High-performance dynamic gain equalizer for advanced DWDM optical networks

2002 ◽  
Author(s):  
Jahja I. Trisnadi ◽  
Clinton B. Carlisle ◽  
Robert J. Monteverde
Keyword(s):  
Optical Networks ◽  
High Performance ◽  
Dynamic Gain

scholarly journals APPLICATIONS OF THE LIGHT LASER WITH SPATIAL INCOHERENCE AND BIONIC OPTIMIZATION TO THE OPTICAL WIRELESS COMMUNICATIONS

2014 ◽  
Vol 25 (1) ◽  
pp. 169-185
Author(s):  
Samuel Ángel Jaramillo Flórez ◽  
Yuli Fernanda Achipiz
Keyword(s):  
Optical Networks ◽  
Optical Fibers ◽  
Optical Communications ◽  
High Performance ◽  
Computational Simulation ◽  
Original Method ◽  
Infrared Light ◽  
Optical Receivers ◽  
Spherical Lens ◽  
Optical Wireless Communications

The bioelectronics takes of the biology the optimized elements for to do a copy and to build technological mechanisms with functions based in that of body lives components. Telecommunications and biology present an analogy between the optical receivers and insects eyes, which forms are adequate to receipt signal since a transmitter, and these are been leaded to perfection by the nature during millions of years in the environment adaptation. The sizes and the forms depend of the direction of the waves and of the radiation pattern of these biotransmitters and bioreceivers (omatidies of insects eyes), which is similar as the optical communications emitters and photodetectors. The growth of the telecommunication services makes necessary the optimization of the bandwidth of the transmission channels. Although the optic transmission is considered like the ideal as for the attenuation and distortion characteristics that make that it possesses the better relation bandwidth - longitude, the demand of more transmission capacity forces to take advantage of them efficiently. High costs generated when deploying Optic Fiber Networks at the transport level, together with other factors that avoid PONs arriving to the home and/or office, have impulsed the design and implementation of partially optical networks (FITL), including an alternative that uses infrared light. This work explores the basis of these news access networks, and it is presented an optical communication transmission/reception system with optic channel of free space where has been modulated the transmitter laser through a set of spherical lens and optical fibers that expand the beam of light to different points of an indoor enclosure producing multiple punctual images located in positions that permit to determine and to optimize the bandwidth of the system. The computational simulation results are showed and are compared with those experimentally measured, indicating that this is an original method for to design emitters and receivers of high performance for optical communications.

scholarly journals Detailed Theoretical Model for Adjustable Gain-Clamped Semiconductor Optical Amplifier

2012 ◽  
Vol 2012 ◽  
pp. 1-7
Author(s):  
Lin Liu ◽  
Craig Michie ◽  
Anthony E. Kelly ◽  
Ivan Andonovic
Keyword(s):  
Theoretical Model ◽  
Optical Networks ◽  
Dynamic Systems ◽  
Semiconductor Optical Amplifier ◽  
Ring Cavity ◽  
Optical Amplifier ◽  
Gain Modulation ◽  
Linear Amplification ◽  
Gain Clamping ◽  
Dynamic Gain

The adjustable gain-clamped semiconductor optical amplifier (AGC-SOA) uses two SOAs in a ring-cavity topology: one to amplify the signal and the other to control the gain. The device was designed to maximize the output saturated power while adjusting gain to regulate power differences between packets without loss of linearity. This type of subsystem can be used for power equalisation and linear amplification in packet-based dynamic systems such as passive optical networks (PONs). A detailed theoretical model is presented in this paper to simulate the operation of the AGC-SOA, which gives a better understanding of the underlying gain clamping mechanics. Simulations and comparisons with steady-state and dynamic gain modulation experimental performance are given which validate the model.

Performance of different hybrid dispersion compensation modules (DCMs) in long reach ultra dense WDM passive optical networks

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Shippu Sachdeva ◽  
Jagjit Malhotra ◽  
Manoj Kumar
Keyword(s):  
Optical Networks ◽  
Cost Reduction ◽  
High Performance ◽  
Performance Enhancement ◽  
Dispersion Compensation ◽  
Optical Network ◽  
Passive Optical Network ◽  
Dense Wdm ◽  
And Performance ◽  
Wdm Pon

Abstract Long reach Passive optical network (LR-PON) is an attractive solution to fulfill the ever-increasing bandwidth requirements due to propelling internet applications and competent to serve distant optical network units (ONUs). Wavelength division multiplexed (WDM) PON systems experience distance and performance limiting constraint termed as Dispersion. In order to compensate dispersion effects, Fiber bragg gratings (FBGs) and Dispersion compensation fibers (DCFs) are incorporated extensively in PONs. Performance of DCF is better than FBG in terms of dispersion compensation, but it comes at the cost of 3 $/m (very expensive). Therefore, long reach ultra dense WDM-PON systems are needed with incorporation of economical and high performance DCMs. Three newly constructed hybrid DCMs are investigated such as FBG-DCF (module 1), OPC-DCF (module 2), and FBG-DCF-OPC (module 3) in WDM-PON to get optimal DCM in terms of dispersion compensation efficiency (DCE) and economical operation. As per author’s best knowledge, DCE calculations and performance enhancement with cost reduction using hybrid DCMs in ultra dense WDM-PON, is not reported so far. WDM-PON consists of 32 channels at 25 GHz channel spacing is analyzed for 300 km link distance at 10 Gbps/channel using different hybrid DCMs. It is perceived that highest DCE of 70% is given by module 3 with maximum cost reduction of 19.84%. DCE performance of three modules is as follows: Module 3 (DCE 70%), Module 1 (DCE 55%), Module 2 (DCE 45%) and cost reduction/increase from conventional module by 19.84% reduction (Module 3), 19.05% reduction (Module 1), and increase 10.5% (Module 2). Hence, Module 3 is preferred for long reach WDM-PON to get high performance with lesser cost.

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