Physical layer technologies for optical burst-mode add-drop multiplexing system

Abstract

Physical layer technologies for an optical burst-mode add-drop multiplexing (OB-ADM) system are proposed to realize an OB-ADM ring network which has been introduced as a practical application of wavelength-division-multiplexed (WDM) optical burst switching (OBS) technologies. In OBS networks, the power of an optical channel fluctuates because optical bursts (OBs) of sub-millisecond in length are generated occasionally. The OBs result in abrupt amplitude changes in input and output signals of optical communications devices. Thus, the OBS network requires stringent devices, e.g., optical transmitters, receivers, and amplifiers that support the burst-mode operation. Another typical feature of the OBS network is that it sends control packets ahead of the corresponding OBs to secure the enough time for control packet processing and to eliminate needs for optical buffers. Thus, stable processing of the control packets is essential to the OBS network. Also, the OBS network requires faster optical switching than circuit-switched networks because of the short length of OBs. Therefore, this dissertation describes physical layer technologies such as stable control packet processing, fast optical switching, burst-mode transmission, amplification, and receipt which are essential to realize the OB-ADM system. New schemes for each technology are proposed and applied to the system. For the control packet processing, existing optical header generation and processing technologies can be utilized because they can be applied to the OBS network by adoption of the offset time. In this dissertation, carrier-suppressed second harmonic subcarrier-multiplexing (CS-SH-SCM) and wavelength-offset polarization division multiplexing (PDM) are proposed as robust in-band signaling techniques. A dedicated channel allocation is also proposed as a practical out-of-band signaling technique. A burst control packet (BCP) must be strong to the burst-mode operation or crosstalks to deliver payload ...