| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 385045000 | "Y" coupler | 10 |
| 20080267564 | Optical Waveguide Structure Having Asymmetric Y-Shape and Transceiver for Bidirectional Optical Signal Transmission Using the Same - Disclosed are an asymmetric Y-shaped optical waveguide structure and an optical transceiver using the structure. The asymmetric Y-shaped optical waveguide structure includes a main axis optical waveguide extended in a longitudinal direction; and a branch optical waveguide extended from an extension start point in the main axis optical waveguide in a longitudinal direction as much as a predetermined region and then diverged outside. The main axis optical waveguide and the branch optical waveguide have effective refractive indexes, the magnitude relation of which is reversed for optical signals having first and second wavelength range. The optical transceiver includes an asymmetric Y-shaped optical waveguide structure, an optical fiber optically coupled to the structure for transmitting/receiving of the bi-directional optical signal, a laser diode and a photodiode. Accordingly, it is possible to miniaturize the optical transceiver, reduce a packaging cost, and improve reliability of the optical transceiver. | 10-30-2008 |
| 20080267565 | Y-Junction Reflector Tunable Delay or Resonator Waveguide Devices - The invention provides tunable delay or resonator devices in an electro optical substrate. Signals in at least one waveguide in the electro optical substrate pass through Y-junction reflectors which direct signals from one branch of the waveguide back into another branch of the waveguide. A coupled delay or resonator approximated loop is presented in an embodiment of the invention with opposing Y-junction reflectors. In other embodiments of the invention, a delay ladder is provided with selectable levels of delay from multiple outputs. | 10-30-2008 |
| 20080298747 | OPTICAL WAVEGUIDE DEVICE - An optical waveguide device comprises a first under-cladding layer, a light emitting element provided on an upper surface of the first under-cladding layer and having a light emitting portion which emits light, and a core provided on the upper surface of the first under-cladding layer and having a light receiving portion which receives the light emitted from the light emitting portion of the light emitting element. The light receiving portion of the core has a generally U-shape as seen in plan, and the emitted light is projected into an opening of the generally U-shaped light receiving portion. | 12-04-2008 |
| 20090162014 | OPTICAL WAVEGUIDE DEVICE AND OPTICAL APPARATUS USING OPTICAL WAVEGUIDE DEVICE - According to an aspect of an embodiment, an optical waveguide; and a branching section which branches a part of a light propagating through the optical waveguide, wherein the branching section has a first coupler which branches the light propagating through the optical waveguide according to a given unequal branching ratio so as to output first and second branched lights, and uses the first branched light as a first output light; and a second coupler which inputs the second branched light output from the first coupler and branches the second branched light into two lights according to a branching ratio which is substantially equal to the branching ratio in the first coupler so as to output third and fourth branched lights, and uses the fourth branched light as a second output light. | 06-25-2009 |
| 20090285532 | Optical waveguide and method for manufacturing the same - [Object] A self-written branched optical waveguide is formed. | 11-19-2009 |
| 20090304332 | Optical Splitter - An optical splitter ( | 12-10-2009 |
| 20100046890 | Optical Beam Splitter - An optical beam splitter includes an input waveguide, two or more branching arms, two or more fan-out arms, and two or more output waveguides. The input waveguide receives an input light beam. The two or more branching arms are coupled to the input waveguide at a separation point and split the input light beam at the separation point into two or more light beams. Each fan-out arm is coupled to one of the branching arms and fans-out one of the two or more light beams to a predetermined output pitch. Each output waveguide is coupled to one of the fan-out arms and transmits one of the two or more light beams out of the optical beam splitter. | 02-25-2010 |
| 20100172614 | BIDIRECTIONAL OPTICAL MODULE AND OPTICAL TIME DOMAIN REFLECTOMETER - A bidirectional optical module according to the present invention emits light to an optical fiber and allows returning light from the optical fiber to enter and includes a plurality of light emitting elements that emit light to enter the optical fiber, a light receiving element that receives light having exited the optical fiber, and a non-reciprocal unit for making an optical path in a forward direction from the light emitting element to the optical fiber and an optical path in a backward direction from the optical fiber to the light emitting element different. Then, polarization planes of light incident on the optical fiber after being emitted from the plurality of light emitting elements are mutually orthogonal, and the non-reciprocal unit emits returning light of light emitted from the plurality of light emitting elements from the optical fiber toward the light receiving element to one light receiving element. | 07-08-2010 |
| 20130064505 | AREA ARRAY WAVEGUIDE POWER SPLITTER - A method for constructing an area array waveguide power splitter includes preparing a reflective layer on a substrate and forming a core of an area array waveguide layer and alignment features for an optical fiber input and a plurality of optical fiber outputs atop the reflective layer, wherein the core of the area array waveguide layer and the alignment features are formed concurrently. The method also includes applying a reflective layer to the top and side surfaces of the core of the area array waveguide layer and exposing an input and exposing a plurality of outputs in the reflective layer. | 03-14-2013 |
| 20140178005 | Compact and low loss Y-junction for submicron silicon waveguide - A compact, low-loss and wavelength insensitive Y-junction for submicron silicon waveguides. The design was performed using FDTD and particle swarm optimization (PSO). The device was fabricated in a 248 nm CMOS line. Measured average insertion loss is 0.28±0.02 dB across an 8-inch wafer. The device footprint is less than 1.2 μm×2 μm, orders of magnitude smaller than MMI and directional couplers. | 06-26-2014 |
