| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 385042000 | Directional coupler | 19 |
| 20090003769 | OPTICAL ISOLATOR - On a surface of an Si layer of a substrate, a plurality of optical waveguides are formed that extend linearly in the Y-axis direction and that are separated from each other by a predetermined spacing in the X-axis direction. These optical waveguides each have a width that monotonously increases in the X-axis direction such that an amount of change of the equivalent refractive index of optical waveguides per unit length is constant in the X-axis direction. In this way, an optical isolator is obtained that can operate for an input light in any state of polarization and that can remove a returned light in any state of polarization without allowing the light to return to an input portion. | 01-01-2009 |
| 20090034909 | Optical Isolator - An optical isolator is constituted by providing a substrate, a waveguiding layer lattice-matched to the substrate, and a non-reciprocal phase shifter, and a waveguide and a curved waveguide for guiding the waveguiding layer are formed in the waveguiding layer, and a branch coupler is also provided therein, furthermore, a refractive index of the waveguiding layer is made larger than 3.36 by changing a semiconductor composition. | 02-05-2009 |
| 20090052841 | Laser and photodetector coupled by planar waveguides - An optical apparatus comprises: a waveguide substrate; three planar optical waveguides formed on the substrate, each comprising a transmission core and cladding; a laser positioned to launch its optical output to propagate along the first waveguide; a photodetector positioned to receive an optical signal propagating along the second waveguide; and a branched splitter core formed on the substrate for (i) transferring a first fraction of laser optical output propagating along the first waveguide to the second waveguide, and (ii) transferring a second fraction of the laser optical output propagating along the first waveguide to the third waveguide. | 02-26-2009 |
| 20090252455 | OPTICAL PATH CHANGING MEMBER - An optical path changing member is assembled at ends of optical fibers and placed to face a substrate including an optical input/output terminal having optical axes inclined with respect to optical axes of the ends. The optical path changing member is made of a transparent material and includes a member body having a reflection surface for optically connecting the ends to the optical input/output terminal. The member body has optical fiber insertion holes and an end placement portion to which the insertion holes are open and in which the end faces of the optical fibers are placed. The reflection surface is formed so that light entering from the end faces of the optical fibers into the member body will be internally reflected toward the optical input/output terminal in the member body. The end placement portion is filled with an adhesive by which the ends are fixed to the member body. | 10-08-2009 |
| 20090324172 | Optical branching-coupling device, and manufacturing method and optical module of the same - The optical branching-coupling device having a self-written optical waveguide core is formed without using half mirrors. In the optical branching-coupling device, three POFs are inserted into a housing having an approximately D-shaped sidewall. An approximately semi-columnar region V in the housing was filled with an uncured liquid light-curing acrylic resin. A laser beam was introduced from one of the POFs, and a cured material was formed of the end face of the POF. The diameter was equal to the core diameter of the POF. The cured material grew, resulting in the cured material reaching the end face of another one of the POFs, thereby forming an optical waveguide core. Next, a laser beam was introduced from the end face of the last one of the POFs. The cured material grew, resulting in a connection with the optical waveguide core, thereby forming the optical waveguide core. | 12-31-2009 |
| 20100316332 | BIAS-INSTABILITY REDUCTION IN FIBER OPTIC GYROSCOPES - Apparatus for providing Bias-Instability reduction in Fiber Optic Gyroscopes are provided. In one embodiment, an optical circuit for a fiber optic gyroscope having a broadband light source and an optical fiber loop comprises: a PM fiber of length v; an IOC coupled to the PM fiber via a pigtail of length d | 12-16-2010 |
| 20110091157 | THREE-DIMENSIONAL MACRO-CHIP INCLUDING OPTICAL INTERCONNECTS - A multi-chip module (MCM), which includes a three-dimensional (3D) stack of chips that are coupled using optical interconnects, is described. In this MCM, disposed on a first surface of a middle chip in the 3D stack, there are: a first optical coupler, an optical waveguide, which is coupled to the first optical coupler, and a second optical coupler, which is coupled to the optical waveguide. The first optical coupler redirects an optical signal from the optical waveguide to a first direction (which is not in the plane of the first surface), or from the first direction to the optical waveguide. Moreover, the second optical coupler redirects the optical signal from the optical waveguide to a second direction (which is not in the plane of the first surface), or from the second direction to the optical waveguide. Note that an optical path associated with the second direction passes through an opening in a substrate in the middle chip. | 04-21-2011 |
