scholarly journals Research of Fiber Optic Connector Ferrule End-Face Degradation Influence on Optical Pulse Distortion during Propagation over Indoor Multi-Gigabit Optical Network Link with Crypto-Fibers

2021 ◽  
Vol 7 (4) ◽  
pp. 18-30
Author(s):  
A. Bourdine ◽  
S. Pashin
Keyword(s):  
Optical Pulse ◽  
Fiber Optic ◽  
Optical Network ◽  
Optical Signal ◽  
Pulse Response ◽  
Laser Source ◽  
Pulse Distortion ◽  
Comparison Results ◽  
Network Link

This article presents results of approbation of developed model of piece-wise regular fiber optic link, operating in a few-mode regime, with series-connected couple of special multimode optical crypto-fibers “encryptor-decoder”. Unlike the previously developed solution, the model was modified with an ability to take into account influence of fiber optic connector end-face contamination on laser-excited optical signal launching conditions. We present comparison results of computed optical pulse response envelops, distorted during propagation over 10GBase-LX network fiber optic links, containing optical crypto-fibers, depending on various conditions of transceiver laser source connector ferrule end-face contamination.

scholarly journals Novel Bloch wave excitation platform based on few-layer photonic crystal deposited on D-shaped optical fiber

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Esteban Gonzalez-Valencia ◽  
Ignacio Del Villar ◽  
Pedro Torres
Keyword(s):  
Optical Fibers ◽  
High Performance ◽  
Light Propagation ◽  
Fiber Optic ◽  
Layer Structure ◽  
Optical Network ◽  
Building Blocks ◽  
Bloch Wave ◽  
Nanophotonic Devices ◽  
Wide Range

AbstractWith the goal of ultimate control over the light propagation, photonic crystals currently represent the primary building blocks for novel nanophotonic devices. Bloch surface waves (BSWs) in periodic dielectric multilayer structures with a surface defect is a well-known phenomenon, which implies new opportunities for controlling the light propagation and has many applications in the physical and biological science. However, most of the reported structures based on BSWs require depositing a large number of alternating layers or exploiting a large refractive index (RI) contrast between the materials constituting the multilayer structure, thereby increasing the complexity and costs of manufacturing. The combination of fiber–optic-based platforms with nanotechnology is opening the opportunity for the development of high-performance photonic devices that enhance the light-matter interaction in a strong way compared to other optical platforms. Here, we report a BSW-supporting platform that uses geometrically modified commercial optical fibers such as D-shaped optical fibers, where a few-layer structure is deposited on its flat surface using metal oxides with a moderate difference in RI. In this novel fiber optic platform, BSWs are excited through the evanescent field of the core-guided fundamental mode, which indicates that the structure proposed here can be used as a sensing probe, along with other intrinsic properties of fiber optic sensors, as lightness, multiplexing capacity and easiness of integration in an optical network. As a demonstration, fiber optic BSW excitation is shown to be suitable for measuring RI variations. The designed structure is easy to manufacture and could be adapted to a wide range of applications in the fields of telecommunications, environment, health, and material characterization.

Hybrid FSO/fiber optic link based reliable & energy efficient WDM optical network architecture

2021 ◽  
Vol 61 ◽  
pp. 102422
Author(s):  
Amit Kumar Garg ◽  
Vijay Janyani ◽  
Bostjan Batagelj ◽  
N.H. Zainol Abidin ◽  
M.H. Abu Bakar
Keyword(s):  
Energy Efficient ◽  
Network Architecture ◽  
Fiber Optic ◽  
Optical Network

scholarly journals Testing Time and Frequency Fiber-Optic Link Transfer by Hardware Emulation of Acoustic-Band Optical Noise

2016 ◽  
Vol 23 (2) ◽  
pp. 309-316
Author(s):  
Marcin Lipiński ◽  
Przemysław Krehlik ◽  
Łukasz Śliwczyński ◽  
Łukasz Buczek ◽  
Jacek Kołodziej
Keyword(s):  
Fiber Optic ◽  
Data Transfer ◽  
Acoustic Noise ◽  
Mechanical Vibration ◽  
Low Frequency ◽  
Propagation Delay ◽  
Optical Signal ◽  
Testing Time ◽  
Optical Noise ◽  
Signal Phase

