Abstract: The present disclosure provides a wavelength division multiplexing (WDM) device for demultiplexing an optical signal including a plurality of wavelength channels. The device comprises at least one demultiplexer block configured to provide, for each wavelength channel of the optical signal, two half-channel signals. The device further comprises a mode mapping block configured to map one half-channel signal related to a split wavelength channel into a first polarization mode, and the other half-channel signal related to the same split wavelength channel into a second polarization mode. The device also comprises an output block for each wavelength channel, each output block being configured to combine polarized half-channel signals related to the same wavelength channel.

Abstract: The present disclosure provides a WDM, device 100 for demultiplexing an optical signal 101 including a plurality of N wavelength channels. The device 100 comprises at least one demultiplexer block 102 configured to split the optical signal into two half-channel signals 103 for each wavelength channel. The device 100 further comprises a mode mapping block 104 configured to map one half-channel signal 103 related to a split wavelength channel into a first polarization mode, and the other half-channel signal 103 related to the same split wavelength channel into a second polarization mode. The device 100 also comprises an output block 105 for each wavelength channel, which is configured to combine all polarized half-channel signals related to the same wavelength channel.

Abstract: An optical chip comprises an input edge coupler having at least one input waveguide and configured to receive light on two orthogonal modes of same polarization, a demultiplexer configured to divide the two orthogonal modes into a mode carried on a first intermediate waveguide and a mode carried on a second intermediate waveguide independent from the first intermediate waveguide, a polarization multiplexer configured to recombine the modes carried on the intermediate waveguides into two polarization-orthogonal modes carried on one output waveguide.

Abstract: An optical chip comprises an input edge coupler having at least one input waveguide and configured to receive light on two orthogonal modes of same polarization, a demultiplexer configured to divide the two orthogonal modes into a mode carried on a first intermediate waveguide and a mode carried on a second intermediate waveguide independent from the first intermediate waveguide, a polarization multiplexer configured to recombine the modes carried on the intermediate waveguides into two polarization-orthogonal modes carried on one output waveguide.

Abstract: A waveguide structure for optical coupling, including a first waveguide embedded in a first cladding, and at least two second waveguides distanced vertically from the first waveguide and embedded in a second cladding provided on the first cladding. The first waveguide and the at least two second waveguides each have an at least partly tapered end section in a coupling region of the waveguide structure, the end section of the first waveguide being tapered oppositely to end sections of the at least two second waveguides. The first waveguide is arranged laterally between the at least two second waveguides in the coupling region.

Abstract: A method for producing an integrated optical circuit comprising an active device and a passive waveguide circuit includes: applying an active waveguide structure on a source wafer substrate; exposing a portion of the source wafer substrate by selectively removing the active waveguide structure; applying a passive waveguide structure on the exposed portion of the source wafer substrate, wherein an aggregation of the active waveguide structure and the passive waveguide structure forms the active device, the active device having a bottom surface facing the source wafer substrate; removing the source wafer substrate from the active device; and attaching the active device to a target substrate comprising the passive waveguide circuit such that the bottom surface of the active device faces the target substrate.

Abstract: The invention relates to a temperature insensitive semiconductor laser, comprising: a gain region for generating laser radiation; a reflector region for reflecting the laser radiation generated in the gain region, and a waveguide for guiding the laser radiation generated in the gain region to the reflector region and for guiding the laser radiation reflected in the reflector region to the gain region, wherein the gain region, the reflector region and the waveguide define a resonating cavity of the semiconductor laser and wherein the waveguide is substantially athermal.

Abstract: A method for producing an integrated optical circuit comprising an active device and a passive waveguide circuit includes: applying an active waveguide structure on a source wafer substrate; exposing a portion of the source wafer substrate by selectively removing the active waveguide structure; applying a passive waveguide structure on the exposed portion of the source wafer substrate, wherein an aggregation of the active waveguide structure and the passive waveguide structure forms the active device, the active device having a bottom surface facing the source wafer substrate; removing the source wafer substrate from the active device; and attaching the active device to a target substrate comprising the passive waveguide circuit such that the bottom surface of the active device faces the target substrate.