scholarly journals MOCVD Growth and Fabrication of High Power MUTC Photodiodes Using InGaAs-InP System

2015 ◽  
Vol 2015 ◽  
pp. 1-6
Author(s):  
Nandan Singh ◽  
Charles Kin Fai Ho ◽  
Guo Xin Tina ◽  
Manoj Kumar Chandra Mohan ◽  
Kenneth Eng Kian Lee ◽  
...  
Keyword(s):  
Communication Systems ◽  
Single Mode ◽  
Fast Response ◽  
Antireflection Coating ◽  
Single Mode Fiber ◽  
Device Fabrication ◽  
Group V ◽  
Mocvd Growth ◽  
Diode Ideality Factor ◽  
Processing Techniques

We report charge-compensated modified uni-traveling-carrier photodiodes (MUTC-PDs) with high photocurrent and fast response, grown using liquid group-V precursor, in an AIXTRON MOCVD system. The liquid group-V precursors involve less toxicity with better decomposition characteristics. Device fabrication is completed with standard processing techniques with BCB passivation. DC and RF measurements are carried out using a single mode fiber at 1.55 μm. For a 24-μm-diameter device (with diode ideality factor of 1.34), the dark current is 32.5 nA and the 3-dB bandwidth is ≫20 GHz at a reverse bias of 5 V, which are comparable to the theoretical values. High photocurrent of over 150.0 mA from larger diameter (>60 μm) devices is obtained. The maximum DC responsivity at 1.55 μm wavelength is 0.51 A/W, without antireflection coating. These photodiodes play a key role in the progress of the future THz communication systems.

The Engagement of Hybrid Ultra High Space Division Multiplexing with Maximum Time Division Multiplexing Techniques for High-Speed Single-Mode Fiber Cable Systems

2019 ◽  
Vol 0 (0) ◽  
Author(s):  
I. S. Amiri ◽  
P. G. Kuppusamy ◽  
Ahmed Nabih Zaki Rashed ◽  
P. Jayarajan ◽  
M. R. Thiyagupriyadharsan ◽  
...  
Keyword(s):  
Communication Systems ◽  
High Speed ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Design Parameters ◽  
Control Parameters ◽  
Data Rates ◽  
Fiber Optic Communication ◽  
High Space ◽  
Optic Communication

AbstractHigh-speed single-mode fiber-optic communication systems have been presented based on various hybrid multiplexing schemes. Refractive index step and silica-doped germanium percentage parameters are also preserved during their technological boundaries of attention. It is noticed that the connect design parameters suffer more nonlinearity with the number of connects. Two different propagation techniques have been used to investigate the transmitted data rates as a criterion to enhance system performance. The first technique is soliton propagation, where the control parameters lead to equilibrium between the pulse spreading due to dispersion and the pulse shrinking because of nonlinearity. The second technique is the MTDM technique where the parameters are adjusted to lead to minimum dispersion. Two cases are investigated: no dispersion cancellation and dispersion cancellation. The investigations are conducted over an enormous range of the set of control parameters. Thermal effects are considered through three basic quantities, namely the transmission data rates, the dispersion characteristics, and the spectral losses.

Progress towards heterodyne-type single-mode fiber communication systems

1981 ◽  
Vol 17 (6) ◽  
pp. 897-906 ◽  
Author(s):  
F. Favre ◽  
L. Jeunhomme ◽  
I. Joindot ◽  
M. Monerie ◽  
J.C. Simon
Keyword(s):  
Communication Systems ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Fiber Communication

Research on Relationship of Polarization and Rayleigh Backscatter in Bidirectional Fiber Communication Systems

2013 ◽  
Vol 312 ◽  
pp. 625-630
Author(s):  
Yan Hong Wang ◽  
Gao Wang ◽  
Ji Liu
Keyword(s):  
Communication Systems ◽  
Polarization State ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Light Polarization ◽  
Polarization Property ◽  
Orthogonal Polarization ◽  
Fiber Communication ◽  
Order Of Magnitude ◽  
Relationship Of

In this paper, the general theory and polarization property of RB in single mode fiber is discussed. According to the theoretical analysis results, the bidirectional carrying system with a polarization rotating device for analog radio frequency (RF) signal is set up. The relationship of the system CRN and the different polarization state by the polarization rotating device is studied. The results show that the RB light polarization state of backward fiber end can keep to perpendicular to that of forward light when backward lights polarization is orthogonal forward lights polarization. So utilizing orthogonal polarization method for decreasing CRN can be carried on. The system performance is analyzed by simulation. The simulation results show that CRN of the bidirectional communication system on a single mode fiber can be inhibited by using the method and RB light can decrease by an order of magnitude.

scholarly journals Multifunctional Smart Optical Fibers: Materials, Fabrication, and Sensing Applications

Photonics ◽  
2019 ◽  
Vol 6 (2) ◽  
pp. 48 ◽  
Author(s):  
Zhengyong Liu ◽  
Zhi Zhang ◽  
Hwa-Yaw Tam ◽  
Xiaoming Tao
Keyword(s):  
Optical Fibers ◽  
Silica Glass ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Device Fabrication ◽  
Fiber Sensors ◽  
Sensing Applications ◽  
Fiber Design ◽  
Healthcare Monitoring ◽  
Multiple Materials

This paper presents a review of the development of optical fibers made of multiple materials, particularly including silica glass, soft glass, polymers, hydrogels, biomaterials, Polydimethylsiloxane (PDMS), and Polyperfluoro-Butenylvinyleth (CYTOP). The properties of the materials are discussed according to their various applications. Typical fabrication techniques for specialty optical fibers based on these materials are introduced, which are mainly focused on extrusion, drilling, and stacking methods depending on the materials’ thermal properties. Microstructures render multiple functions of optical fibers and bring more flexibility in fiber design and device fabrication. In particular, micro-structured optical fibers made from different types of materials are reviewed. The sensing capability of optical fibers enables smart monitoring. Widely used techniques to develop fiber sensors, i.e., fiber Bragg grating and interferometry, are discussed in terms of sensing principles and fabrication methods. Lastly, sensing applications in oil/gas, optofluidics, and particularly healthcare monitoring using specialty optical fibers are demonstrated. In comparison with conventional silica-glass single-mode fiber, state-of-the-art specialty optical fibers provide promising prospects in sensing applications due to flexible choices in materials and microstructures.

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

A 500 MHz driver for single-mode fiber-optic communication systems

1978 ◽  
Author(s):  
I. Ladany ◽  
H.J. Wolkstein ◽  
D. Botez ◽  
R.S. Crandall ◽  
B.R. Dornan ◽  
...  
Keyword(s):  
Communication Systems ◽  
Fiber Optic ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Fiber Optic Communication ◽  
Optic Communication
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