Patent application number | Description | Published |
20090148115 | WAVEGUIDE STRUCTURE - A waveguide structure is provided. The waveguide structure includes: a slot channel waveguide including first and second patterns, which are spaced apart from each other to define a slot; a first upper layer covering at least a portion of the slot channel waveguide; and a second upper layer covering the remaining portion of the slot channel waveguide. A thermo-optic coefficient (TOC) of the channel waveguide times a TOC of the second upper layer is a negative number. | 06-11-2009 |
20090154880 | PHOTONICS DEVICE - Provided is a photonics device. The photonics device includes: a substrate including a star coupler region and a transition region; a lower core layer formed on the substrate; and upper core patterns formed on the substrate to define a waveguide. The upper core patterns are disposed on the lower core layer at the transition region, so that the transition region has a multi-layered core structure. | 06-18-2009 |
20090252457 | WAVEGUIDE STRUCTURE AND ARRAYED WAVEGUIDE GRATING STRUCTURE - Provided are a waveguide structure and an arrayed waveguide grating structure. The arrayed waveguide grating structure includes an input star coupler, an output star coupler, and a plurality of arrayed waveguides optically connecting the input star coupler and the output star coupler. Each of the arrayed waveguides includes at least one section having a high confinement factor and at least two sections having a relatively low confinement factor. The sections of the arrayed waveguides having a high confinement factor have the same structure. | 10-08-2009 |
20100150499 | PHOTONICS DEVICE HAVING ARRAYED WAVEGUIDE GRATING STRUCTURES - Provided is a photonics device including at least two arrayed waveguide grating structures. Each of the arrayed waveguide grating structures of the photonics device includes an input star coupler, an output star coupler, and a plurality of arrayed waveguides optically connecting the input star coupler to the output star coupler. Each of the arrayed waveguides includes at least one first section having a high confinement factor and at least two second sections having a low confinement factor. The first sections of the arrayed waveguides have the same structure. | 06-17-2010 |
20100150500 | OPTICAL DEVICE - Provided is an optical device, which includes a substrate, a first cladding disposed on the substrate, a first optical waveguide extended in a first direction on the first cladding, and having a first refractive index, a side grating formed in at least one side of the first optical waveguide, a second optical waveguide filling a space of the side grating, extended in a second direction across the first direction on the first cladding, and having a second refractive index, and a second cladding disposed on the second optical waveguide, and having a third refractive index, wherein the first refractive index is greater than the second refractive index, and the second refractive index is greater than the third refractive index. | 06-17-2010 |
20100303435 | OPTICAL DEVICE AND METHOD OF FABRICATING THE SAME - Provided are an optical device and a method of fabricating the same. The optical device includes: a substrate; and a ring resonator on the substrate. The ring resonator includes: a cladding layer including a lower cladding layer and an upper cladding layer on the substrate; a core including a plurality of rings between the lower cladding layer and the upper cladding layer; and an embeded layer interposed between the core and the cladding layer and having a refractive index less than that of the core and more than that of the cladding layer. | 12-02-2010 |
20110038588 | OPTICAL COUPLER - Provided is an optical coupler. The optical coupler includes a lower cladding layer on a substrate, a core layer on the lower cladding layer, the core layer comprising a diffraction grating coupler and an optical waveguide, and an upper cladding layer on the core layer. The upper cladding layer has a thickness of about one quarter of a wavelength of an optical signal passing through the core layer divided by a refractive index of the first upper cladding layer. Thus, Fresnel reflection may be minimized, and also, it may prevent a Fabry-Perot interferometer from occurring. | 02-17-2011 |
20110058764 | ELECTRO-OPTIC MODULATING DEVICE - Provided is an electro-optic modulating device. The electro-optic modulating device includes an optical waveguide with a vertical structure and sidewalls of the vertical structure are used to configure a junction. | 03-10-2011 |
20110135252 | SILICON PHOTONICS CHIP - Provided is a silicon photonics chip that is thermally separated from a light emitting device. The silicon photonics chip includes photoelectric devices integrated on a silicon substrate. The photoelectric devices include an optical connection device optically guiding at least one signal light incident from a signal light generation device to transmit the signal light into the silicon substrate. The signal light generation device is thermally separated from the photoelectric devices, and is optically connected to the photoelectric devices. | 06-09-2011 |
20110194808 | OPTICAL CONNECTOR AND OPTICAL LINK APPARATUS INCLUDING THE SAME - Provided is an optical connector that can improve coupling efficiency and coupling reliability. The optical connector includes an optical fiber guiding pad configured to guide an optical fiber connected to an optical waveguide that is disposed on an optoelectronic device IC, or includes a ferrule guiding pad and a ferrule guiding bar that guide a ferrule coupled to the optoelectronic device IC. | 08-11-2011 |
20110243507 | OPTICAL CONNECTOR AND OPTICAL APPARATUS HAVING THE SAME - Provided are an optical connector and an optical apparatus having the same. The optical connector comprises a substrate, at least one optical waveguide, an optical coupler, and a ferrule alignment unit. The at least one optical waveguide is formed on the substrate. The optical coupler is formed on the optical waveguide. The ferrule alignment unit allows a ferrule fixing optical fibers combined with the optical coupler to be aligned with the substrate. | 10-06-2011 |
