Abstract: An embodiment optical device includes a glass plate, a first trench disposed in the glass plate, and a second trench disposed in the glass plate. The second trench crosses the first trench, and the first trench has an open end in a first wall of the second trench. The optical device includes a waveguide disposed inside the first trench, where the waveguide is formed of a material having a refractive index different from that of the glass plate, and a mirror on a second wall of the second trench opposite the first wall and waveguide. The optical device includes an encapsulation layer filling the second trench and covering all of an upper surface of the waveguide and having a refractive index that is different from the waveguide and the glass plate.

Abstract: An integrated optoelectronic or optical device is formed by a polarization-splitting grating coupler including two optical waveguides, a common optical coupler and flared optical transitions between the optical coupler and the optical waveguides. The optical coupler is configured for supporting input/output of optical waves. A first region of the optical coupler lies at a distance from the flared optical transitions. The first region includes a first recessed pattern. Second regions of the optical coupler lie between the first region and the flared optical transitions, respectively, in an adjoining relationship. The second regions include a second recessed pattern different from the first recessed pattern.

Abstract: A method of manufacturing an optical device is disclosed. The method includes scanning along a curved path at a first surface of a glass plate with a laser beam directed orthogonally to the first surface to form a trench according to a pattern of a waveguide. The curved path is coincident with a longitudinal axis of the waveguide. The method further includes filling the trench with a material having an index different from that of glass to form the waveguide and, after filling the trench, depositing a cladding layer.

Abstract: An embodiment optical device includes a glass plate, a first trench disposed in the glass plate, and a second trench disposed in the glass plate. The second trench crosses the first trench, and the first trench has an open end in a first wall of the second trench. The optical device includes a waveguide disposed inside the first trench, where the waveguide is formed of a material having a refractive index different from that of the glass plate, and a mirror on a second wall of the second trench opposite the first wall and waveguide. The optical device includes an encapsulation layer filling the second trench and covering all of an upper surface of the waveguide and having a refractive index that is different from the waveguide and the glass plate.

Abstract: An integrated optoelectronic or optical device is formed by a polarization-splitting grating coupler including two optical waveguides, a common optical coupler and flared optical transitions between the optical coupler and the optical waveguides. The optical coupler is configured for supporting input/output of optical waves. A first region of the optical coupler lies at a distance from the flared optical transitions. The first region includes a first recessed pattern. Second regions of the optical coupler lie between the first region and the flared optical transitions, respectively, in an adjoining relationship. The second regions include a second recessed pattern different from the first recessed pattern.

Abstract: The present invention relates to a method for manufacturing an optical device comprising forming a first trench in a glass plate and a second trench perpendicular to the first trench, wherein the first trench has an end opening into the second trench. The trenches are treated with hydrofluoric acid. The first trench is filled with a material to form a waveguide, and a mirror is formed on the wall of the second trench opposite the waveguide. An encapsulation layer is deposited over the glass plate, waveguide and second trench.

Abstract: A method of manufacturing an optical device is disclosed. The method includes scanning along a curved path at a first surface of a glass plate with a laser beam directed orthogonally to the first surface to form a trench according to a pattern of a waveguide. The curved path is coincident with a longitudinal axis of the waveguide. The method further includes filling the trench with a material having an index different from that of glass to form the waveguide and, after filling the trench, depositing a cladding layer.

Abstract: A method of manufacturing an optical device is disclosed. The method includes forming a waveguide in a glass plate. The method further includes scanning the glass plate with a laser beam directed at an acute angle with respect to a first surface to form a mirror trench in the glass plate. Scanning the glass plate with the first laser beam includes pulses of the laser beam that have a duration between 2 and 500 femtoseconds. The method also includes filling the mirror trench with a reflective material and depositing a cladding layer over the waveguide and mirror trench.

Abstract: A transformer of the balanced-unbalanced type includes a primary inductive circuit and a secondary inductive circuit housed inside an additional inductive winding connected in parallel to the terminals of the secondary circuit and inductively coupled with the primary circuit and the secondary circuit.

