Patent application number | Description | Published |
20130209020 | THREE PORT TRANSCEIVER - An optical coherent transceiver comprising a polarization and phase-diversity coherent receiver and a polarization and phase-diversity modulator on the same substrate interfaced by three grating couplers, on grating coupler coupling in a signal, one grating coupler coupling in a laser signal, and a third grating coupler coupling out a modulated signal. | 08-15-2013 |
20130209022 | INTEGRATED BROADBAND OPTICAL ISOLATOR - An integrated broadband optical isolator that operates over a wide bandwidth, wherein the optical isolator comprises sinusoidally driven phase modulators inside an interferometer. In one exemplary embodiment the optical isolator comprises: a 1×N input optical coupler, where N>2; a N×1 output optical coupler; N optical waveguides optically connecting the 1×N input optical coupler to the N×1 output optical coupler, each one of the N optical waveguides including two phase modulators, wherein each of the phase modulators are driven at a frequency f and wherein the time it takes an optical signal to travel from the center of one phase modulator in a particular waveguide to the center of the other phase modulator in that particular waveguide is substantially equal to ¼f. | 08-15-2013 |
20130233824 | LOW-LOSS, WIDE-BAND GRATING COUPLER AND METHOD OF MAKING SAME - A method for fabricating a grating coupler having a bottom mirror in a semiconductor wafer including etching a trench from a top surface of a wafer and around a grating coupler formed in the wafer; etching a void underneath the grating coupler; etching a via into the void from the backside of the wafer; and depositing a mirror on the bottom of the grating coupler. Alternatively, additional oxide may be deposited on the bottom of the grating coupler prior to the deposition of the mirror such that a desirable oxide thickness on the bottom is achieved. | 09-12-2013 |
20130308898 | CO-PACKAGING PHOTONIC INTEGRATED CIRCUITS AND APPLICATION SPECIFIC INTEGRATED CIRCUITS - Disclosed herein are designs, structures and techniques for advanced packaging of multi-function photonic integrated circuits that allow such high-performance multi-function photonic integrated circuits to be co-packaged with a high-performance multi-function ASIC thereby significantly reducing strenuous interconnect challenges and lowering costs, power and size of the overall devices. | 11-21-2013 |
20130343693 | ALTERNATING TRAVELING-WAVE MACH-ZEHNDER MODULATOR - Disclosed herein is a traveling-wave Mach-Zehnder modulator and method of operating same that advantageously exhibits a reduced optical insertion loss as compared with contemporary Mach-Zehnder structures. Such advantage comes at the modest expense of increased modulator length and increased RF loss. | 12-26-2013 |
20130343704 | COMPACT MODE-SIZE TRANSITION USING A FOCUSING REFLECTOR - Disclosed herein are techniques, methods, structures and apparatus for optically coupling optical waveguides and optical structures exhibiting different widths in which In which a focusing reflector is used to optically couple a relatively wide optical waveguide to a relatively narrow optical waveguide. An exemplary method according to the present disclosure comprises the steps of: providing the first waveguide that is 5 or more wavelengths in width; providing the second waveguide that is 3 or less wavelengths in width; coupling light emanating from the first waveguide to the second waveguide through the effect of a slab waveguide having a curved edge. | 12-26-2013 |
20130343705 | CLADDING DEFINED TRANSMISSION GRATING - Disclosed herein are techniques, methods, structures and apparatus for providing photonic structures and integrated circuits with optical gratings disposed within cladding layer(s) of those structures and circuits. | 12-26-2013 |
20140036937 | OTDM COHERENT TRANSCEIVER - An OTDM coherent transceiver and related methods and apparatus that employ a pulsed source which advantageously allows higher symbol rates without requiring higher speed electronics. | 02-06-2014 |
20140064659 | ELECTRONIC AND OPTICAL CO-PACKAGING OF COHERENT TRANSCEIVER - Disclosed herein are co-packaging structures, devices, and methods for integrating a photonic integrated circuit (PIC), an electronic integrated circuit including drivers and transimpedance amplifiers (TIAs) and an ASIC having analog-to-digital converters and a digital signal processor positioned on a common (the same) carrier thereby resulting in a compact coherent transceiver while lowering its cost. | 03-06-2014 |