20120114293 | OPTICAL WAVEGUIDE STRUCTURE HAVING ANGLED MIRROR AND LENS - The present disclosure relates to a planar optical waveguide element, and more particularly, to an optical waveguide end structure for effective optical signal connection with a light source, a light receiving element, or a different type of optical waveguide element. | 05-10-2012 |
20120132792 | OPTICAL MODULE COMPRISING OPTICAL HYBRID USING METAL OPTICAL WAVEGUIDE AND PHOTO DETECTOR - An exemplary embodiment of the present disclosure provides an optical module including: an optical hybrid including a metal optical waveguide; a photo detector configured to receive light; and a platform including an optical hybrid supporting section for supporting the optical hybrid, a photo detector supporting section for supporting the photo detector, and an inclined surface configured to change a propagation direction of light emitted from the optical hybrid, and configured to combine the optical hybrid and the photo detector. | 05-31-2012 |
20120155887 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING COHERENT OPTICAL OFDM - Disclosed are a method and an apparatus for transmitting and receiving coherent optical OFDM. The apparatus includes: a transmitted OFDM digital signal processing unit outputting an in-phase (I) component digital signal and a quadrature phase (Q) component digital signal; a digital-analog converter converting the in-phase (I)-component digital signal and the quadrature-phase (Q)-component digital signal into an in-phase (I)-component analog signal and a quadrature-phase (Q)-component analog signal, respectively; an adder adding an additional pilot tone signal to each of the in-phase (I)-component analog signal and the quadrature-phase (Q)-component analog signal outputted from the digital-analog converter; and an optical I/Q modulator up-converting the in-phase (I)-component analog signal added with the additional pilot tone signal and the quadrature-phase (Q)-component analog signal added with the additional pilot tone signal to an optical domain to output a coherent optical OFDM signal including the additional pilot tone signal. | 06-21-2012 |
20130156362 | CORE AND OPTICAL WAVEGUIDE - Provided is a core which reduces optic splice loss between discontinuous optical waveguides. The core includes a first waveguide propagation portion having first light-receiving width, a first lightwave discontinuous portion having second light-receiving width, a first taper structure portion having both ends connected to the first lightwave propagation portion and to the first lightwave discontinuous portion, respectively and decreasing in light-receiving width as it goes from the first lightwave propagation portion to the first lightwave discontinuous portion, a second lightwave propagation portion having third light-receiving width, a second lightwave discontinuous portion having fourth light-receiving width, and a second taper structure portion having both ends connected to the second lightwave propagation portion and to the second lightwave discontinuous portion, respectively and decreasing in light-receiving width as it goes from the second lightwave propagation portion to the second lightwave discontinuous portion. | 06-20-2013 |
20130156394 | OPTICAL COMMUNICATION MODULE AND METHOD OF MANUFACTURING THE SAME - The inventive concept relates to an optical communication module. The optical communication module may include a metal block: an electrical device formed on the metal block; an optical device adhesive block formed on the metal block; an optical device formed on the optical device adhesive block and connected to the electrical device through a bonding interconnection; and a flat type optical waveguide formed on one side of the optical device adhesive block and optically aligned with the optical device. | 06-20-2013 |
20130156424 | APPARATUS FOR MEASURING PERFORMANCE OF COHERENT OPTICAL RECEIVER - An apparatus for measuring performance of a coherent optical receiver includes a beam splitter splitting light into first and second paths, a first optical modulator modulating the first path light, a variable optical attenuator controlling an optical power of the first optical modulator, a first polarization controller transmitting a signal controlling polarization of an output of the variable optical attenuator to the coherent optical receiver, a second optical modulator modulating the second path light, a variable optical delay line delaying time of an output of the second optical modulator, a second polarization controller transmitting a signal controlling polarization of an output of the variable optical delay line to the coherent optical receiver, a network analyzer measuring performance of the coherent optical receiver and controlling the optical modulators, and a controller transmitting a control signal to the optical modulators. | 06-20-2013 |
20140169786 | APPARATUS AND METHOD FOR MEASURING IQ IMBALANCE FOR OPTICAL RECEIVER - Provided is an apparatus and method for measuring IQ imbalance, and in particular, is an apparatus and method for measuring IQ imbalance for an optical receiver. The apparatus for measuring IQ imbalance for an optical receiver includes a light generating unit generating optical and reference signals to provide the optical and reference signals to an optical receiver, a graph creating unit creating a Lissajous figure by using an in-phase (I) signal and a quadrature-phase (Q) signal output from the optical receiver in response to the optical and reference signals, and a calculating unit calculating IQ imbalance for the optical receiver with reference to the Lissajous figure. | 06-19-2014 |
20140205280 | MEASURING DEVICE AND METHOD OF MEASURING SIGNAL TRANSMISSION TIME DIFFERENCE THEREOF - Provided is a method of measuring signal transmission time difference of a measuring device. The measuring device according to embodiments, by measuring a skew on two optical paths through signal delays of sufficient sizes for skew measurement on the optical paths, even a skew having a minute size can be measured within a measureable range. | 07-24-2014 |