| PHOTONIC SYSTEMS, INC. Patent applications |
| Patent application number | Title | Published |
|---|
| 20120001543 | Room Temperature Silicon-Compatible LED/Laser with Electrically Pumped Field Emission Device - A light source includes a hot electron source comprising a cathode that generates an electron beam and an anode comprising a germanium containing material positioned adjacent to the cathode. The anode is biased so that the electron beam accelerates towards the anode where some electrons are absorbed and then relax to both direct energy bands and indirect energy bands causing stimulation of low energy electrons from the indirect energy band to the direct energy band, thereby creating electroluminescence. | 01-05-2012 |
| 20110287720 | Wide-Bandwidth Signal Canceller - A signal canceller includes a dual-drive electro-optic modulator having separate first and second electrical inputs. The first electrical input is coupled to a first portion of a first signal and the second electrical input is coupled to a second signal and to a second portion of the first signal. A laser generates an optical beam that propagates from the optical input to an optical output of the electro-optic modulator. The dual-drive electro-optic modulator modulates the optical beam with the first and second portions of the first signal and with the second signal. The modulation cancels at least some the first signal and generates a modulation signal with reduced first signal modulation component. | 11-24-2011 |
| 20090274466 | Bi-Directional Signal Interface - A bi-directional signal interface includes a first waveguide that propagates a first traveling wave. The first waveguide has one end that is coupled to a RF input port that receives a RF transmission signal and another end that is coupled to a RF bi-directional port that receives a RF reception signal and that transmits the RF transmission signal. A second waveguide is positioned proximate to the first waveguide. The second waveguide has one end that is coupled to an output port that passes the received RF reception signal. A non-reciprocal coupler couples fields from the first waveguide to the second waveguide so that the RF reception signal from the bi-directional port couples from the first waveguide to the second waveguide in a substantially non-reciprocal manner and then passes through the output port, and the RF transmission signal from the RF input port passes through the first waveguide to the RF bi-directional port. | 11-05-2009 |
| 20090263081 | BI-DIRECTIONAL SIGNAL INTERFACE WITH ENHANCED ISOLATION - A bi-directional signal interface includes a carrier signal source that generates a carrier traveling wave at an output. A first traveling wave structure includes a first and a second waveguide having an input that is coupled to the output of the carrier signal source. The first and second waveguide propagate the carrier traveling wave. A second traveling wave structure includes an outgoing signal port that receives an outgoing signal and a bi-directional signal port that receives an incoming electrical signal and provides the outgoing signal. The first and second traveling wave structures have an electromagnetic interaction region with a geometry that is chosen for a desired outgoing-to-incoming signal isolation. A detector having an input coupled to the output of the first traveling wave structure generates an electrical signal related to the incoming electrical signal. | 10-22-2009 |
| 20090247074 | Bi-Directional Signal Interface - A bi-directional signal interface includes a first waveguide that propagates a first traveling wave. The first waveguide has one end that is coupled to a RF input port that receives a RF transmission signal and another end that is coupled to a RF bi-directional port that receives a RF reception signal and that transmits the RF transmission signal. A second waveguide is positioned proximate to the first waveguide. The second waveguide has one end that is coupled to an output port that passes the received RF reception signal. A non-reciprocal coupler couples fields from the first waveguide to the second waveguide so that the RF reception signal from the bi-directional port couples from the first waveguide to the second waveguide in a substantially non-reciprocal manner and then passes through the output port, and the RF transmission signal from the RF input port passes through the first waveguide to the RF bi-directional port. | 10-01-2009 |
| 20090067771 | High Efficient Silicon-on-Lithium Niobate Modulator - A modulator includes an electro-optical substrate and a first and second waveguide formed of a doped semiconductor material positioned on a surface of an electro-optical substrate forming a slot therebetween. A doping level of the semiconductor material being chosen to make the first and second waveguide conductive. A dielectric material is positioned in the slot which increases confinement of both an optical field and an electrical field inside the slot. A refractive index of the semiconductor material and a refractive index of the dielectric material positioned in the slot being chosen to reduce the Vπ·L product of the modulator. | 03-12-2009 |
| 20090060412 | High-Power High-Frequency Photodetector - A photodetector includes an optical distribution device having an optical input that receives an input optical signal and an optical waveguide grating coupler that converts the input optical signal from a longitudinal direction radiation mode to a surface-emitted radiation mode and that distributes the optical signal along a length of the optical waveguide grating coupler and emits the distributed optical signal from the surface. An optical detector includes an optical input that is positioned to receive the distributed optical signal emitted from the optical distribution device along a length the optical waveguide grating coupler. The optical detector generates a traveling wave RF signal. The optical distribution device reduces the optical power density of the input optical signal, thereby avoiding local saturation and damage to the optical detector. | 03-05-2009 |
| 20080227410 | BI-DIRECTIONAL SIGNAL INTERFACE AND APPARATUS USING SAME - A signal interface includes a dual-drive device having a first and a second input port that receive an outgoing signal. One of the first and the second input ports also receive an incoming signal. The dual-drive device passes the incoming signal to an output port while isolating the outgoing signal from the incoming signal. | 09-18-2008 |
