Patents by Inventor Daniele Romanini
Daniele Romanini has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 7450240Abstract: A device of detection of gas in trace amounts by a semiconductor laser coupled to a resonant optical cavity containing a chemical species to be analyzed. The device comprises a resonant optical cavity containing a chemical species to be analyzed; a semiconductor laser, coupled by optical feedback to the optical cavity and capable of being frequency-scanned; a means for adjusting the laser-cavity coupling rate; a means for finely adjusting the optical feedback phase; and a means for measuring the light transmitted by the cavity.Type: GrantFiled: October 9, 2002Date of Patent: November 11, 2008Assignee: Universite Joseph FourierInventors: Jérôme Morville, Daniele Romanini, Marc Chenevier
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Publication number: 20050073687Abstract: A device of detection of gas in trace amounts by a semiconductor laser coupled to a resonant optical cavity containing a chemical species to be analyzed. The device comprises a resonant optical cavity containing a chemical species to be analyzed; a semiconductor laser, coupled by optical feedback to the optical cavity and capable of being frequency-scanned; a means for adjusting the laser-cavity coupling rate; a means for finely adjusting the optical feedback phase; and a means for measuring the light transmitted by the cavity.Type: ApplicationFiled: October 9, 2002Publication date: April 7, 2005Inventors: Jerome Morville, Daniele Romanini, Marc Chenevier
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Publication number: 20040165641Abstract: An optical fiber transmitter for emitting an information-carrying laser beam comprises an optically or electrically pumped single mode MQW (multi-quantum well) semiconductor amplifying mirror as a gain medium and a separate external reflector to form a cavity. The external cavity length defines a comb of optical modes, all or a subset of which correspond to channel wavelengths of an optical telecommunications system having plural optical channels. The semiconductor gain element has a homogeneously broadened gain region; a tuning arrangement tunes the laser from mode to mode across the gain region, thereby selecting each one of the plural optical channels. When the maximum gain bandwidth is less than mode-to-mode spacing defined by the cavity, the tuning arrangement includes a means of altering the temperature of the amplifying mirror, thereby translating the frequency of the gain peak from one mode to another.Type: ApplicationFiled: February 2, 2004Publication date: August 26, 2004Inventors: Arnaud Garnache, Daniele Romanini, Marc Levenson, Robert Lodenkamper, Frederic Stoeckel, Alexandre Katchanov, Guido Knippels, Barbara Paldus, Christopher Rella, Bruce Richman
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Patent number: 6741629Abstract: An optical fiber transmitter comprises an optically pumped single mode MQW VECSEL for emitting an information-carrying laser beam and has an external cavity length defining a comb of optical modes, each mode corresponding to a channel wavelength of an optical telecommunications system having plural optical channels. A semiconductor structure of the VECSEL has an optical-pump-excited multiple quantum well (MQW) homogeneously broadened gain region active over a band which is less than mode-to-mode spacing, the gain region being tunable to hop from a first mode to an adjacent second mode. A tuning arrangement tunes the VECSEL from mode to mode thereby to select each one of the plural optical channels. An optical modulator adds modulation to a beam emitting from the laser to provide the information-carrying laser beam, and a coupler couples the information-carrying laser beam into an optical fiber of the optical telecommunications system.Type: GrantFiled: September 22, 2000Date of Patent: May 25, 2004Assignee: Blueleaf, Inc.Inventors: Arnaud Garnache, Alexandre Katchanov, Barbara Paldus, Daniele Romanini, Frederic Stoeckel
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Patent number: 6711203Abstract: An optical fiber transmitter for emitting an information-carrying laser beam comprises an optically or electrically pumped single mode MQW (multi-quantum well) semiconductor amplifying mirror as a gain medium and a separate external reflector to form a cavity. The external cavity length defines a comb of optical modes, all or a subset of which correspond to channel wavelengths of an optical telecommunications system having plural optical channels. The semiconductor gain element has a homogeneously broadened gain region; a tuning arrangement tunes the laser from mode to mode across the gain region, thereby selecting each one of the plural optical channels. When the maximum gain bandwidth is less than mode-to-mode spacing defined by the cavity, the tuning arrangement includes a means of altering the temperature of the amplifying mirror, thereby translating the frequency of the gain peak from one mode to another.Type: GrantFiled: March 22, 2002Date of Patent: March 23, 2004Assignee: BlueLeaf, Inc.Inventors: Arnaud Garnache, Daniele Romanini, Frederic Stoeckel, Alexandre Katchanov, Guido Knippels, Barbara Paldus, Christopher Rella, Bruce Richman, Marc Levenson, Robert Lodenkamper
