Optical-orthogonal frequency division multiplexing-review

Abstract

We have witnessed a drastic increase in Orthogonal Frequency Division Multiplexing (OFDM) in optical community in recent years. OFDM is a type of signal modulation. OFDM divides high data rate modulating stream into many slow modulated narrowband subcarriers. Thus, it is less sensitive to frequency fading. OFDM is used for many of the latest wireless and telecommunications. OFDM technique is used in Digital Audio Broadcasting (DAB), HDTV, Wireless LAN. In OFDM the spectrum of individual subcarrier is overlapped with minimum frequency spacing, which is carefully designed so that each subcarrier is orthogonal to each other. In the 1980s, OFDM was studied for high speed modems digital mobile communication, and high recording. This paper deals with the Review of optical OFDM.