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To utilize network resources effectively and guarantee the system reliability in Internet exchanges (IXs) in the future, the use of photonic IXs that employ optical cross connects and generalized multiprotocol label switching is considered. This paper presents a theoretical and experimental study of link-capacity adjustment for a photonic IX employing a statistical-decision method for traffic monitoring. We present parameter estimation of the statistical-decision method in detail considering the traffic characteristics in IXs. Then, experiments on the link-capacity adjustment are presented. The first experiment shows the link-capacity adjustment of an optical path to evaluate path addition from one path to two and path deletion from two optical paths to one. The second experiment shows the link-capacity adjustment using multiple paths. We confirmed that there is no packet/frame loss in either experiment during the transmission of demo traffic, which simulates daily traffic changes. [ABSTRACT FROM PUBLISHER]

We demonstrate the polarization-insensitive operation of a Mach-Zehnder interferometer (MZI)-based lithium niobate switch with a silica waveguide polarization beam splitter. The splitter is composed of an MZI with a half wave plate installed in one arm, and exhibits a polarization extinction ratio of more than 15 dB. The switch functions for both polarizations with an extinction ratio of more than 20 dB, a polarization-dependent loss of 0.1 dB and a switching speed of 40 ps. [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]

We propose and demonstrate a CWDM full-mesh wavelength-routing system with an asymmetric physical star topology. We design a wavelength router to optimize this topology in which the node distances from the wavelength router are unequal. In addition, the router utilizes all the wavelengths making it possible to increase the maximum number of nodes in the system. The routing function is confirmed experimentally using transceivers with two different optical budgets [ABSTRACT FROM PUBLISHER]

A timing pulse generator that extracts the first pulse of a packet and uses it in a pattern-matching optical label processor is proposed. The label processor is demonstrated in a 1 × 2 optical packet switching system. The packet switching system operation was polarisation independent for 10 Gbit/s packets. [ABSTRACT FROM AUTHOR]