Double-stage acousto-optical waveguide device, having polarization-independent response
AssigneePirelli Cavi S.p.A.
InventorsSalvatore Morasca, Steffen Schmid
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Abstract
A double-stage acousto-optical waveguide device comprises two polarization conversion stages, a polarization selective input element, a polarization selective output element and two intermediate polarization selective elements that have two branches connected together and two branches not connected together that are located on opposite sides of the branches connected together and extend in lateral waveguides that reach the edges of the substrate.
Claims11
A double-stage acousto-optical waveguide device, having polarization-independent response, comprising a substrate of birefringent and photoelastic material, on which there are formed:
- a) a first and a second stage of polarization conversion of at least one optical signal having a preselected wavelength in a predetermined interval,
- b) a polarization selective input element and a polarization selective output element made in optical waveguide, respectively associated at input with said first polarization conversion stage and at output with said second polarization conversion stage,
- c) a first and a second intermediate polarization selective element made in optical waveguide, associated at output with said first polarization conversion stage and at input with said second polarization conversion stage, respectively, said intermediate polarization selective elements having two branches connected together and two branches not connected together,
- characterized in that
- d) said two branches not connected together of said intermediate polarization selective elements are located on opposite sides with respect to said branches connected together, and
- e) at least one of said two branches not connected together extends in a first lateral optical waveguide that reaches an edge of said substrate.
Dependencies are inferred from the claim text.