Earticle

The need of high performance and high range devices is increasing drastically as rapid growth is accumulating in Information and communication technology (ICT). In Gb/s transmission system high speed optical transmitter requires high power for transmitting information at long distance. The high power transmitters consumes enormous power and exhibits heating effect in devices, leakage power problems as well due to that the device response became slower. In this work, high performance and high range design of 100Gb/s optical DPSK transmitter is designed in 20 nm Field Programming Gate Array (FPGA) using multiple IO standards. The high performance and high range design is achieved using proposed technique by integrating the two IO Standards one is Pseudo Open Drain (POD) and other is Point- to- Point Differential Signaling (PPDS). The POD IO standards is consuming less power feature, while PPDS IO Standard provides the faster response time. It is determined that using proposed technique the 95% power consumption is recorded with 85% improved efficiency in response time for mid-range infrared frequencies such as 200 GHz, 500 GHz, 90 GHz, 5 THz and 20 THz. The designed energy efficient optical transmitter can be assimilate with further optical components in optical communication systems to high performance and high range future generation networks.

In this paper, laser driver circuit is designed using current mode logic for safe mode interface of laser with devices attached ahead. Furthermore, energy efficient design is realized on FPGA virtex-6 using Low Voltage Differential Signaling technique. The energy efficient design is tested on Hyper Transport Protocol IO standard on FPGA that includes HTP 1.1, HTP 2.0, HTP 2.5, HTP 3.0 and HTP 3.1 having operating frequencies 1 GHz, 10 GHz, 100 GHz, 1 THz and 10 THz respectively. In LVDS, the four voltage swing values are taken2.5V, 1.2V, 0.9V and 0.3V. Laser driver is operated at mentioned hyper transport protocols for each voltage swing value. It is extracted that when laser driver is operated at all HTPs on voltage swing 0.3V; the maximum power reduction is recorded. For HTP 1.1. 87%, for HTP 2.0. 85%, for HTP 2.5. 85%, for HTP 3.0. 86% and for HTP 3.1. 86% power reduction is recorded at LVDS voltage swing 0.3V in comparison with LVDS voltage swing 2.5V. The main contribution of this work is that energy efficient design of laser driver is proposed that consume less power when signal is transferred at different protocols having high frequenciesusing LVDS technique.This laser driver will be integrated with other optical components in system to provide green optical communication. The design is demonstrated using Xilinx 14.3 software package.