP11 mode of FMF provides an interference spectrum which is sensitive to change in physiological parameters applied on FMF. Hence any change in physiological parameter results to shift in wavelength in interference spectrum which makes FMF as a sensor

scholarly journals Traffic interception in fiber optical video-systems

2021 ◽  
Vol 2086 (1) ◽  
pp. 012150
Author(s):  
Yu E Krivenko ◽  
E I Andreeva
Keyword(s):  
Fiber Optics ◽  
Optical Fibers ◽  
Communication Systems ◽  
Wide Spectrum ◽  
Wave Length ◽  
Single Mode ◽  
Additional Noise ◽  
Optical Communication Systems ◽  
Video Systems ◽  
Increased Sensitivity

Abstract In fiber-optic video systems, as well as in optical communication systems, standard single mode optical fibers (SSMF, standard G.652) are usually used. One of the advantages of these fibers is the ability to use CWDM in a wide spectrum. At the same time, more optimal near the wave-length of 1550 nm are provided by non-zero dispersion fiber (NZDSF, standard G.655) fibers. However, as studies have shown, these optical fibers have an increased sensitivity to bending. This fact can be used to traffic interception. It is shown that fiber-optics systems with SSMF have more protection from traffic interception than systems with NZDSF. To transmit a high-confidentiality video signal, special techniques, such as frequency modulation, can be used, or additional noise signals can be added.

Fabricating Lensed Fiber Using a Novel Polishing Method

2009 ◽  
Vol 131 (4) ◽  
Author(s):  
Yih-Tun Tseng ◽  
Jhong-Bin Huang ◽  
Wei-Jyun Su
Keyword(s):  
High Power ◽  
Communication Systems ◽  
Coupling Efficiency ◽  
Single Mode ◽  
High Power Laser ◽  
Power Laser ◽  
Long Distance ◽  
Mode Field ◽  
Optical Communication Systems ◽  
Distance Communication

In optical communication systems, 980 nm high-power laser modules are applied for long-distance communication amplifiers. Since the mode field of the 980 nm laser diodes is different from single-mode fibers, coupling losses may occur. In order to improve this problem, lensed fibers have been used widely recently, such as lensed fiber employing quadrangular-pyramid-shaped fiber endface (QPSFE). The QPSFE can easily yield any elliptical microlens aspect ratio to match the far field of the high-power laser diode but the fiber endface must be polished and then spliced during present manufacturing process. It is a time-consuming task and the melting depth of the fiber endface is controlled with difficulty. This study develops a novel fiber endface polishing method for manufacturing the lensed fiber employing QPSFE. Using this new method, the coupling efficiency exceeds 70%.

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