Bhagwan Das ¹, M.F.L. Abdullah ¹, Nor Shahihda Mohd Shah ¹, B. S. Chowdhry ², Dil Muhammad Akbar Hussain ³

Affiliations
1 Faculty of Electrical and Electronic Engineering, Universiti Tun Hussein Onn, MY
2 Faculty of Electrical, Electronic and Computer Engineering, Mehran University of Engineering, Technology, Jamshoro, PK
3 Aalborg Aalborg University, DK

Abstract

Information and Communication Technology (ICT) is growing rapidly, and ICT devices are consuming plenty of energy, for communication systems. In Gb/s transmission system high range and high- speed optical transmitter requires high power for transmitting information at long distance. The existing techniques are consuming vast amount of power, exhibits heating effect, and leakage power problems for optical transmitter of 40 Gb/s or more. In this work, an energy efficient 100Gb/s optical DPSK transmitter is designed using UltraScale Field Programming Gate Array (FPGA). The design is realized by controlling the impedance of 100Gb/s optical DPSK transmitter using Digitally Controlled Impedance (DCI) IO (Input/ Output) Standards available on UltraScale FPGA. It is determined that 80% power is reduced using designed 100Gb/s optical DPSK transmitter, for 100 GHz, 300 GHz, 900 GHz and 12 THz using High Speed Low Voltage DCI (HSLVDCI_15) IO Standard compared to optical transmitter design without IO Standard. Furthermore, using designed system 90% leakage power is also reduced. The designed energy efficient optical transmitter can be interfaced with other optical components, to provide the green optical communication.

Keywords

Differential Phase Shift Keying (DPSK), Energy Efficient, Field Programming Gate Array, Laser Signal, Non-Return-to-Zero Modulation, Optical Transmitter.

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Bhagwan Das ¹, M.F.L. Abdullah ¹, Mohd. Shah Nor Shahida ¹, Qadir Bakhsh ¹

Affiliations
1 Universiti Tun Hussein Onn Malaysia (UTHM)

Abstract

In optical communication systems, semiconductor lasers are widely in use as an optical source but the performance of laser are limited due to temperature variation, design incompetency, and power consumption issues. The direct output of semiconductor laser may destroy the additional component attached in the system. In this research, semiconductor laser, driver is implemented by utilizing the current mode logic technique to control the output of semiconductor laser. Current Mode Logic (CML) is one of the compatible technique to work integeratedly with optical components. CML based design of semiconductor laser driver has achieved the current ranges from 5.6 mA to 6.8 mA and efficiently working up to 10 GHz frequency and consume 75% less power than typically available laser drivers. In future, the semiconductor laser may have implemented using System on Chip (SoC) configuration to make the design more energy efficient, in terms of temperature sensitivity and power consumption.

Keywords

Current Mode Logic, Driver Circuits, N-Metal Oxide Semiconductor Transistor, Semiconductor Lasers, Switching Efficiency

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