Flat top optical filtering component

Optical communications – Multiplex – Wavelength division or frequency division

Reexamination Certificate

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Details

C398S079000, C398S082000, C398S083000, C398S084000, C398S086000, C398S087000, C398S088000, C398S042000, C398S043000, C398S147000, C398S149000, C398S158000, C398S159000, C385S024000, C385S037000, C385S039000, C385S027000, C385S014000, C385S015000, C385S031000, C385S033000, C385S034000, C385S047000, C359S577000, C359S589000, C359S590000, C359S587000, C359S260000, C359S580000, C359S583000, C359S633000, C359S634000, C372S020000, C372S098000, C372S099000, C372S043010

Reexamination Certificate

active

07394986

ABSTRACT:
The invention relates to wavelength-selective optical filters for allowing light of a narrow optical spectral band, centered around a wavelength (λc) to pass through them, while reflecting the wavelengths lying outside this band. According to the invention, the transfer function (T1,2(λ)) of the component is defined by multiplying two transfer functions of spectrally offset Fabry-Perot filters.

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Tsuda H et al: “Polarisation independent tunable liquid-crystal Fabry-Perot interferometer filter module with double-pass configuration”, May 11, 1995 Electronics letters, IEE Stevenage, GB vol. 31, No. 10.
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