Quality Signal Degradation in Single-Channel Fiber Using 10 Gbps Bit Rate

2021 ◽  
Vol 11 (1) ◽  
pp. 105
Author(s):  
Nabila Syadzwina Effendi ◽  
Yus Natali ◽  
Catur Apriono
Keyword(s):  
Single Channel ◽  
Bit Rate ◽  
Signal Degradation ◽  
Quality Signal

scholarly journals Hybrid compensation of polarization-multiplexed QPSK optical format for high bit rate networks

2020 ◽  
Vol 20 (3) ◽  
pp. 1325
Author(s):  
Omar Y. Shabaan ◽  
Omar A. Athab
Keyword(s):  
Single Channel ◽  
Optical Network ◽  
Digital Signal ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Bit Rate ◽  
Fiber Network ◽  
Transmission Distance ◽  
Regeneration Stage ◽  
High Bit Rate

<span lang="EN-GB">Transmitting the highest capacity throughput over the longest possible distance without any regeneration stage is an important goal of any long-haul optical network system. Accordingly, Polarization-Multiplexed Quadrature Phase-Shift-Keying (PM-QPSK) was introduced lately to achieve high bit-rate with relatively high spectral efficiency. Unfortunately, the required broad bandwidth of PM-QPSK increases the linear and nonlinear impairments in the physical layer of the optical fiber network. Increased attention has been spent to compensate for these impairments in the last years. In this paper, Single Mode Fiber (SMF), single channel, PM-QPSK transceiver was simulated, with a mix of optical and electrical (Digital Signal Processing (DSP)) compensation stages to minimize the impairments. The behaviour of the proposed system was investigated under four conditions: without compensation, with only optical compensator, with only DSP compensator and finally with both compensators. An evidence improvement was noticed in the case of hybrid compensation, where the transmission distance was multiplied from (720 km) to more than (3000 km) at 40 Gb/s.</span>

scholarly journals Performance Investigation of Different Dispersion Compensation Methods in Optical Fiber Communication

2020 ◽  
pp. 36-44 ◽  
Author(s):  
Md. Bipul Hossain ◽  
Apurba Adhikary ◽  
Tanvir Zaman Khan
Keyword(s):  
Optical Fiber ◽  
Single Channel ◽  
Dispersion Compensation ◽  
Optical Fiber Communication ◽  
Fiber Communication ◽  
Signal Degradation ◽  
Dispersion Compensation Fiber ◽  
Compensation Methods ◽  
System Length ◽  
Quality Factor Q

In optical fiber Communication system dispersion compensation has become one of the major topics of importance and research nowadays. This is because any presence of dispersion might leads to pulse spreading which might cause inters symbolic interference (ISI) and which leads to signal degradation. In this paper six different model are considered for dispersion compensation. Dispersion compensation fiber (DCF) is used to design first three models by using its three different configurations of pre-compensation, post-compensation, symmetrical compensation and Fiber Bragg Gratings (FBG), uniform FBG, IDCFBG are used for designing rest of three dispersion compensation models. Single channel optical system length of 100 km with data rate of 2.5 Gbps and 10 Gbps is used to design each model and is simulated by using optisystem software package. All the designs are compared with respect to the quality factor (Q-factor) and bit error rate (BER). With the outcome of the simulations results it is seen that post–compensation DCF model is the promising approach.

Comparison of Several Data Representations for a Single-Channel Optic System with 10 Gbps Bit Rate

2021 ◽  
pp. 89-98
Author(s):  
Ihsan A. Alshimaysawe ◽  
Hayder Fadhil Abdulsada ◽  
Saif H. Abdulwahed ◽  
Mohannad A. M. Al-Ja’afari ◽  
Ameer H. Ali
Keyword(s):  
Single Channel ◽  
Bit Rate ◽  
Optic System ◽  
Data Representations

Data Acquisition and Handling Unit for a Quantitative Use of Electron Energy Loss Spectroscopy

1977 ◽  
Vol 35 ◽  
pp. 232-233 ◽  
Author(s):  
P. Trebbia ◽  
P. Ballongue ◽  
C. Colliex
Keyword(s):  
Electron Microscope ◽  
Energy Loss ◽  
Electron Energy ◽  
Electron Energy Loss Spectroscopy ◽  
Single Channel ◽  
Detection System ◽  
Surface Barrier ◽  
Solid State Detector ◽  
Electrostatic Mirror ◽  
Electron Energy Loss

An effective use of electron energy loss spectroscopy for chemical characterization of selected areas in the electron microscope can only be achieved with the development of quantitative measurements capabilities.The experimental assembly, which is sketched in Fig.l, has therefore been carried out. It comprises four main elements.The analytical transmission electron microscope is a conventional microscope fitted with a Castaing and Henry dispersive unit (magnetic prism and electrostatic mirror). Recent modifications include the improvement of the vacuum in the specimen chamber (below 10-6 torr) and the adaptation of a new electrostatic mirror.The detection system, similar to the one described by Hermann et al (1), is located in a separate chamber below the fluorescent screen which visualizes the energy loss spectrum. Variable apertures select the electrons, which have lost an energy AE within an energy window smaller than 1 eV, in front of a surface barrier solid state detector RTC BPY 52 100 S.Q. The saw tooth signal delivered by a charge sensitive preamplifier (decay time of 5.10-5 S) is amplified, shaped into a gaussian profile through an active filter and counted by a single channel analyser.

Instrumentation for Measurement of Lingual Strength

1968 ◽  
Vol 11 (1) ◽  
pp. 189-193 ◽  
Author(s):  
Lois Joan Sanders
Keyword(s):  
Single Channel ◽  
Displacement Transducer ◽  
Tongue Pressure ◽  
Maximum Pressure ◽  
Research Use ◽  
Direct Writing ◽  
Significant Difference ◽  
Pressure Unit ◽  
Force Displacement ◽  
Consistent Response

A tongue pressure unit for measurement of lingual strength and patterns of tongue pressure is described. It consists of a force displacement transducer, a single channel, direct writing recording system, and a specially designed tongue pressure disk, head stabilizer, and pressure unit holder. Calibration with known weights indicated an essentially linear and consistent response. An evaluation of subject reliability in which 17 young adults were tested on two occasions revealed no significant difference in maximum pressure exerted during the two test trials. Suggestions for clinical and research use of the instrumentation are noted.

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