Proc. SPIE. 7988, Optical Transmission Systems, Switching, and Subsystems VIII
KEYWORDS: Signal to noise ratio, Multimode fibers, Digital signal processing, Modulation, Multiplexing, Computer programming, Monte Carlo methods, Telecommunications, Antennas, Fiber optic communications
This paper proposes a dual space diversity technique using both Space Time Block Code (STBC) and mode group
diversity multiplexing (MGDM) in an 10 Gbit/s 1km long optical multi-mode fiber (MMF)communication system. The
simulation results demonstrate that the system based on STBC+MGDM achieves better performance than that only
employing MGDM in the current system.
A simple low-cost wavelength-shared WDM-PON (Wavelength-Division Multiplexing Passive Optical
Network) system using star-shaped optical fiber couples, one tunable laser, AWG (Array Waveguide Gating)
is proposed in this paper. In this simple architecture, a
star-shaped optical fiber couple and a tunable laser are
used for 32 sources to reduce the cost dramatically. Comparing with the normal OLT(Optical Line Terminal)
controlling ONU(Optical Network Unit) software method, a hardware wavelength collision test method to
avoid the wavelength collision for upstream channels is used in the novel system which can reduce delay
time for upstream channels. Transmission tests show that the system and the method are efficient which are
useful in FTTH(Fiber to Home).
This paper presents a novel optimized distributed dynamic wavelength assignment algorithm for the wavelength routing optical network(WRON) based on the revised result of reference[5,6]: Fast Distributed Dynamic Lightpath Setup Algorithm(FDDLSA). By adopting two kinds of new optical link release mechanisms (ahead and timeout release) in the process of networks nodes setting up a link, the new algorithm can reduce the blocking probability significantly and release the burden of a router. The effectiveness of the algorithms was verified through the simulation on NSF net (Nature and Science Foundation) of USA: it can reduce the blocking probability 8% less than reference ’s algorithm, at the same time it can reduce the optical path setup time greatly.