Abstract The low-frequency optical-signal phase noise induced by mechanical vibration of the base occurs in field-deployed fibers. Typical telecommunication data transfer is insensitive to this type of noise but the phenomenon may influence links dedicated to precise Time and Frequency (T&F) fiber-optic transfer that exploit the idea of stabilization of phase or propagation delay of the link. To measure effectiveness of suppression of acoustic noise in such a link, a dedicated measurement setup is necessary. The setup should enable to introduce a low-frequency phase corruption to the optical signal in a controllable way. In the paper, a concept of a setup in which the mechanically induced acoustic-band optical signal phase corruption is described and its own features and measured parameters are presented. Next, the experimental measurement results of the T&F transfer TFTS-2 system’s immunity as a function of the fibre-optic length vs. the acoustic-band noise are presented. Then, the dependency of the system immunity on the location of a noise source along the link is also pointed out.

FIBER-OPTIC FORCE SENSOR: MATHEMATICAL MODEL, CONVERSION FUNCTION, PROTOTYPE DESIGN

2020 ◽  
Vol 6 (99) ◽  
pp. 45-58
Author(s):  
KONSTANTIN A. KHARAKHNIN ◽  
DENIS A. TERESHIN ◽  
DMITRY V. VAKHRAMEEV ◽  
PAVEL S. VAKHRAMEEV
Keyword(s):  
Power Loss ◽  
Fiber Optic ◽  
Force Sensor ◽  
Optical Signal ◽  
Conversion Function ◽  
Design Parameters ◽  
Bending Radius ◽  
Applied Forces ◽  
Model Conversion ◽  
Prototype Design

The article considers the problem of the lack of methods for calculating and selecting design parameters when developing and implementing a fiber-optic force sensor (FOFS) as a separate element or component of the system. To solve this problem, we propose to develop a transform function of the power loss of the optical signal from the bending radius of the fiber under the action of applied forces, linking the features of the optical fiberand physico-mechanical parameters of the base on which the fiber is located. Based on the calculations performed, a variant of the FOFS prototype design is proposed.

SIGNAL PROCESSING IN PHOTONIC CRYSTALS AND NANOSTRUCTURES

2006 ◽  
Vol 15 (01) ◽  
pp. 55-76
Author(s):  
S. WABNITZ
Keyword(s):  
Signal Processing ◽  
Photonic Crystals ◽  
Frequency Conversion ◽  
Optical Signal ◽  
Optical Pulses ◽  
Linear Dispersion ◽  
Polarized Beams ◽  
Pulse Distortion ◽  
All Optical ◽  
Crystal Fibers

Optical devices employing photonic crystals and novel nanostructure materials may exhibit useful properties for applications to all-optical signal processing. In this work we analyze as a first example four-wave mixing of polarized beams in photonic crystal fibers. We show that by properly tuning the pump wavelength and the linear dispersion properties of the fiber one may obtain broadband parametric amplification and frequency conversion. Next we consider the in-line periodic amplification of short optical pulses by means of quantum-dot semiconductor optical amplifiers. We show by numerical simulations that pattern-free amplification of a 40 Gbit/s soliton signal at 1300 nm is possible without any inter-symbol interference or nonlinear pulse distortion caused by the fast gain dynamics.

scholarly journals Optimizing Crosstalk in Optical NoC through Heuristic Fusion Mapping

Electronics ◽  
2020 ◽  
Vol 9 (6) ◽  
pp. 1006
Author(s):  
Xinhao Shi ◽  
Ning Wu ◽  
Fen Ge ◽  
Fang Zhou ◽  
Muhammad Rehan Yahya
Keyword(s):  
Simulated Annealing Algorithm ◽  
Interconnection Network ◽  
Optical Network ◽  
Optical Signal ◽  
Crosstalk Noise ◽  
Mapping Algorithm ◽  
Annealing Algorithm ◽  
On Chip ◽  
Mapping Scheme ◽  
Better Than

