Porous silicon filter for wavelength multiplexing or de-multiplexing
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United States of America Patent
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Feb 13, 2007
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app pub date -
Jun 29, 2005
filing date -
Oct 2, 2003
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Abstract
A porous silicon filter for wavelength multiplexing and de-multiplexing. Preferred embodiments include rugate-type porous silicon filters with pores having continuously varying widths with pore depth an optical cross connect switch. In other preferred embodiments, the pores are filled with a material that changes index of refraction with changes in applied voltage, current or temperature. Important applications of these porous silicon filters are for multiplexing and de-multiplexing in fiber optic communication systems. For example, a preferred embodiment is an all optical fiber optic switch utilizing these filters.
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