| 20120033915 | OPTICAL FORCE BASED BIOMOLECULAR ANALYSIS IN SLOT WAVEGUIDES - An architecture for the handling and transport of nanoscopic matter in lab on a chip devices using optical forces. A slot waveguide is used to focus and harness optical energy to trap and transport nanoscale objects. The slot waveguide is a unique structure that has several advantageous features, such as high optical confinement, and enables nanoparticles to interact fully with a propagating optical mode. | 02-09-2012 |
| 20120224812 | 90-DEGREE HYBRID - The present invention provides a 90-degree hybrid capable of miniaturization and also capable of a stable operation in a wide band. According to an embodiment of the present invention, a PLC-type 90-degree hybrid comprises: a PLC chip having a planar lightwave circuit formed therein; and a 90-degree hybrid circuit formed in the planar lightwave circuit, mixing a modulated signal light and an LO light to separate the signal light into quadrature components I and Q, and outputting the same. The 90-degree hybrid circuit includes: two Y-branch couplers each branching the signal light and the LO light; and two wavelength-independent directional couplers which cause LO lights passing through two paths and signal lights passing through two paths to interfere with each other, respectively. The above-described paths include waveguides having mutually inverted shapes and waveguides having an identical shape, and have a shape substantially symmetrical with respect to the signal light. | 09-06-2012 |
| 20120321251 | THREE-DIMENSIONAL MACRO-CHIP INCLUDING OPTICAL INTERCONNECTS - A multi-chip module (MCM) includes a stack of chips that are coupled using optical interconnects. On a first surface of a middle chip in the stack, there are: a first optical coupler, an optical waveguide, which is coupled to the first optical coupler, and a second optical coupler, which is coupled to the optical waveguide. The first optical coupler redirects an optical signal from the optical waveguide to a first direction (which is not in the plane of the first surface), or from the first direction to the optical waveguide. The second optical coupler redirects the optical signal from the optical waveguide to a second direction (which is not in the plane of the first surface), or from the second direction to the optical waveguide. An optical path associated with the second direction passes through an opening in a substrate in the middle chip. | 12-20-2012 |
| 20130279855 | BIDIRECTIONAL OPTICAL MODULE - Provided is a bidirectional optical module having an improved structure capable of bidirectionally transmitting an optical signal. The bidirectional optical module includes a first optical transmission member formed lengthwise in one direction and configured to transmit an optical signal, a second optical transmission member formed lengthwise in one direction, configured to transmit an optical signal, and optically coupled to the first optical transmission member, a wavelength filter disposed between the first optical transmission member and the second optical transmission member, and configured to allow penetration of a first optical signal entering from the second optical transmission member and having a first wavelength band and reflection of a second optical signal entering the second optical transmission member and having a second wavelength band, a photoelectric conversion device optically coupled to the first optical transmission member and configured to receive the first optical signal, and an electrophotic conversion device optically coupled to the second optical transmission member and configured to transmit the second optical signal such that the second optical signal passes through the second optical transmission member to be reflected by the wavelength filter. | 10-24-2013 |
| 20130287340 | OPTICAL WAVEGUIDE DIRECTIONAL COUPLER AND METHOD FOR MAKING SAME - An optical waveguide directional coupler includes a base and a Y-shaped optical waveguide formed in the base. The base includes a planar member and a ridge member extending from a side of the planar member. The planar member includes a top surface. The ridge member includes a recessed planar portion and a raised portion raised relative to the recessed planar portion and perpendicularly extending from the planar member. The raised portion has an upper surface coplanar with the top surface. The Y-shaped optical waveguide is exposed to the upper surface and the top surface. One end of the Y-shaped optical waveguide is exposed to an end of the ridge member, and the other two ends are exposed to an end of the planar member. | 10-31-2013 |
