摘要:
Embodiments disclosed herein generally relate to optical couplers for transmitting an optical signal between a waveguide in an optical device to an external light-carrying medium and vice versa. The couplers include first and second portions that extend away from the waveguide towards an optical interface that faces the light-carrying medium. The first portion is attached to the waveguide, while the second portion is not. In one example, a first end of the first portion is attached to the waveguide, while a second end, opposite the first end, faces the optical interface. The first portion may taper as it extends from the first end to the second. The second portion of the coupler may be physically separated from both the first portion and the waveguide. However, in one embodiment, the first and second portions extend in the same direction towards the optical interface.
摘要:
A method for preparing an article includes applying a first composition on a substrate to form a first layer, and applying a curing condition to a target portion without applying the curing condition to a non-target portion of the first layer to form a first contrast layer. A second composition is then applied on the first contrast layer to form a second layer, and a curing condition is applied to a target portion without applying the curing condition to a non-target portion of the second layer and first contrast layer to form a second contrast layer. A third composition can optionally be applied and cured on the second contrast layer to form a third contrast layer having a cured and uncured portion in the same manner. The uncured portions of these contrast layers are then selectively removed to prepare the article.
摘要:
A 2-D sensor array includes a semiconductor substrate and a plurality of pixels disposed on the semiconductor substrate. Each pixel includes a coupling region and a junction region, and a slab waveguide structure disposed on the semiconductor substrate and extending from the coupling region to the region. The slab waveguide includes a confinement layer disposed between a first cladding layer and a second cladding layer. The first cladding and the second cladding each have a refractive index that is lower than a refractive index of the confinement layer. Each pixel also includes a coupling structure disposed in the coupling region and within the slab waveguide. The coupling structure includes two materials having different indices of refraction arranged as a grating defined by a grating period. The junction region comprises a p-n junction in communication with electrical contacts for biasing and collection of carriers resulting from absorption of incident radiation.
摘要:
A pad-array arrangement structure on a substrate for mounting an IC chip on the substrate, wherein a structure with which it is possible to maximally avoid an increase in the number of wiring layers on the substrate is obtained by devising the pad arrangement in an IC pad-array region. A embodiment of the present invention provides a pad-array structure on a substrate for mounting an IC chip on the substrate. The present invention is characterized in that: a plurality of ground pads arrayed equidistantly in a first row, and a plurality of signal pads arrayed equidistantly in a second row on the inside of and parallel to the first row, are provided on a first circumferential edge in the pad-array region; each of the signal pads passes between two adjacent ground pads in the first row and is connected to an external circuit on the substrate; and electrical signals are input to and output from the external circuit.
摘要:
A photoelectric conductive motherboard with electronic modules. The multilayer board conducts electricity to provide power for the individual modules, and concurrently propagates light allowing the modules to communicate with each other by an integrated array of light emitters and receivers that are paired by wavelength and intensity. Large amounts of information can be transmitted between the modules simultaneously, at extremely high speeds, without the need for additional hardware.
摘要:
A portion of an optical waveguide extending laterally within a photonic integrated circuit (PIC) chip is at least partially freed from the substrate to allow physical displacement of a released waveguide end relative to the substrate and relative to an adjacent photonic device also fabricated in the substrate. The released waveguide end may be displaced to modulate interaction between the photonic device and an optical mode propagated by the waveguide. In embodiments where the photonic device is an optical coupler, employing for example an Echelle grating or arrayed waveguide grating (AWG), mode propagation through the coupler may be modulated via physical displacement of the released waveguide end. In one such embodiment, thermal sensitivity of an integrated optical wavelength division multiplexer (WDM) is reduced by displacing the released waveguide end relative to the coupler in a manner that counters a temperature dependence of the optical coupler.
摘要:
L'invention porte sur un substrat (S) localement pré-structuré pour la réalisation de composants photoniques (Cp1-Cp4), comportant : - une partie massive en silicium (10) ; - une première région localisée du substrat, comprenant : o une couche (11), dite de dissipation thermique, réalisée de manière localisée en surface de la partie massive (10) et formée en un matériau dont l'indice de réfraction est inférieur à celui du silicium ; o un guide d'ondes (12) sur la couche de dissipation thermique (11) ;
- une deuxième région localisée du substrat, comprenant : o une couche d'oxyde (13) réalisée de manière localisée en surface de la partie massive (10), l'oxyde présentant une conductivité thermique inférieure à celle du matériau de la couche de dissipation thermique (11) ; o un guide d'ondes (14) sur la couche d'oxyde.
L'invention porte également sur un procédé de fabrication d'un tel substrat pré-structuré, ainsi que sur un circuit photonique (Cp) réalisé sur un tel substrat.