20140112611 | ROBUST MODULATOR CIRCUITS USING LATERAL DOPING JUNCTIONS - Disclosed herein are methods, structures, and devices that compensates for modulator loss and modulation inefficiencies introduced by mask misalignments in opposite oriented pn type junction modulators. More specifically, Mach-Zehnder type optical modulators are disclosed wherein both arms in the MZI modulator are arranged in a push-pull configuration and configured to experience pn type junctions of two orientations wherein both arms further configured to experience the same length of waveguide with a pn type junction of each orientation. | 04-24-2014 |
20140126902 | OPTICAL COMPENSATION USING A SPACE DIVISION MULTIPLEXING ELECTRO-OPTIC RECEIVER - Disclosed herein are methods, structures, and devices for optical communications systems operating through turbulent media. More specifically, a spatial division multiplexing photonic integrated circuit is used in conjunction with digital signal processing systems to mitigate the effects of the turbulent media. | 05-08-2014 |
20140147079 | COUPLING OF FIBER OPTICS TO PLANAR GRATING COUPLERS - Techniques, methods, structures and apparatus that provide the efficient coupling of light to/from one or more optical fibers to/from planar grating waveguide couplers positioned on photonic integrated circuits. | 05-29-2014 |
20140153601 | TUNABLE LASER USING III-V GAIN MATERIALS - Disclosed herein are techniques, methods, structures and apparatus that provide a laser monolithically integrated in a silicon photonic integrated circuit (PIC) that is suitable for high-performance coherent fiber-optic telecommunications and other applications. Among the features of a laser according to the present disclosure, and in particular a hybrid InGaAsP/Si laser, is an integrated Si isolator to protect the laser from back reflections; optical, rather than electrical pumping; and coupling the optical pump using an InGaAsP grating coupler that acts simultaneously as a WDM coupler and laser mirror. | 06-05-2014 |
20140153931 | SILICON PHOTONICS MULTICARRIER OPTICAL TRANSCEIVER - Disclosed herein are techniques, methods, structures and apparatus that provide a silicon photonics multicarrier optical transceiver wherein both the transmitter and receiver are integrated on a single silicon chip and which generates a plurality of carriers through the effect of an on-chip modulator, amplifies the optical power of the carriers through the effect of an off-chip amplifier, and generates M orthogonal sets of carriers through the effect of an on-chip basis former. | 06-05-2014 |
20140365188 | SPARSE FINITE-DIFFERENCE TIME DOMAIN SIMULATION - Disclosed are accurate and fast methods for simulating electromagnetic wave propagation which employ an omnidirectional vectorial simulation and which measure all frequencies at once. | 12-11-2014 |
20140376000 | INTEGRATED OPTICAL COHERENCE TOMOGRAPHY SYSTEMS AND METHODS - Disclosed herein are optical integration technologies, designs, systems and methods directed toward Optical Coherence Tomography (OCT) and other interferometric optical sensor, ranging, and imaging systems wherein such systems, methods and structures employ tunable optical sources, coherent detection and other structures on a single or multichip monolithic integration. In contrast to contemporary, prior-art OCT systems and structures that employ simple, miniature optical bench technology using small optical components positioned on a substrate, systems and methods according to the present disclosure employ one or more photonic integrated circuits (PICs), use swept-source techniques, and employ a widely tunable optical source(s). | 12-25-2014 |
20150062689 | DISTRIBUTED CMOS DRIVER WITH ENHANCED DRIVE VOLTAGE FOR SILICON OPTICAL PUSH-PULL MACH-ZEHNDER MODULATORS - Disclosed are structures and methods for CMOS drivers that drive silicon optical push-pull Mach-Zehnder modulators (MZMs) with twice the drive voltage per interferometer arm as with prior art designs. | 03-05-2015 |
20150063747 | FIBER ASSEMBLY FOR FACET OPTICAL COUPLING - Disclosed are structures and methods for facet optical coupling of optical fibers to photonic integrated circuits. | 03-05-2015 |
20150063769 | SLAB-MODE AND POLARIZATION CLEAN-UP IN SILICON PHOTONICS - Disclosed are structures and methods directed to waveguide structures exhibiting improved device performance including improved attenuation of scattered light and/or transverse magnetic modes. In an illustrative embodiment according to the present disclosure, a rib waveguide structure including a rib overlying a slab waveguide (or superimposed thereon) is constructed wherein the slab waveguide is heavily doped at a distance from the rib which has a very low overlap with rib guided modes. Advantageously, such doping may be of the P-type or of the N-type, and dopants could be any of a number of known ones including—but not limited to—boron, phosphorous, etc.—or others that increase optical propagation loss. As may be appreciated, the doped regions advantageously absorb scattered light which substantially improves the structure's performance. | 03-05-2015 |