NOVEL MULTIWAVELENGTH MODE-LOCKED SEMICONDUCTOR LASERS: PHYSICS AND APPLICATIONS

2000 ◽  
Vol 10 (01) ◽  
pp. 309-317 ◽  
Author(s):  
P. J. DELFYETT ◽  
B. MATHASON ◽  
I. NITTA ◽  
H. SHI
Keyword(s):  
Semiconductor Lasers ◽  
System Performance ◽  
State Of The Art ◽  
Hybrid Approach ◽  
High Data Rate ◽  
Technology Platform ◽  
Wavelength Division ◽  
Wavelength Division Multiplexed ◽  
High Data ◽  
Communication Links

We develop and study the physics of a novel hybrid wavelength-division-multiplexed, optical timedivision-multiplexed (WDM-OTDM) mode-locked semiconductor laser for applications in ultra-high data rate communication links, computer interconnects, and optical sampling applications. The key philosophy behind using a hybrid approach is that state-of-the-art system performance can be achieved without the necessity of operating at the limits of a either a pure WDM or OTDM technology platform.

Demonstration of high-data-rate wavelength division multiplexed transmission over a 150 km free space optical link

2007 ◽  
Author(s):  
David W. Young ◽  
Joseph E. Sluz ◽  
Juan C. Juarez ◽  
Marc B. Airola ◽  
Raymond M. Sova ◽  
...  
Keyword(s):  
Free Space ◽  
Data Rate ◽  
High Data Rate ◽  
Free Space Optical ◽  
Optical Link ◽  
Wavelength Division ◽  
Wavelength Division Multiplexed ◽  
High Data

Effects of Order Super Gaussian Pulses on the Performance of High Data Rate Optical Fiber Channel in the Presence of Self Phase Modulation

2019 ◽  
Vol 0 (0) ◽  
Author(s):  
IS Amiri ◽  
Ahmed Nabih Zaki Rashed ◽  
P. Yupapin
Keyword(s):  
Optical Fiber ◽  
System Performance ◽  
Phase Modulation ◽  
Communication Channel ◽  
High Data Rate ◽  
Fiber Communication ◽  
High Data ◽  
Data Rates ◽  
Transmission Data ◽  
Different Order

AbstractThe work has simulated different order Gaussian pulses effects on the high data rate fiber communication channel and optical receiver sensitivity with/without self-phase modulation (SPM). The light signal per noise ratio, and total dispersion coefficient after optical fiber communication channel are measured at different order Gaussian pulses. Receiver sensitivity and maximum Q-factor are also measured for an optical receiver at high transmission data rates at different order Gaussian pulses. As well as Soliton peak power is measured for different transmission data rates with/without SPM effects. It is observed that the system performance is degraded over 100 Gb/s data transmission and 50 km fiber distance especially in the presence of SPM effects. It is evident that the system performance efficiency is degraded with high order Gaussian pulses. It is recommended to use first-order Gaussian pulse for upgrade optical communication system performance efficiency.

VERY HIGH SPEED OEIC TRANSMITTERS FOR FUTURE OPTICAL TRANSMISSION SYSTEMS AND OPTICAL NETWORKS

1991 ◽  
Vol 02 (01n02) ◽  
pp. 21-44 ◽  
Author(s):  
Y.H. LO ◽  
T.P. LEE
Keyword(s):  
Optical Networks ◽  
High Speed ◽  
Hybrid Approach ◽  
Dominant Factor ◽  
Substrate Thickness ◽  
Wavelength Division ◽  
Wavelength Division Multiplexed ◽  
Bonding Wires ◽  
Wavelength Control ◽  
And Performance

The technology and system applications of high speed OEIC transmitters are discussed in this paper. With only two MOCVD growths and conventional processing techniques, OEIC transmitters made of sophisticated DFB laser diodes and InGaAs/InAlAs MODFETs can be fabricated. A speed of 10 Gbit/s has been demonstrated. Using the same technology, OEIC transmitters for high bit rate time division multiplexed (TDM) and dense wavelength division multiplexed (WDM) systems are designed and fabricated. There is evidence showing that the OEIC transmitter integrated with multiplexers and other critical circuits can offer significant cost reduction and performance improvement compared to hybrid approach. Using a four-channel OEIC WDM transmitter, we demonstrate its capability of precise wavelength control by setting the channel spacing as close as 0.3 nm. Finally, the crosstalk of OEIC is analyzed. Bonding wires are confirmed as the dominant factor for RF crosstalk. To keep the thermal crosstalk within an acceptable level, a proper device spacing to substrate thickness ratio has to be chosen.

scholarly journals HIGH DATA RATE WDM SYSTEMS-BASED GRAPHENE CARRIERS

2020 ◽  
Vol 15 (11) ◽  
Author(s):  
Saib Thiab Alwan
Keyword(s):  
Wavelength Division Multiplexing ◽  
Data Rate ◽  
High Data Rate ◽  
Optical Channel ◽  
Phase Shift Keying ◽  
Error Vector Magnitude ◽  
Wavelength Division ◽  
High Data ◽  
Shift Keying ◽  
Vector Magnitude