| 20130301990 | OPTICAL WAVEGUIDE DIRECTIONAL COUPLER - An optical waveguide directional coupler includes a base and two optical waveguides formed in the base. The base has a ridge portion, and a planar portion adjacent to the ridge portion. Each of the optical waveguides includes a first straight section located in the ridge portion, a second straight section, and a curved section interconnected between the first and second straight sections. The curved sections and the second straight sections are located in the planar portion. The first straight sections are parallel with each other and define a light coupling region therebetween. The second straight sections are parallel with each other, and a distance between the second straight sections being greater than a distance between the first straight sections. | 11-14-2013 |
| 20130322823 | OPTICAL WAVEGUIDE DIRECTIONAL COUPLER AND METHOD FOR MAKING SAME - An optical waveguide directional coupler includes a base having a planar member and a ridge member and an optical waveguide in the base. The ridge member extends from the planar member and has an upper surface where the optical waveguide exposed. The optical waveguide includes a first flat side surface, a second flat side surface parallel to the first flat side surface, a third flat side surface, a fourth flat side surface parallel to the third flat side surface, and a first flat connection side surface. An included angle θ1 between the first and third flat side surfaces is an obtuse angle, an included acute angle α1 is formed between the first flat connection side surface and the second flat side surface, and θ1 and α1 satisfy α1<(180°−θ1). | 12-05-2013 |
| 20130330041 | WIDE-BAND OPTICAL COUPLER - The present invention aims to provide a low-wavelength-dependent optical coupler capable of concurrently achieving high process stability and low polarization dependence. An optical coupler | 12-12-2013 |
| 20140169740 | METHOD AND SYSTEM FOR STABILIZED DIRECTIONAL COUPLERS - Methods and systems for stabilized directional couplers are disclosed and may include a system comprising first and second directional couplers formed by first and second waveguides, where one of the waveguides may comprise a length extender between the directional couplers. The directional couplers may be formed by reduced spacing between the waveguides on opposite sides of the length extender. An input optical signal may be communicated into one of the waveguides, where at least a portion of the input optical signal may be coupled between the waveguides in the first directional coupler and at least a portion of the coupled optical signal may be coupled between the waveguides in the second directional coupler. Optical signals may be communicated out of the system with magnitudes at a desired percentage of the input optical signal. The length extender may add phase delay for signals in one of the first and second waveguides. | 06-19-2014 |
| 20140355935 | DIRECTIONAL COUPLING-TYPE MULTI-DROP BUS - The invention relates to a directional coupling-type multi-drop bus of which the impedance is matched with the bus at the time of coupling so that the speed is increased. A directional coupler is formed when a second module provided with a second coupler end is mounted on a first module provided with a first coupler end, and as a result, the coupling impedance where the proximity effects in the coupling state of the directional coupler are reflected is matched with the impedance of the bus. | 12-04-2014 |
| 20150125116 | APPARATUS AND A METHOD FOR JOINTING A FIRST AND A SECOND OPTICAL FIBRE OF A COMPOSITE CABLE - An apparatus and a method for jointing a first optical fibre and a second optical fibre, the apparatus includes a composite cable, where the composite cable includes an electric power cable, a first optical fibre cable including the first optical fibre, and a second optical fibre cable including the second optical fibre, wherein the apparatus includes a first routing device and a second routing device, each routing device being arranged to change the direction of a fibre optic path from a first axis to a second axis and including a first optical fibre portion aligned with the first axis, a second optical fibre portion aligned with the second axis, and an intermediate optical fibre portion integral with the first and second optical fibre portions and extending through an arc between the first and second optical fibre portions, the intermediate optical fibre portion in the region of the arc having a reduced diameter in relation to the diameter of the first and second optical fibre portions, wherein the first optical fibre is optically connected to the first optical fibre portion of the first routing device, wherein the second optical fibre is optically connected to the first optical fibre portion of the second routing device, and wherein the second optical fibre portion of the first routing device is optically connected to the second optical fibre portion of the second routing device. | 05-07-2015 |
| 20150293304 | DIRECTIONAL COUPLER SYSTEM - A circuit can include a tandem directional coupler comprising a first directional coupler and a second directional coupler connected in tandem. Each of the first and second directional couplers can have a first strip and a second strip. Port | 10-15-2015 |