Abstract: A method of manufacturing an optical device is disclosed. The method includes forming a waveguide in a glass plate. The method further includes scanning the glass plate with a laser beam directed at an acute angle with respect to a first surface to form a mirror trench in the glass plate. Scanning the glass plate with the first laser beam includes pulses of the laser beam that have a duration between 2 and 500 femtoseconds. The method also includes filling the mirror trench with a reflective material and depositing a cladding layer over the waveguide and mirror trench.

Abstract: A method of manufacturing a waveguide in a glass plate is disclosed. The glass plate is scanned with a laser beam directed orthogonally to the glass plate to form a trench according to a pattern of the waveguide to be formed. The scanning is performed by pulses of the laser beam having a duration between 2 and 500 femtoseconds. The glass plate with the trench is treated with hydrofluoric acid. After treating the glass plate, the trench is filled with a material having an index different from that of glass, and, after filling the trench, a cladding layer is deposited.

Abstract: The present invention relates to a method for manufacturing an optical device comprising forming a first trench in a glass plate and a second trench perpendicular to the first trench, wherein the first trench has an end opening into the second trench. The trenches are treated with hydrofluoric acid. The first trench is filled with a material to form a waveguide, and a mirror is formed on the wall of the second trench opposite the waveguide. An encapsulation layer is deposited over the glass plate, waveguide and second trench.

Abstract: A method of manufacturing a waveguide in a glass plate is disclosed. The glass plate is scanned with a laser beam directed orthogonally to the glass plate to form a trench according to a pattern of the waveguide to be formed. The scanning is performed by pulses of the laser beam having a duration between 2 and 500 femtoseconds. The glass plate with the trench is treated with hydrofluoric acid. After treating the glass plate, the trench is filled with a material having an index different from that of glass, and, after filling the trench, a cladding layer is deposited.

Abstract: A transformer of the balanced-unbalanced type includes a primary inductive circuit and a secondary inductive circuit housed inside an additional inductive winding connected in parallel to the terminals of the secondary circuit and inductively coupled with the primary circuit and the secondary circuit.

Abstract: A transformer of the balanced-unbalanced type includes a primary inductive circuit and a secondary inductive circuit housed inside an additional inductive winding connected in parallel to the terminals of the secondary circuit and inductively coupled with the primary circuit and the secondary circuit.

Abstract: A transformer of the balanced-unbalanced type includes a primary inductive circuit and a secondary inductive circuit housed inside an additional inductive winding connected in parallel to the terminals of the secondary circuit and inductively coupled with the primary circuit and the secondary circuit.

Abstract: An antenna circuit includes a first antenna tuned to a first fundamental frequency and a second antenna tuned to a second fundamental frequency different from the first fundamental frequency. A first filter has a first terminal connected to the first antenna and attenuates the frequency components outside of a band defined by the first fundamental frequency or its harmonics. A second filter has a first terminal coupled to the second antenna and attenuates the frequency components outside of a band defined by the second fundamental frequency or its harmonics. A passive recombination element couples the second terminals of the two filters to a common terminal.

Abstract: A transformer of the balanced-unbalanced type includes a primary inductive circuit and a secondary inductive circuit housed inside an additional inductive winding connected in parallel to the terminals of the secondary circuit and inductively coupled with the primary circuit and the secondary circuit.

Abstract: A passive filter may include at least one elliptical filter unit and at least one asymmetric rejection filter unit coupled in series with the elliptical filter unit. The at least one asymmetric rejection filter unit may have a frequency response curve that includes a dip with different attenuations on either side, and an overshoot upon exiting the dip at the side with the lower attenuation.

Abstract: An antenna circuit includes a first antenna tuned to a first fundamental frequency and a second antenna tuned to a second fundamental frequency different from the first fundamental frequency. A first filter has a first terminal connected to the first antenna and attenuates the frequency components outside of a band defined by the first fundamental frequency or its harmonics. A second filter has a first terminal coupled to the second antenna and attenuates the frequency components outside of a band defined by the second fundamental frequency or its harmonics. A passive recombination element couples the second terminals of the two filters to a common terminal.