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Dive into the research topics where Ryohei Urata is active.

Publication


Featured researches published by Ryohei Urata.


optical fiber communication conference | 2014

What devices do data centers need

Cedric F. Lam; Hong Liu; Ryohei Urata

We discuss the trend in fiber optic technology developments to fulfill the scaling requirements of data center networks.


Archive | 2013

Optical Interconnects for Scale-Out Data Centers

Hong Liu; Ryohei Urata; Amin Vahdat

We review the architecture of modern datacenter networks, as well as their scaling challenges; we then present opportunities and needs for emerging optical technologies to support datacenter scaling.


international conference on group iv photonics | 2012

Silicon photonics for optical access networks

Ryohei Urata; Hong Liu; Cedric F. Lam; Pedram Zare Dashti; Chris Johnson

We highlight promising developments and directions in silicon photonics for realizing cost effective WDM-PON: photonic integration for integrated WDM transceivers at the OLT and widely tunable laser technologies for achieving a high performance, colorless ONU.


Topics in Applied Physics | 2016

Silicon Photonics Technologies: Gaps Analysis for Datacenter Interconnects

Ryohei Urata; Hong Liu; Lieven Verslegers; Chris Johnson

We give an overview of optical interconnect requirements for large scale datacenters. We then make a comparison between silicon photonics technologies and more traditional options in meeting these requirements.


optical fiber communication conference | 2017

Datacenter interconnect and networking: From evolution to holistic revolution

Ryohei Urata; Hong Liu; Xiang Zhou; Amin Vahdat

In this presentation, we will review the evolution of Googles intra-datacenter interconnects and networking over the past decade, then outline future technology directions which, along with a more holistic design approach, will be needed to keep pace with the requirements and growth of the datacenter.


Archive | 2012

Passive optical network with asymmetric modulation scheme

Cedric F. Lam; Hong Liu; Ryohei Urata


Archive | 2012

Fiber diagnosis system for WDM optical access networks

Cedric F. Lam; Ben Warren Segura; Ryohei Urata; Hong Liu


optical fiber communication conference | 2012

High performance, low cost, colorless ONU for WDM-PON

Ryohei Urata; Cedric F. Lam; Hong Liu; Chris Johnson


Archive | 2012

Flexible non-modular data center with reconfigurable extended-reach optical network fabric

Amin Vahdat; Hong Liu; Ryohei Urata; Xiaoxue Zhao; Chris Johnson


Archive | 2011

Aggregation and de-agreggation of bandwidth within data centers using passive optical elements

Hong Liu; Amin Vahdat; Ryohei Urata; Xiaoxue Zhao; Chris Johnson

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