34 Page 34-48 © MANTECH PUBLICATIONS 2019. All Rights Reserved Journal of Electronics and Optical Communication Engineering Volume 4 Issue 1 “A Comparative Study for Different Mode of Data Transfer” Sumanta Karmakar*, Khushi Banerjee*, Mousumi Dhar, Spondita Ghosh, Prithiraj Nandan Asansol Engineering College, Asansol Corresponding author’s email id: sumanta.karmakar@gmail.com * DOI: http://doi.org/10.5281/zenodo.3241788 Abstract Data transfer is the need of today’s world and for this; people using internet through Personal Computers (PCs).The PC to PC communication can be performed either in the electrical domain or in optical domain. The aim of this paper is to understand “PC to PC Laser Communication” through fiber-the requirement of different components and related configuration. Keywords: Data transfer, Personal Computers (PCs), Laser Communication, Optical Communication INTRODUCTION Communication is the transfer of information from one place to another. Block diagram for communication system is shown in Figure 1.1. The main components of communication are Transmitter, Channel or Medium and Receiver. To establish communication, the signal or message is converted into system’s compatible format using transducer, then transmitted by compatible transmitter and then the signal or message received through channel or medium at the receiver point, finally the received signal or message is again converted to its original form using compatible transducer.(See Figure:-1) BASICS OF OPTICAL COMMUNICATION Charles Kao & Charles Hockham (Standard Telecommunication Laboratory in England) in 1966 first cited that Optical Fiber communications is possible. They stated that the optical fiber of loss 20 dB/km could replace the coaxial cable. Wave length of light is shown in the figure 2