Abid Munir

Coherent Optical Systems: Principles, Contemporary Implementations and Future Challenges for High Data Rate Communication

This paper is a tutorial review for coherent optical communication with emphasis on digital coherent receivers because digital coherent optical receivers are promising solution for next generation optical communication systems. In this paper, principles of coherent communication has been reviewed along with its advantages and prospective modulation formats to achieve 111 Gbps. Digital coherent receivers and their signal processing modules have been reviewed in the light of recent publications and patents. In the end, realization challenges have been addressed from circuit and signal processing point of view.

A Viable Passive Optical Network Design for Ultrahigh Definition TV Distribution

International Telecommunication Union (ITU) has recently standardized ultrahigh definition television (UHD-TV) with a resolution 16 times more than the current high definition TV. An increase in the efficiency of video source coding or in the capacity of transmission channels will be needed to deliver such programs by passive optical network (PON). In this paper, a high capacity integrated PON infrastructure is proposed to overlay ultrahigh definition television by a complete passive coexistence of 10G-PON (XG-PON) and single carrier directly modulated, duo-binary 40G-PON (XLG-PON) signal. The simulation results show error-free transmission performance and further distribution to 32 optical network units (ONUs) on broadcast basis with negligible power penalty over 20 km of bidirectional standard single mode fiber.