OPTICAL BRANCHING COMPONENT WITH LOW POLARISATION SENSITIVITY

An optical branching component particularly suitable for use as a tap device is described. The component has two optical waveguides in proximity with one another in at least two regions so as to form at least two adjacent directional couplers, and between the two directional couplers there is an eff...

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Bibliographic Details
Main Authors BULTHUIS, HINDRICK FREERK, BEELEN, GUNTER, VLIET, FREDERIK MARCEL, VAN DER, PANDAVENES, SUAREZ JAIME
Format Patent
LanguageEnglish
French
German
Published 11.05.2005
Edition7
Subjects
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
PHYSICS
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Summary:An optical branching component particularly suitable for use as a tap device is described. The component has two optical waveguides in proximity with one another in at least two regions so as to form at least two adjacent directional couplers, and between the two directional couplers there is an effective optical path length difference between the two waveguides. The coupling strength of each of the two adjacent directional couplers monotonically decreases with increasing wavelength in the operational wavelength region of the component. This means couplers with relatively large coupling strength and relatively low polarisation dependent loss can be used in the component, giving low polarisation dependent variation in the tap ratio, particularly for small tap ratios.
Bibliography:Application Number: EP20030712343