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We present a wavelength-tunable band-pass filter composed of multi-stage cascaded asymmetric Mach-Zehnder interferometers. The fabricated seven and eight-stage filters exhibit full tunability in the C-band, and 3 dB on-chip loss, and 0.27 nm (33 GHz), 0.14 nm (18 GHz) bandwidth respectively.
We propose a novel optical switch configuration that utilizes erbium-doped fiber amplifiers (EDFAs) and asymmetric-port-count cyclic arrayed-waveguide gratings (AWGs). By optimizing the number of utilized input ports of the cyclic AWGs, our proposed scheme can reduce total switch loss and hence relax requirements for EDFAs in terms of gain and maximum output power. To verify effectiveness of the proposed...
We propose novel large-scale optical-switch architectures that utilize delivery and coupling (DC) switches and wavelength routing (WR) switches based on the cyclic arrayed-waveguide gratings (AWGs). To suppress the passband-frequency deviation inherent in cyclic AWGs, we propose two-stage WR structures in which multiple small-scale cyclic AWGs are cascaded to create a large-scale WR switch. We introduce...
Applying optical switching to datacenter networks will increase network bandwidth and reduce power consumption while meeting the explosive traffic increase. Two of the critical attributes of optical switches are scalability and cost effectiveness. The wavelength routing switch offers the solution to the development of large port count optical switches.
Hierarchical optical networks will be a viable solution in creating large-scale networks of the future. The networks control optical network resources in granularity of both wavelength and waveband that consists of a fixed number of wavelengths; thereby, they can reduce signalling processing load and efficiently create virtual private networks. Meanwhile, as the network scale increases, multi-stage...
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