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We propose a novel delay line interferometer and demonstrate its application to in-band OSNR monitors integrated with wavelength selective switches (WSSs). The WSS-integrated monitors are capable of detecting OSNR with 1.2-dB accuracy.
We propose a compact transponder aggregator (TPA) consisting of a wavelength selective switch (WSS) array and a direction switch array. It has no intrinsic splitting loss and therefore the number of ports can exceed that of a conventional multicast switch. A waveguide-based frontend that incorporates spatial beam transformers enables us to increase the number of ports and integrate multiple WSSs in...
We demonstrate a compact 8 × 8 broadcast-and-select wavelength cross connect with add/drop ports for 8-degree node. A combination of waveguide-based frontend and free-space optics allows us to integrate eight arrays of 1 × 8 WSSs and 1 × 8 splitters into a small footprint.
We propose an optimal variant of an M × N wavelength selective switch (WSS) for a transponder aggregator. A PLC frontend enables us to integrate an M array of 1 × N WSSs and port selection switches in simple optics. A high-port count (8 × 24) prototype is demonstrated.
Dielectric charging of MEMS micromirrors causes tilt angle drift, which is a major reliability problem for telecom applications. In this paper, we propose a physical model of angle drift in a MEMS mirror system considering surface charge motion on dielectric oxide. Good agreement is obtained between the model calculation and experimental results, which suggest that angle drift can be predicted by...
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