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The performance of a variable optical delay circuit that employs a fiber loop with highly nonlinear fiber parametric wavelength converters is discussed using both experiments and simulations. In our optical delay circuit, the delay time is determined from the number of circulations, which is controlled by the initially selected wavelength of the optical signal. We discuss the factors that limit the number of circulations described in our previous paper, derive the parameters that provide good performance levels, and confirm the performance by simulation. The simulated results indicate that 100 wavelength conversions can be achieved, namely, 100 different delay times can be given to optical packets. [ABSTRACT FROM PUBLISHER]

We have developed an arrayed-waveguide-grating-based wavelength router with a loop-back structure for a system with nonuniformly distributed traffic. We describe the design principle with particular regard to the loop-back waveguide connections, and discuss its optical routing functions with some experimental results. [ABSTRACT FROM PUBLISHER]

We have developed an arrayed-waveguide-grating (AWG)-based wavelength router with unequal transmission bandwidths for a system with nonuniformly distributed traffic. To realize the router, we designed the aperture width of the input-output waveguides at the border of the slab waveguide. We applied this AWG router to a physical star and logical full-mesh wavelength routing system, and we could create different numbers of paths between the nodes to correspond to the traffic demand [ABSTRACT FROM PUBLISHER]