A single As2Se3 chalcogenide Highly Non-Linear Fiber (HNLF) based simultaneous all-optical half-adder and half-subtracter

Devra

2017

ijarcs

With the advancement of technology, demand of bandwidth increases exponentially with time. Hence, optical fiber communication become the optimum choice for backbone networks. As efficiency of optical system is limited by congenital parameters such as chromatic dispersion. So, in this work, we have evaluated the ability of electronic equalization scheme reduce the CD (chromatic dispersion for an optical communication system capable of transporting 4 channels at 10 Gbps line rate over a distance of 30km. Further, we compare the performance of decision feedback equalizer with two different configurations.

“…For performance analysis purposes Quality factor (Q-factor) has been adopted as performance metric which is defined in equation No. (1) as follows [12][13][14][15][16][17][18]:…”

Section: Resultsmentioning

confidence: 99%

PERFORMANCE EVALUATION OF DECISION FEEDBACK EQUALIZATION (DFE) BASED DISPERSION COMPENSATOR BY VARYING FORWARD TAP SPACE & ADAPTIVE STEP SIZE IN THE SCENARIO OF 4X10-GBIT/S WDM SYSTEM

Devra

2017

ijarcs

“…The practical on-chip integration applications require several key indexes for these nanoscale all-optical logic devices: ultrasmall feature size, ultralow threshold power, ultrahigh contrast ratio, as well as on-chip trigger [2,3]. More often than not, highly nonlinear fibers [4][5][6], optical asymmetric demultiplexers [7,8], and bulk periodically poled lithium niobate crystals [9][10][11] are used to demonstrate all-optical logic functions. The large size of the bulk materials and lumped components, having a feature size of several centimeters, limits the practical on-chip integration applications [12,13].…”

Section: Introductionmentioning

confidence: 99%

Ultracompact all-optical full-adder and half-adder based on nonlinear plasmonic nanocavities

Xie

Niu

et al. 2017

Nanophotonics

Ultracompact chip-integrated all-optical halfand full-adders are realized based on signal-light induced plasmonic-nanocavity-modes shift in a planar plasmonic microstructure covered with a nonlinear nanocomposite layer, which can be directly integrated into plasmonic circuits. Tremendous nonlinear enhancement is obtained for the nanocomposite cover layer, attributed to resonant excitation, slow light effect, as well as field enhancement effect provided by the plasmonic nanocavity. The feature size of the device is <15 μm, which is reduced by three orders of magnitude compared with previous reports. The operating threshold power is determined to be 300 μW (corresponding to a threshold intensity of 7.8 MW/cm 2 ), which is reduced by two orders of magnitude compared with previous reports. The intensity contrast ratio between two output logic states, "1" and "0," is larger than 27 dB, which is among the highest values reported to date. Our work is the first to experimentally realize on-chip halfand full-adders based on nonlinear plasmonic nanocavities having an ultrasmall feature size, ultralow threshold power, and high intensity contrast ratio simultaneously.This work not only provides a platform for the study of nonlinear optics, but also paves a way to realize ultrahighspeed signal computing chips.

“…It has advantages high speed, low cost, high bandwidth, quick installation high security and also license-free longer range spectrum [2]. But in fiber case have problem that is dispersion, nonlinear impacts in a transmission line but not in the FSO channel [3-5-6] and FSO system is also severely limited by the four wav mixing effect [4]. Free space optics work on the principal of laser driven technology which use light source and detectors to transmit and receive information, through the atmosphere same as the Fiber Optic communication cable [2].…”

Section: Introductionmentioning

confidence: 99%

Simulative Performance Evaluation of a Free Space Optical Communication Link Operating at 1550 nm using Different Modulation Formats

Singh¹,

Singh²,

Devra³

2016

IJCATR

Self Cite

FSO enables to provide last mile transmission reach with some advantages such as inherent security and no electrical hazards without laying any fiber or cable. In this paper we have analyzed the performance of free space optics communication system by employing five transmitters (CSNRZ CSRZ DBNRZ MDBNRZ and MDBRZ) for different attenuation values at 10Gbps up to the transmission distance of 1100m. The effect of beam divergence, transmitter losses, receiver losses and receiver aperture diameter is also calculated on the performance of proposed hybrid modulation format based free space optical communication system.