Optical waveguides – With optical coupler – Plural
Reexamination Certificate
2007-02-13
2007-02-13
Sanghavi, Hemang (Department: 2874)
Optical waveguides
With optical coupler
Plural
C385S017000, C385S018000, C385S033000, C359S248000
Reexamination Certificate
active
11174041
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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Ross John R.
Sanghavi Hemang
Trex Enterprises Corp.
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