Recent progress in ultrafast photonics is reviewed with special emphasis on the research and development activities in Japanese research institutions in the field of optical communication and related measurement technologies. After summarizing the physical natures of ultrashort optical pulses, selected topics are reviewed on such as (1) ultrahigh-bit-rate optical communication employing the com...

In a network, multiple links are interconnected by means of switches. A switch is a device with multiple input and output links, and its job is to move data from the input links to the output links. In this thesis, we focus on a number of fundamental issues concerning the quality of service provided by electronic and optical switches. We discuss various mechanisms that enable the support of qua...

All-optical switches are among the most important parts of integrated photonics. Ultrahigh speed and ultralow energy consumption two necessary indexes all-optical switches. Traditionally, based on concepts such as micro-ring resonators, surface plasmon polaritons, photonic crystals, metamaterials. However, platforms cannot satisfy demand for high performance To overcome limited response time co...

We report multifunctional integrated photonic switches that provide optical wavelength conversion across the C-band at 3.5 Gb/s that is electrically packet-switched within a reconfiguration time of <2.5ns. These switches also provide optical packet-switching in <300ps. © 2005 Optical Society of America OCIS codes: (250.3140) Integrated optoelectronic circuits; (060.2330) Fiber optics communicat...

Optical space switches are important subsystems in optical crossconnects (OXCs) and reconfigurable optical add/drop multiplexers (R-OADMs), while also having applications in more long-term communications scenarios, such as optical packet switching. This chapter develops the theory of operation of planar optical space switches, and illustrates the interrelationship that exists between device cha...

In packet switched optical network, packet header extraction and processing in alloptical domain is a challenging task. In this paper we propose a new all-optical header extraction scheme based on the versatile all-optical ultrafast symmetric Mach-Zehnder (SMZ) switch and pulse position modulation (PPM) for 80 Gb/s data rate. In SMZ switches, the residual power residing outside the switching wi...

DESIGN OF ROUTERS FOR OPTICAL BURST SWITCHED NETWORKS by Jeyashankher Ramamirtham ADVISOR: Professor J. Turner August, 2004 Saint Louis, Missouri Optical Burst Switching (OBS) is an experimental network technology that enables the construction of very high capacity routers using optical data paths and electronic control. In this dissertation, we study the design of network components that are n...

\Sunshine: A high peformance self-routing broadband packet switch architecture," Proc. 17] M. Kondo, et al., \High-speed optical time switch with integrated optical 1 4 switches and single polarization ber delay lines," Technical Digest, Intl. \Serial array time slot inter-changers and optical implementations, 25 Both networks preserve frame integrity and can handle synchronous TDM input stream...

We demonstrate how slow group velocities of light, which are readily achievable in photonic-crystal systems, can dramatically increase the induced phase shifts caused by small changes in the index of refraction. Such increased phase sensitivity may be used to decrease the sizes of many devices, including switches, routers, all-optical logical gates, wavelength converters, and others. At the sam...