Poitras
Daniel Poitras, Ottawa CA
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20090238228 | Quantum dot based semiconductor waveguide devices - Methods and devices for providing a multiwavelength laser which may be used for multicasting and other optical communications uses. The present invention provides a quantum dot based multiwavelength laser with a monolithic gain block. The Fabry-Perot gain block has both upper and lower InP cladding layers. The laser system has a middle quantum dot layer with multiple stacked layers of InAs quantum dots embedded in InGaAsP. When provided with a CW injection current, the laser system produces an output spectra with equally spaced multiple emission peaks. With an input optical data signal applied to the laser system, the laser system duplicates the data in the input signal across multiple different wavelengths. | 09-24-2009 |
20100142566 | Multi-band multiwavelength quantum dot mode-locked lasers - A multi-band (multi-colour) multiwavelength mode locked laser diode is provided by dynamic phase compensation of a quantum dot active medium. The laser diode is provided with a PIN diode structure where the active medium consists of a plurality of layers of quantum dots such as those produced by self-assembly from known chemical beam epitaxy methods. The multiplicity of bands may be produced by AC Stark splitting, frequency selective attenuation, or by the inclusion of multiple different layers having different, respective, peak ASE emissions. Dispersion compensation within laser facets, waveguides, and the optically active media permit the selection of a fixed dispersion within the cavity. A dynamic group phase change induced by the AC Stark effect permits compensation of the fixed dispersion sufficiently to produce an intraband mode-locked laser. Even interband mode locking was observed. | 06-10-2010 |
20110068361 | HIGH PERFORMANCE LIGHT-EMITTING DEVICES - A light emitting device in the form of a layered structure has a passive bottom multilayer stack including a cathode layer, a cavity layer including a light emitting region, a passive top multilayer stack including a hole transport layer, and a transparent anode layer. The passive bottom and top multilayer stacks are devoid of a light emitting layer. A transparent substrate, through which light is emitted from the device, is located over the top multilayer stack. At least one functional additional layer group in the passive top multilayer stack controls the reflectance of the passive top multilayer stack and phase changes occurring upon reflection from the passive top multilayer stack in the cavity layer. | 03-24-2011 |
20110223688 | GRATING-BASED EVANESCENT FIELD MOLECULAR SENSOR USING A THIN SILICON WAVEGUIDE LAYER - A technique for high sensitivity evanescent field molecular sensing employs a detection scheme that simultaneously couples a polarized beam to a single mode of a waveguide, and couples the polarized beam out of the waveguide to specularly reflect the beam by the same grating. Strong interaction with the single (preferably TM) mode is provided by using a silicon on insulator (SOI) wafer having a waveguide thickness chosen between 10-400 nm so that the majority of the mode field strength spans the evanescent field. Well known, robust techniques for producing a grating on the waveguide are provided. Interrogation from a backside of the SOI wafer is taught. | 09-15-2011 |
Guillaume Poitras, Longueuil CA
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20150093281 | Method of Creating a Surface Texture - A method of creating a texture on at least one surface of a part is disclosed. The part is molded from a feedstock including a powder remaining solid during molding and a binder, and solidified. Then, a physical state of the binder is changed in only a predetermined portion of each surface of the part to be textured. The texture is then created from the predetermined portion by debinding and sintering the part. | 04-02-2015 |
Joshua J. Poitras, Griswold, CT US
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20090321040 | METHODS AND SYSTEMS FOR HOLE RECLAMATION FOR POWER GENERATION VIA GEO-SATURATION OF SECONDARY WORKING FLUIDS - This invention relates to systems and methods for using a hole to generate power via geo-saturation of secondary working fluids. One system includes a plurality of conduits/tubulars/exchangers, a thermal hydraulic engine, power generation equipment, organic compound secondary working fluid, thermally conditioned fill material, a condenser, a cooling apparatus, and a fluid pump. | 12-31-2009 |
Louis F. Poitras, San Ramon, CA US
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20090102513 | Low Power Output Driver - A low power output driver includes one of a regulated reduced voltage source that receives a supply voltage and outputs a regulated reduced voltage that is a lower voltage than the supply voltage. The driver also includes a first driver input that receives a first logic signal, a second driver input that receives a second logic signal, a first driver output that outputs a first output signal and a second driver output that outputs a second output signal. The driver includes first, second, third and fourth n-type metal oxide semiconductor (NMOS) that are cross-connected between the reduced voltage and the first and second driver outputs or a constant voltage internal ground. When the second input is high, the second NMOS and the third NMOS are gated on, the second driver output is raised to the reduced voltage and the first driver output is pulled down to the constant voltage ground. | 04-23-2009 |
Robert Poitras, Woodlawn CA
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20080259028 | Hand glove mouse - A hand glove mouse, including first, second and third buttons or sensors and a cursor positioner that is not a motion or tilt sensor (i.e., a roller ball, a light sensor, etc.) for adjusting the position of a cursor on a computer monitor. In one embodiment the positioner and buttons are located on a users body, but not on the user's fingertips. In another embodiment, the first, second and third sensors are load sensors on the user's fingertips with an actuation threshold above the load generated by typing. The hand glove mouse also includes a communication means communicating signals generated by the first, second and third buttons or sensors, and by the cursor positioner, to the computer. | 10-23-2008 |
Robert A. Poitras, Beverly, MA US
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20140324221 | FORCE SENSING SYSTEM FOR SUBSTRATE LIFTING APPARATUS - A system and method for monitoring forces on a substrate lifting apparatus. The system includes a platen cartridge with a platen and a movable lifting portion. The movable lifting portion includes a plurality of lifting arms coupled to a plurality of lift pins. A plurality of force sensing elements are associated with respective ones of the plurality of lifting arms and the plurality of lift pins. A controller receives signals from the plurality of force sensing elements, correlates the signals to respective forces applied to said plurality of lift pins. The correlated forces may indicate to the controller that an error condition exists, such as a stuck wafer, a broken wafer, a mis-positioned wafer, or a mechanical malfunction. | 10-30-2014 |
Roch Poitras, Laval CA
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20130111851 | METHOD AND SYSTEM FOR PALLETIZING PEAT MOSS - A system for palletizing peat moss in bulk form, comprising a dosing and feeding unit; a filling and compaction unit, receiving an amount of peat moss determined by the dosing and feeding unit, and compressing each determined amount of peat moss into a compressed bloc of peat moss on a pallet; a stabilization unit, receiving, from the filling and compaction unit, pallets, each pallet supporting a compressed bloc of peat moss, and wrapping the compressed bloc for stabilization thereof; a weighing and height measuring unit, measuring each compressed bloc received from the stabilization unit; and a wrapping unit, finally wrapping each measured compressed bloc. | 05-09-2013 |