Optical network-on-chip is considered to be a promising technology to solve the problems of low bandwidth and high latency in the traditional interconnection network. However, due to the inevitable leakage of optical devices, the optical signal will receive crosstalk noise during transmission. In this paper, a heuristic fusion mapping algorithm PSO_SA for crosstalk optimization is proposed. First, the initial optimal mapping is obtained by particle swarm optimization, and then the local optimization of the mapping scheme is removed by combining with simulated annealing algorithm. The experimental results show that the crosstalk optimization performance of PSO_SA algorithm is better than that of GA algorithm in 263 dec, Wavelet, DVOPD and other applications, and the maximum optimization degree is 28.7%.

scholarly journals Design of Silica Multimode Optical Fibers with Extremely Enlarged Core Diameter for Laser-Based Multi-Gigabit Short-Range Optical Networks

Photonics ◽  
2018 ◽  
Vol 5 (4) ◽  
pp. 37 ◽  
Author(s):  
Anton V. Bourdine ◽  
Vladimir A. Burdin ◽  
Vijay Janyani ◽  
Ashish Kumar Ghunawat ◽  
Ghanshyam Singh ◽  
...  
Keyword(s):  
Refractive Index ◽  
Optical Networks ◽  
Optical Fibers ◽  
Short Range ◽  
Fiber Optic ◽  
Index Profile ◽  
Core Diameter ◽  
Simple Method ◽  
Graded Index ◽  
Comparison Results

This work presents an alternative fast and simple method for the design of a refractive index profile of silica multimode optical fibers (MMFs) with extremely enlarged core diameters of up to 100 µm for laser-based multi-gigabit short-range optical networks. We demonstrate some results of 100 µm core MMF graded index profile optimization performed by a proposed solution, which provides a selected mode staff differential mode delay (DMD) reduction over the “O”-band under particular launching conditions. Earlier on, a developed alternative model for a piecewise regular multimode fiber optic link operating in a few-mode regime for the computation of laser-excited optical pulse dynamics during its propagation over an irregular silica graded-index MMF with an extremely large core diameter, is utilized to estimate the potentiality of fiber optic links with the described MMFs. Here, we also present the comparison results of the simulation of 10GBase-LX optical signal transmission over 100 µm core MMFs with conventional and optimized graded-index refractive index profiles.

Construction and Evaluation of the Fiber-Optic Sensor System for Chemical Vapor Detection

2008 ◽  
Vol 55-57 ◽  
pp. 509-512 ◽  
Author(s):  
M. Kittidechachan ◽  
I. Sripichai ◽  
W. Supakum ◽  
S. Thuamthai ◽  
Suppalak Angkaew ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Fiber Optic ◽  
Chemical Vapor ◽  
Fiber Optic Sensor ◽  
Sensor System ◽  
Laser Source ◽  
Vapor Concentration ◽  
Vapor Detection ◽  
Optic Sensor ◽  
Butyl Amine

The fiber optic sensor system for chemical vapor detection was desiged and constructed. The system consisted of three parts; the optic unit, the fiber-optic sensing head and the flow controlling unit. The optic unit included a He-Ne laser source which lazes a red laser into an aligned optical fiber, a photo detector, and a signal processing with computer interface controlled by the Labview® program version 7.1. The sensing head was made of a polyaniline thin film coated onto the de-cladded section of an optical fiber covered by a gas mixing cell. The concentration of measured gas was controlled by varying nitrogen gas flow rate. The nitrogen flow controller was set-up to obtain vapor concentration in the range of 0.04 to 0.40 % v/v. Vapors of hydrochloric acid (HCl) and n-butyl amine (a weak base) were used to test the performance of the sensor system. It was found that output intensity increases with an increasing HCl concentration and decreases with increasing n-butyl amine concentration. The response toward the amine vapor was faster than that of the HCl vapor (23 seconds for n-butyl amine and 72 seconds for HCl). Experiments performed at various concentrations of amine vapor (between 0.04 to 0.21 %v/v) found that a higher concentration yields faster response time.

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