Photon-Induced Waveguides for All-Optical Switching and Wavelength Conversion

Byongjin MA  Masumi SAITOH  Yoshiaki NAKANO  

IEICE TRANSACTIONS on Electronics   Vol.E83-C    No.10    pp.1683-1686
Publication Date: 2000/10/25
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Optoelectronics
photon-induced waveguide (PIG),  guiding/antiguiding,  all-optical digital wavelength converter,  optical switching,  semiconductor optical amplifier (SOA),  

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A photon-induced waveguide (PIG) for all-optical switching and wavelength conversion with the functionalities of regeneration and reshaping is proposed. Optical signals are used to switch between lateral optical wave guiding and antiguiding effects. A transfer-matrix method was developed to consider not only the variation of optical signal power along the waveguide, but also the spatial distributions of refractive index and optical confinement factor to explain the switching scheme between guiding and antiguiding. Theoretical analyses show that a threshold-like and sharp input-output response of PIG allows enhancement of the extinction ratio, reshaping, and thus enlargement of noise margin of optical signals in digital all-optical switching and wavelength conversion.