In this paper, carrier’s generation-based graphene with applicability for wavelength division multiplexing (WDM) systems have been produced via an illumination of graphene by 980 nm. This technique allowed for servicing of a greater number of channels in a WDM system, and the carriers were able to travel in an optical channel with high data rate. Eight carriers, having a frequency spacing (FS) of 25 GHz and full-width at half-maximum (FWHM) of 500 MHz, were created. These generated carriers were separately modulated with eight optical quadrature phase shift keying (QPSK) signals and subsequently optically multiplexed and transmitted to an optical fiber channel. At the receiver side, the received signal was demultiplexed, and the performance of the system was analyzed via calculating the error vector magnitude and constellation diagram of the entire system. Opti System version 17.1 and Matlab software are used for demonstration of WDM system and carrier generation.

Nature-Inspired-Based PTS for PAPR Reduction in OFDM Systems

2020 ◽  
pp. 57-88
Author(s):  
Mohamed Mounir ◽  
Mohamed Bakry El Mashade ◽  
Gurjot Singh Gaba
Keyword(s):  
Computational Complexity ◽  
System Performance ◽  
Reduction Technique ◽  
High Data Rate ◽  
Papr Reduction ◽  
Ofdm Systems ◽  
High Data ◽  
Single Solution ◽  
Suboptimal Solution ◽  
Better Than

OFDM is widely used in high data rate applications due to its ability to mitigate frequency selectivity. However, OFDM suffers from high PAPR problem. This degrades the system performance. PTS is a promising PAPR reduction technique. However, its computational complexity is large; to reduce it, different suboptimal solution (heuristics) were presented in literature. Heuristics PTS algorithms can be categorized into descent-heuristics and metaheuristics. In this chapter, descent-heuristics-based PTS and metaheuristics-based PTS are compared. Results showed that RS-PTS is the best one among descent-heuristics algorithms. Metaheuristics algorithms can also be classified into single solution-based methods and nature-inspired methods. Among metaheuristics algorithms, two natural inspired algorithms and one single solution-based methods, namely PSO, ABC, and SA, were selected to be compared with descent-heuristics algorithms. Results showed that PTS based on nature-inspired methods is better than PTS based on descent heuristics and PTS based on single-solution metaheuristics method.

Performance analysis of hybrid optical amplifiers for multichannel wavelength division multiplexed (WDM) optical networks

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Deepak Malik ◽  
Amit Wason
Keyword(s):  
Optical Networks ◽  
Optical Amplifier ◽  
Wdm Optical Networks ◽  
Long Distance ◽  
Eye Diagram ◽  
Wavelength Division ◽  
Wavelength Division Multiplexed ◽  
High Data ◽  
Data Rates ◽  
Hybrid Optical Amplifier

AbstractHybrid Optical Amplifier (HOA) has made a significant change in Wavelength Division Multiplexed (WDM) optical networks. We have proposed diverse hybrid optical amplifier configurations for the better performance of WDM optical networks. These configurations are SOA-EDFA, EDFA-EDFA and EDFA-Raman amplifier for 24 channels WDM optical networks at 10 Gbps with channel spacing of 0.8 nm. The performance of the systems is evaluated on the behalf of different parameters such as, quality factor, eye diagram, bit error rate and output power. The efforts are made to optimize these parameters. From the results, it is assessed that EDFA-Raman configuration gives superior results as compared to EDFA-EDFA configuration and SOA-EDFA hybrid optical amplifier configuration for long distance. Further it is also observed that EDFA-Raman hybrid optical amplifier configuration is suitable for high data rates up to 20 Gbps.

scholarly journals Performance Evaluation of Coexistence of WiFi and LTE Licensed-Assisted Access to Unlicensed Spectrum using Markov chain Analytical Model

2019 ◽  
Vol 8 (6) ◽  
pp. 2032-2037
Keyword(s):  
Markov Chain ◽  
Performance Evaluation ◽  
System Performance ◽  
Heterogeneous System ◽  
Data Rate ◽  
High Data Rate ◽  
Unlicensed Spectrum ◽  
High Data ◽  
High Bandwidth ◽  
System Performance Evaluation

LTE with the inclusion MIMO renders high data rate, we introduce a model for system performance evaluation considering typical coexistence of LAA LTE and WiFi. Currently, as the need for high bandwidth to satisfy high data rate demanding services increased significantly over the years, the operators are thinking about various answers for incrementing system limit. As the authorized range has been costly, utilizing LTE in the unlicensed spectrum will be a hopeful strategy to oblige trade requirement for versatile information. Expecting that LAA eNBs perform CCA as a similar way to WiFi CSMA, we utilize Markov chain to help assess the influenced execution of WiFi as well as the connection between the joint framework execution and LAA most extreme transmission time. Nonetheless, LTE needs to exist together with different heterogeneous system, particularly WiFi, prior in the unlicensed medium

Sign in / Sign up

Export Citation Format

Share Document