Analysis of In-band Transmission of Baseband and Broadcast Signals for Next Generation WDM-PON

Abstract

This research was conducted to deal with the problem of finding cost-effective solutions for Fiber-to-the-Home (FTTH) network deployment. In the FTTH network, the transceiver at the user premises and the deployment of fiber at the last mile are the major barriers. A novel approach is demonstrated for the ultimate solution to ensure large bandwidth, wavelength independency, easy upgradability and excellent network security. A single wavelength can be shared by both the baseband and broadcast data where the system utilizes the subcarrier multiplexing (SCM) signals for broadcasting service and finally combined with baseband data to modulate a single optical source. This approach simplifies the design of optical line terminal (OLT) and meets the future bandwidth demand. In this project work, a wavelength reuse bidirectional WDM-PON is proposed for the transmission of both baseband and broadcast data in single wavelength. Broadcasting signals are generated in different radio frequencies (RF) to meet the diverse applications in both residential and commercial networks. Since the broadcast signals are placed in-band to the baseband data, the propose system does not require additional bandwidth dedicated for broadcast transmission. Moreover, the combined signal is received by a single photodiode and recovers the corresponding data without any wavelength specific optical or electrical filter. Beside this, wavelength reuse architecture ensure maximum utilization of available wavelengths and simplify the 'colorless' operation of upstream/downstream transmission.