Author : Monika Srivastava ,Mukesh Kumar , A.K.Jaiswal, Anil Kumar and Rohini Saxena

Optical time division multiplexing (OTDM) extend and expend is well known techniques of Electrical time division multiplexing into optical domain. In OTDM optical streams are constructed by time multiplexing a number of lower bit rate optical streams. In this paper we present an overview of our recent work show the multiplexing and demultiplexing of incoming data. In this lowerbits (10GBits/S )constructed to a higher bits i.e. (40GBits/s) by multiplexing process. The pulses streams are delayed with respect to one another using delay element . The Delay streams in picosecond order. The demultiplexer reconstructs the bit streams at the original bit rate(10 GBits/s ) by separating bits in the multiplexed streams. The bits are transmitted over long distance using single fiber . In this paper we verified by the results that at the receiver end each bits are seperated and show their property such as Q factor, Power , Wavelength etc. Also show the Power Penality which show as well as distance is increased power penality decreased meanes at the receiver end the noise is decreased. Data is transmitted 80 KM using singlemode fiber.

Keywords: A M Modulator, NRZ Pulse, Multiplexer , Demultiplexer, loopcontrol , EDFA, Clock Recovery

Article published in International Journal of Current  Engineering  and Technology, Vol.4,No.3 (June- 2014)