Yasuaki Hashizume

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An in-band optical signal-to-noise ratio (OSNR) monitor is proposed, based on an instantaneous polarization state distribution analysis. The proposed monitor is simple, and is applicable to polarization division multiplexed signals. We fabricate a high-speed Stokes polarimeter that integrates a planar lightwave circuit (PLC) based polarization filter,(More)
This paper proposes a 40Gbit/s-class-λ-tunable WDM/TDM-PON for flexible photonic aggregation networks that achieves the aggregation of a large number of users using the DWBA algorithm without an L2-SW. It also clarifies the scalability of the proposed system in terms of the transmission distance and the number of users. A λ-switching transmission experiment(More)
We propose a high power -tunable burst-mode transmitter with an output of over +10 dBm using a synchronized gain-clamping booster SOA, and demonstrate a 40-dB loss budget and 40-km reach symmetric 40-Gbit/s -tunable WDM/TDM-PON. 1. Introduction Recently, time division multiplexing (TDM)-based high speed optical access system of 10G-EPON and XG-PON has(More)
We propose a cyclic NxN AWG router that can multi/demultiplex upstream and downstream signals with different channel spacings in different wavelength regions. We fabricated a 4 x 4 AWG router for our novel λ-tunable WDM/TDM-PON using silica-based PLC technology and showed that it can cyclically multi/demultiplex both 20 nm-spaced and 200 GHz-spaced signals(More)
This paper describes two kinds of on-chip matched low-noise/driver MMIC amplifiers (LN/D-As) suitable for 2.4 GHz and 5.2 GHz short-range wireless applications. The successful use of the current-reuse topology and interdigitated capacitors (IDCs) enables sufficiently low-noise and high output power operations with low current dissipation despite the chip(More)
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