Commissariat &#xc0; L'&#xc9;nergie Atomique Et Aux &#xc9;nergies Alternatives

Stmicroelectronics (crolles 2) Sas

Commissariat a L'energie Atomique

Institut National Des Sciences Appliquees De Lyon

Philippe Grosse

Patrick Le Maitre

Jean-Francois Carpentier

Stéphane Bernabe

Christophe Kopp

Sylvie Menezo

Patrick Chaton

Stephane Getin

Jean-François Carpentier

Regis Orobtchouk

Jean-Baptiste Trebbia

An optical testing circuit on a wafer includes an optical input configured to receive an optical test signal and photodetectors configured to generate corresponding electrical signals in response to optical processing of the optical test signal through the optical testing circuit. The electrical signals are simultaneously sensed by a probe circuit and then processed. In one process, test data from the electrical signals is simultaneously generated at each step of a sweep in wavelength of the optical test signal and output in response to a step change. In another process, the electrical signals are sequentially selected and the sweep in wavelength of the optical test signal is performed for each selected electrical signal to generate the test data.

Opto electrical test measurement system for integrated photonic devices and circuits

A photonic circuit testing device, including a photonic test chip including, on the side of a first surface of the chip: micropillars, each intended to be placed in contact with a corresponding electric connection pad of the photonic circuit; and first optical input/output ports, each intended to be optically coupled to a second corresponding optical input/output port of the photonic circuit.

Integrated photonic test circuit

A method of arranging a network of optical fiber ends opposite a corresponding network of waveguide ends of a semiconductor wafer displaceable with respect to each other in orthogonal directions X and Y, the method including: arranging the fibers so that the network ends have the same orientation and that the projection of the axis of each fiber on the wafer is parallel to direction Y; injecting, into one of the fibers, a light beam having a wavelength such that light is scattered from the fiber walls, locating the fiber axis, and displacing the fibers or the wafer in direction X to align a characteristic point in line with the projection of the fiber axis on the wafer.

Method of arranging optical fiber ends opposite waveguide ends

A method of adjusting the parallelism of a surface of a block of optical fibers with a surface of a semiconductor chip or wafer laid on an XY table, including the steps of: a) providing a sensor rigidly attached to the XY table and a handling arm supporting the block, said surface facing the XY table; b) for each of three non-aligned points of the surface of the block, displacing with respect to each other the XY table and the block in the X and/or Y directions to place the sensor opposite the point, and estimating, with the sensor, the distance along the Z direction between the point and the sensor; and c) modifying the orientation of the block by means of the handling arm to provide the desired parallelism.

Method of adjusting the parallelism of a fiber block with a chip surface

Optical coupling of a photonic chip to an external device by use of a system with two lenses. The photonic chip comprises a light guide layer supported by a substrate and covered by an encapsulation layer, and a lens integrated into either the front face or the back face. The light guide layer includes a wave guide coupled to a surface grating coupler. An arrangement of one or several reflecting structures each on either the front face or the back face, is provided. This arrangement comprises a reflecting structure on the back face and is made so as to assure propagation of light between the surface grating coupler, and the lens along an optical path having at least one fold. The invention also covers the fabrication method of such a photonic chip.

Photonic chip with reflecting structure for folded optical path

An optical duplexer intended to receive light at a first optical wavelength and to transmit back light at a second optical wavelength, including, on a substrate, successive layers forming a photoreceptor of the first optical wavelength, a selective filter letting through the first optical wavelength, and a waveguide having a surface including a grating which is transparent for the first optical wavelength and diffracting for the second optical wavelength.

Nanophotonic optical duplexer

A non-destructive method for characterizing a surface-illuminated integrated optical coupler associated with an optical waveguide, comprising the steps of measuring the reflection coefficient on a first region of the coupler at a distance from the optical waveguide and constructing a first curve, determining a first model of the reflection coefficient on the first region, performing a first parameter fitting between the first curve and the first model to determine first parameters, measuring the reflection coefficient on a second region of the coupler close to the guide, and constructing a second curve, determining a second model of the reflection coefficient on the second region, performing a second parameter fitting between the second curve and the second model to determine second parameters, and constructing the characteristic of the coupling efficiency of the coupler using the first and second parameters.

Non-destructive testing of an integrated optical coupler in an integrated optical circuit

A method and a device, using a system of plural cavity resonators, enabling to measure the light absorption or diffusion of biological samples. A measurement of low absorption or diffusion can be achieved and for example be applied for measuring the hybridization of DNA strands.

Method and device for measuring the absorption or light diffusion of biological elements

Resonant cavity diode, operating at the same wavelength for emission and detection of light. This diode is particularly applicable to telecommunications and comprises a resonant cavity () delimited by two mirrors () and containing an active medium () and at least two insulating and coaxial rings () with the same inside diameter and the same outside diameter, the total thickness of the rings being provided such that the optical length of the resonant cavity is k&#xd7;&#x3bb; (k&#x2267;2), in the part of this cavity that passes through the rings, and is (k&#x2212;1)&#xd7;&#x3bb; in the part containing these rings, where &#x3bb; is the wavelength at which the diode is capable of emitting and detecting.

Growing community of inventors

Sassenage, France

Philippe Grosse