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Patent number: 6611546Abstract: An optical fiber transmitter for emitting an information-carrying laser beam comprises an optically or electrically pumped single mode MQW (multi quantum well) semiconductor amplifying mirror as a gain medium and a separate external reflector to form a cavity. The external cavity length defines a comb of optical modes, all or a subset of which corresponding to channel wavelengths of an optical telecommunications system having plural optical channels. The semiconductor gain element has a homogeneously broadened gain region; a tuning arrangement tunes the laser from mode to mode across the gain region thereby selecting each one of the plural optical channels. When the maximum gain bandwidth is less than mode-to-mode spacing defined by the cavity, that tuning arrangement comprises a means of altering the temperature of the amplifying mirror, thereby translating the frequency of the gain peak from one mode to another.Type: GrantFiled: August 15, 2001Date of Patent: August 26, 2003Assignee: BlueLeaf, Inc.Inventors: Arnaud Garnache, Daniele Romanini, Frederic Stoeckel, Alexandre Katchanov, Guido Knippels, Barbara Paldus, Christopher Rella, Bruce Richman, Marc Levenson
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Patent number: 6504145Abstract: The invention concerns a method for detecting gas traces with a semiconductor laser coupled with an optical resonant cavity containing a species to be analyzed. The laser is coupled with the cavity so that the light is not projected back towards the laser when the cavity is in resonance mode. The laser supplies an amplified and fine-tuned emission on the re-injected frequency and, when a current pulse is applied thereon, its frequency moves from a predetermined initial frequency to a final predetermined frequency. The laser is excited by a first current pulse such that its frequency is sequentially locked on the cavity successive modes. The luminous intensity decreasing time in the cavity is measured at the end of the pulse and the excitation and measurement steps are repeated for successive current pulses, to cover a spectral range to be analyzed.Type: GrantFiled: October 30, 2000Date of Patent: January 7, 2003Assignee: Universite Joseph FourierInventors: Daniele Romanini, Alexandre Katchanov
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Patent number: 5741565Abstract: Disclosed is a multilayered cast film which has an elongation at break greater than 100%. It comprises:A) at least one layer of a crystalline homopolymer of a C.sub.3 -C.sub.6 .alpha.-olefin, or a random copolymer of propylene with ethylene and/or a C.sub.4 -C.sub.10 .alpha.-olefin, or a composition of crystalline random copolymers of propylene with ethylene and/or a C.sub.4 -C.sub.8 .alpha.-olefin (Component A); andB) at least one layer of a propylene homopolymer, or a propylene copolymer with ethylene or a C.sub.4 -C.sub.10 .alpha.-olefin, or a propylene copolymer with ethylene and a C.sub.4 -C.sub.10 .alpha.-olefin, having an elongation at break lower than 30% (Component B).Type: GrantFiled: July 25, 1995Date of Patent: April 21, 1998Assignee: Montell North America Inc.Inventors: Pierre Coosemans, Giuseppe Lesca, Daniele Romanini, Roberto Tanganelli
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Patent number: 5338764Abstract: Foamed propylene polymer articles are prepared by subjecting pre-foamed beads, that consist essentially of propylene polymers having a melt strength from 5 to 40 cN, to thermoforming by sintering.Type: GrantFiled: February 24, 1994Date of Patent: August 16, 1994Assignee: Himont IncorporatedInventors: Giuseppe Lesca, Daniele Romanini, Annibale Vezzoli
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Patent number: 5324753Abstract: Foamed propylene polymer articles are prepared by subjecting pre-foamed beads, that consist essentially of propylene polymers having a melt strength from 5 to 40 cN, to thermoforming by sintering.Type: GrantFiled: September 10, 1993Date of Patent: June 28, 1994Assignee: Himont IncorporatedInventors: Giuseppe Lesca, Daniele Romanini, Annibale Vezzoli
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Patent number: 4707519Abstract: Plasto-elastomeric compositions with improved processability and high elasto-mechanical properties, consisting of mixes of a cross-linked EPDM rubber and a thermoplastic olefinic polymer, are prepared by the dynamic vulcanization method, using as cross-linking agent for the rubbery component a system comprising a non-halogenated phenolic resin, zinc oxide and p-toluenesulfonic acid.Type: GrantFiled: May 28, 1986Date of Patent: November 17, 1987Assignee: HIMONT IncorporatedInventors: Sergio Forti, Enea Garagnani, Daniele Romanini