Abstract: Integrated optical waveguide interferometer for evanescent sensing of chemical and/or physical quantities, comprising a substrate carrying a waveguide layer structure provided with: —a first waveguide core layer sandwiched between two first cladding layers formed by a first lower and a first upper (6) cladding layer, of a lower refractive index than the first waveguide core layer, —a second waveguide core layer sandwiched between two second claddings layers formed by a second lower and a second upper (6) cladding layer, of a lower refractive index than the second waveguide core layer, —a splitter (2) and a combiner (5) for optically coupling said first and second waveguide core layers at first and second junctions, respectively, characterized by —a modulation section of a polymer cladding material (9) included in one of the first upper cladding layers (6) and/or included in one of the second upper cladding layers (6), the polymer cladding material covering an identifiable area of said first waveguide core lay

Abstract: The invention relates to an integrated optical waveguide evanescent field sensor (1) for sensing of chemical and/or physical quantities, comprising a substrate (2) carrying a waveguide layer structure provided with—a waveguide core layer (10) sandwiched between two cladding layers (11, 12) formed by a lower (11) and a upper (12) cladding layer, of a lower refractive index than the waveguide core layer (10), —a sensing section (14A, 14B) comprising a sensing layer (13) included in the upper cladding layer (12), wherein a longitudinal section of said substrate including said waveguide layer structure and said sensing section (14A, 14B) is exchangeable as a separate element (20).

Abstract: The invention relates to an integrated optical waveguide evanescent field sensor (1) for sensing of chemical and/or physical quantities, comprising a substrate (2) carrying a waveguide layer structure provided with—a waveguide core layer (10) sandwiched between two cladding layers (11, 12) formed by a lower (11) and a upper (12) cladding layer, of a lower refractive index than the waveguide core layer (10),—a sensing section (14A, 14B) comprising a sensing layer (13) included in the upper cladding layer (12), wherein a longitudinal section of said substrate including said waveguide layer structure and said sensing section (14A, 14B) is exchangeable as a separate element (20).

Abstract: Integrated optical waveguide interferometer for evanescent sensing of chemical and/or physical quantities, comprising a substrate carrying a waveguide layer structure provided with: a first waveguide core layer sandwiched between two first cladding layers formed by a first lower and a first upper (6) cladding layer, of a lower refractive index than the first waveguide core layer, a second waveguide core layer sandwiched between two second claddings layers formed by a second lower and a second upper (6) cladding layer, of a lower refractive index than the second waveguide core layer, a splitter (2) and a combiner (5) for optically coupling said first and second waveguide core layers at first and second junctions, respectively, characterized by a modulation section of a polymer cladding material (9) included in one of the first upper cladding layers (6) and/or included in one of the second upper cladding layers (6), the polymer cladding material covering an identifiable area of said first waveguide core layer a

Abstract: The invention pertains to a thermo-optical device comprising a waveguiding structure (1) which comprises at least one input light path (2) and at least two output light paths (3,3′) forming a first y-splitter (4), at least one output light path (3,3′) being provided with primary heating elements (5,5′), characterised in that the output light paths (3,3′) are provided with an additional branch (6) forming a second y-splitter (7), wherein at least one of the branches (6,6′) is provided with a secondary heating element (8,8′). The additional branches (6) may be positioned in the opposite direction, such that in each of the second y-splitters (7) one branch (6′) coincides with one of the output light paths (3,3′) of the first y-splitter (4).