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Proceedings Paper

Fault tolerant all-optical router with photorefractive all-optical switch
Author(s): Toshiya Kaino; Atsushi Okamoto; Satoshi Honma
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Paper Abstract

We propose a new type of the fault tolerant all-optical router (FTAR) by using an all-optical switch with photorefractive two-wave mixing. FTAR can detect a cutoff of a main transmitting line and automatically reroute a signal beam from the main line to a backup line. These functions can increase communication reliability of optical wireless. FTAR is composed of ony all-optical devices without any electronic devices or any mechanical operations. In the new type of FTAR, the routing of the signal beam is controlled by a control beam transmitting on the main line from a different light source at a receiver in the opposite direction with the signal beam. Compared with the previous type of FTAR composed of two photorefractinve crystals, the new configuration offers the simplification of the construction and high transmission efficiency of the signal beam. In this report, we experiment on the FTAR by usign a BaTiO3 and Ar+ laser whose wavelength is 514.5nm, and confirm the fundamental fucntin of FTAR. We give comparison of the result with the numerical analysis. We also analyze the dependence of the switching time on the input beam intensity of the crystal by a numerical analysis and an experiment.

Paper Details

Date Published: 8 August 2003
PDF: 7 pages
Proc. SPIE 5123, Advanced Optical Devices, Technologies, and Medical Applications, (8 August 2003); doi: 10.1117/12.517020
Show Author Affiliations
Toshiya Kaino, Hokkaido Univ. (Japan)
Atsushi Okamoto, Hokkaido Univ. (Japan)
Satoshi Honma, Hokkaido Univ. (Japan)


Published in SPIE Proceedings Vol. 5123:
Advanced Optical Devices, Technologies, and Medical Applications
Janis Spigulis; Janis Teteris; Maris Ozolinsh; Andrejs Lusis, Editor(s)

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