Abstract:
Optical component and methods for forming optical components are described. The optical component includes a substrate having a base and a fin extending from the base, a buffer layer formed on the substrate leaving a portion of the fin exposed, and a confinement layer deposited over the buffer layer and the fin. The refractive index of the substrate is greater than the refractive index of the confinement layer, and the refractive index of the confinement layer is greater than the refractive index of the buffer layer.
Abstract:
An integrated optical device fabricated in the back end of line process located within the vertical span of the metal stack and having one or more advantages over a corresponding integrated optical device fabricated in the silicon on insulator layer. According to a first broad aspect disclosed is a method of integrated optical device fabrication including: forming a waveguide portion of an optical device within a vertical span of a metal stack of an integrated semiconductor chip as part of a back end of line fabrication process.
Abstract:
In an example, a coupled system includes a first waveguide, at least one second waveguide, and an interposer. The first waveguide has a first refractive index n1 and a tapered end. The at least one second waveguide each has a second refractive index n2. The interposer includes a third waveguide having a third refractive index n3 and a coupler portion, where n1 > n2 > n3. The tapered end of the first waveguide is adiabatically coupled to a coupler portion of one of the at least one second waveguide. A tapered end of one of the at least one second waveguide is adiabatically coupled to the coupler portion of the third waveguide of the interposer. The coupled system is configured to adiabatically couple light between the first waveguide and the at least one second waveguide and between the at least one second waveguide and the third waveguide.
Abstract:
A polarization splitter and rotator device (500) includes an optical mode converter (501) comprising a first optical waveguide (511), wherein a core (515, 517a, 517b) of the first optical waveguide (511) is asymmetrically shaped provoking polarized light coupled into the first optical waveguide (511) to exchange its transverse magnetic mode of zeroth order (TM0) to a transverse electric mode of first order (TE0) while leaving its transverse electric mode of zeroth order (TE0) unchanged; and an output coupler (503) comprising a second optical waveguide (512) coupled to the first optical waveguide (511) and a third optical waveguide (513) adiabatically coupled to the second optical waveguide (512), the adiabatically coupling provoking the polarized light coupled from the first optical waveguide (511) into the second optical waveguide (512) to spread its power between the second optical waveguide (512) and the third optical waveguide (513) by coupling its transverse electric mode of first order (TE1) as transverse electric mode of zeroth order (TE0) into the third optical waveguide (513) and keeping its transverse electric mode of zeroth order (TE0) propagating in the second optical waveguide (512) without coupling to the third optical waveguide (513).
Abstract:
We have demonstrated a novel Sagnac loop and micro-ring based laser cavity which is simple and reliable, with accurately controlled reflectivity and negligible excess loss. The resonant wavelength of a 2 μm radius micro-ring is shown to be lithographically controlled to a standard deviation of 3.6 nm. Both C- and O-Band lasers based on Sagnac loop mirror and micro-ring cavity have been demonstrated. The lasers are shown to be able to be modulated at 40 Gb/s.
Abstract:
A substrate is composed of a first material. A photonic structure is composed of the first material connected to one or more support structures composed of the first material between the photonic structure and a surface of the substrate, with at least one of the support structures supporting a first section of a strip of the photonic structure. The first section has a width that is wider than a width of a second section of the strip and has a length that is at least about twice the width of the second section of the strip.
Abstract:
Il s'agit d'un guide d'onde optique comportant un premier substrat (10) incorporant un première structure de guidage optique (12) exposée en surface (11) du premier substrat (10), un second substrat(20) incorporant une seconde structure de guidage optique (22) exposée en surface (21) du second substrat (20), ces deux substrats (10, 20) étant assemblés superposés par leurs surfaces (11, 21) de manière à ce que les deux structures de guidage optique (12, 22) soient en regard et s'étendent dans une même direction, un canal (30) étant aménagé entre la première et la seconde structure de guidage (12, 22), dirigé le long de ladite direction, ce canal (30) ayant une section droite dont une grande dimension est sensiblement parallèle à la surface (11) du premier substrat (10) et à la surface (22) du second substrat (20), permettant à de la lumière d'interagir sur une distance donnée avec le fluide. Application notamment à l'analyse de fluides.
Abstract:
An optocoupler, an optical interconnect and method of manufacture providing same are provided for coupling an optical signal between a high refractive index waveguide of an integrated circuit and a waveguide external to the integrated circuit. The optocoupler includes a thinned high refractive index waveguide having a thickness configured to exhibit an effective refractive index substantially matching a refractive index of the external waveguide.