Journal ArticleDOI
Experimental investigation of a digital free-space photonic switch that uses exciton absorption reflection switch arrays
Masayasu Yamaguchi,Tsuyoshi Yamamoto,Ken-ichi Yukimatsu,Shinji Matsuo,Chikara Amano,Yoshinori Nakano,Takashi Kurokawa +6 more
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TLDR
A digital free-space photonic switch structure that uses exciton absorption reflection switch (EARS) arrays that may be applicable to large-scale, multistage switching networks for optical interconnections and broadband telecommunication switching systems.Abstract:
We present a digital free-space photonic switch structure that uses exciton absorption reflection switch (EARS) arrays. The network topology of the switch is a banyan network. This switch structure uses microbeam interconnections to realize a compact switch fabric. The low-loss interconnection that is necessary for high-speed operation can be achieved by the use of an optical system based on birefringent plates. A prototype switch (based on an 8 × 8 EARS array) with fiber array pigtails is fabricated and used to demonstrate two-input, two-output switching of 8-Mbits/s signals. This digital switch may be applicable to large-scale, multistage switching networks for optical interconnections and broadband telecommunication switching systems.read more
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Journal ArticleDOI
Cathodoluminescence and electron beam induced current study of partially relaxed AlGaAs/GaAs/InGaAs heterojunction phototransistors under operating conditions
O. Sjolund,H. T. Lin,Daniel H. Rich,M. Ghisoni,Anders Larsson,Shumin Wang,J. Thordsson,Thorvald Andersson +7 more
TL;DR: In this paper, the authors studied time-resolved cathodoluminescence (CL) and electron beam induced current (EBIC) on AlGaAs, GaAs/GaAs/InGaAs heterojunction phototransistors under operating conditions, i.e., at room temperature and under bias.
Journal ArticleDOI
Performance comparison between multiple-quantum-well modulator-based and vertical-cavity-surface-emitting laser-based smart pixels
TL;DR: This work compared multiple-quantum-well modulator-based smart pixels and vertical-cavity-surface-emitting laser (VCSEL) based smart pixels in terms of optical switching power, switching speed, and electric-power consumption.
Patent
Liquid crystal microprism array, free-space optical interconnector, and optical switch
TL;DR: A liquid crystal microprism array has a plurality of grooves formed on a surface of a transparent substrate, and spaces divided by the ridges of the grooves as mentioned in this paper.
Journal ArticleDOI
Optical computing and interconnects
T. Yatagai,S. Kawai,H. Huang +2 more
TL;DR: Examples of technologies used in an analog computing system, a technique for the optimal design of coherent phase-only spatial filters, and a new version of incoherent filtering are presented.
Journal ArticleDOI
Broadband 2 × 2 free-space optical switch using electronically controlled liquid lenses
TL;DR: In this paper, a liquid lens technology-based 2 × 2 free-space optical switch using a pair of Electronically Controlled Variable Focus Lenses (ECVFLs) is proposed.
References
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Journal ArticleDOI
Stacked planar optics: an application of the planar microlens
TL;DR: This paper presents a new development of the distributed-index planar microlens of 2.5-3-mm focal length and 0.15 N.A. and shows that it is usable with optical components in fiber communications and proposes a concept of stacked planar optics consisting of a stack of arrayed planarmicrolenses and other optical components.
Journal ArticleDOI
Optical Interconnections Using Microlens Arrays
Frederick B. McCormick,F. A. P. Tooley,Thomas J. Cloonan,Jose M. Sasian,Harvard Scott Hinton,Keith O. Mersereau,Avi Y. Feldblum +6 more
TL;DR: Free-space interconnection of widely spaced pixels may be implemented using microlenses, rather than conventional imaging, to provide real-time information on system capacity.
Journal ArticleDOI
Experimental investigation of a free-space optical switching network by using symmetric self-electro-optic-effect devices
Frederick B. McCormick,F. A. P. Tooley,Thomas J. Cloonan,J. L. Brubaker,Anthony L. Lentine,Rick L. Morrison,Stephen J. Hinterlong,M. J. Herron,Sonya L. Walker,Jose M. Sasian +9 more
TL;DR: A prototype digital free-space photonic switching fabric that consists of three cascaded 16 x 8 arrays of symmetric self-electro-optic-effect devices that are used as logic gates that implement part of a multistage interconnection network is demonstrated.
Journal ArticleDOI
An all-optical implementation of a 3-D crossover switching network
Thomas J. Cloonan,M. J. Herron,F. A. P. Tooley,Gaylord W. Richards,Frederick B. McCormick,E. Kerbis,J. L. Brubaker,Anthony L. Lentine +7 more
TL;DR: In this article, a large-scale cascadable implementation of the optical crossover network that capitalizes on planar symmetric self electrooptic effect device (S-SEED) arrays is discussed.
Journal ArticleDOI
Novel photonic switch arrays consisting of vertically integrated multiple-quantum-well reflection modulators and phototransistors: excitation absorptive reflection switch
TL;DR: The exciton absorptive reflection switch (EARS) as discussed by the authors is a three-terminal switch array with a high contrast ratio and optical gain, which consists of vertically integrated GaAs/AlGaAs multiplequantum-well modulators and GaAs heterojunction phototransistors, which are optically isolated and electrically connected in series with distributed Bragg reflectors.