Fully adjustable optical limiter for fiber optics using nonlinear silicon films

A fully adjustable self-limiter and optical clamp in a geometry suitable for use in a fiber optics context is demonstrated. Edge-coupled light into a silicon thin film on a doped silicon substrate lowers the refractive index of the guiding film and eventually brings it to the cutoff condition. Furth...

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Bibliographic Details
Published in:Applied physics letters 1989-05, Vol.54 (19), p.1836-1838
Main Authors: NORMANDIN, R, HOUGHTON, D. C
Format: Article
Language:English
Subjects:
Applied sciences
Circuit properties
Electric, optical and optoelectronic circuits
Electronics
Exact sciences and technology
Optical and optoelectronic circuits
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Summary:A fully adjustable self-limiter and optical clamp in a geometry suitable for use in a fiber optics context is demonstrated. Edge-coupled light into a silicon thin film on a doped silicon substrate lowers the refractive index of the guiding film and eventually brings it to the cutoff condition. Furthermore, by varying the amount of light incident on the nonlinear substrate and the nonlinear film waveguide, a fully adjustable limiting action is obtained. It is shown that absorption effects are not important at power levels compatible with fiber optics, making the limiter highly damage resistant.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.101251