Telefonaktiebolaget Lm Ericsson (publ)

Alessandra Bigongiari

Antonio D'Errico

Marco Romagnoli

Francesco Testa

Stefano Stracca

Mats Johansson

Gabriele De Angelis

Antonio Malacarne

Luigi Tallone

Claudio Porzi

Stefano Tirelli

A photonic radio frequency, RF, signal generation apparatus has a source to output a coherent optical signal at a carrier frequency; an optical splitter to split the signal into a first and a second optical carrier signal; an RF signal generation apparatus generating an RF signal at an initial frequency; an optical modulation apparatus modulating the first and second signals at the initial frequency to generate optical harmonic signals around each signal; a first optical filter to select an nth order optical harmonic signal of a first sign, +n, of the optical harmonics around the first signal; a second optical filter to select the nth order optical harmonic signal of an opposite sign, −n, of the optical harmonics around the second signal; and a combiner to combine the selected +n and −n signals to generate an optical beat signal forming an output photonic RF signal.

Photonic RF signal generation apparatus, network units and method

A photonic chip is disclosed that comprises a cladding material and an edge coupler. The edge coupler comprises a composite guiding structure that comprises a plurality of substantially parallel planar layers of optical guiding material. Each layer of the composite guiding structure extends into the cladding material, wherein each layer is aligned at a first edge of the photonic chip. The layers overlap along a first axis which is perpendicular to a plane of the planar layers of optical guiding material. The photonic chip is arranged for deposition of a waveguide on the cladding material, the waveguide being arranged to at least partially overlap along the first axis with a layer of the composite guiding structure. Also disclosed is a method of manufacturing a photonic chip.

Photonic chip with edge coupler and method of manufacture

An optical connector for a photonic circuit. The optical connector includes a first part, fixable to a photonic circuit, having at least one slab of optically transparent material, the at least one slab including a first lens. The optical connector includes a second part, movable between a connected position adjacent the first part and a disconnected position removed from the first part. The second part includes at least one slab of optically transparent material, the at least one slab including a second lens located to be in alignment with the first lens in the connected position. One or more guiding elements are arranged to direct light to the second lens. The second part is configured to connect the one or more guiding elements to an optical fiber.

Optical connector for photonic circuits

Embodiments described herein provide a waveguide for transmitting electromagnetic radiation. The waveguide comprising a core region, a cladding region extending around the core region; and a first layer of a material having a thickness of less than a skin depth of the material for electromagnetic radiation of a first wavelength; wherein the first layer is configured with a periodic refractive index and positioned within the waveguide such that a first surface polariton wave is excited at an interface between the core region and cladding region when electromagnetic radiation of the first wavelength is transmitted through the core region. There is also provided a method of manufacture of the waveguide.

Photonic waveguide

Embodiments described herein relate to methods and apparatus for generating electromagnetic radiation in an electro-optical apparatus. An electro-optical apparatus comprises a core region; a cladding region extending around the core region, and a first layer of a material extending along an interface between the core region and the cladding region, wherein the first layer is configured with a changing refractive index along at least a first direction; and a set of driving electrical contacts configured to apply a voltage in a second direction on the first layer, such that electrons in the first layer are accelerated between the set of driving electrical contacts to generate a surface polariton wave at the interface between the core region and the cladding region, wherein the surface polariton wave propagates in the first direction, and wherein a thickness of the first layer is less than an extinction length of the surface polariton wave in the material, and the first layer is positioned a distance less than or equal to the extinction length of the surface polariton from the interface between the core region and the cladding region.

Growing community of inventors

Pisa, Italy

Alessandra Bigongiari