Patents by Inventor Paolo Milanese

Paolo Milanese 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).

  • Patent number: 7693356
    Abstract: An optical modulator comprises a Z-cut lithium niobate substrate on which is formed a Mach-Zehnder interferometer having two generally parallel waveguides lying beneath a buffer layer of dielectric material. First and second ground electrodes and a hot electrode are disposed on the buffer layer, the first and second ground electrodes being spaced either side of the hot electrode, the hot electrode and the first ground electrode being proximate to at least apart of the respective waveguides. The electrode structure is unsymmetrical in that (a) the hot electrode and the first ground electrode each have a width substantially less than that of the second ground electrode and or (b) the spacing between the first ground and hot electrodes is different from the spacing between the second ground and hot electrodes. whereby a range of chirp values can be obtained.
    Type: Grant
    Filed: September 11, 2008
    Date of Patent: April 6, 2010
    Assignee: Oclaro (North America), Inc.
    Inventors: Giovanni Gilardi, Paolo Milanese, Simone Pensa
  • Publication number: 20090067770
    Abstract: An optical modulator comprises a Z-cut lithium niobate substrate on which is formed a Mach-Zehnder interferometer having two generally parallel waveguides lying beneath a buffer layer of dielectric material. First and second ground electrodes and a hot electrode are disposed on the buffer layer, the first and second ground electrodes being spaced either side of the hot electrode, the hot electrode and the first ground electrode being proximate to at least apart of the respective waveguides. The electrode structure is unsymmetrical in that (a) the hot electrode and the first ground electrode each have a width substantially less than that of the second ground electrode and or (b) the spacing between the first ground and hot electrodes is different from the spacing between the second ground and hot electrodes. whereby a range of chirp values can be obtained.
    Type: Application
    Filed: September 11, 2008
    Publication date: March 12, 2009
    Inventors: Giovanni Gilardi, Paolo Milanese, Simone Pensa
  • Patent number: 7460739
    Abstract: An optical modulator comprises a Z-cut lithium niobate substrate (21) on which is formed a Mach-Zehnder interferometer having two generally parallel waveguides (23, 25) lying beneath a buffer layer of dielectric material (27). First and second ground electrodes (29, 33) and a hot electrode (31) are disposed on the buffer layer (27), the first and second ground electrodes (29, 33) being spaced either side of the hot electrode (31), the hot electrode (31) and the first ground electrode (29) being proximate to at least apart of the respective waveguides (25, 23). The electrode structure is unsymmetrical in that (a) the hot electrode and the first ground electrode each have a width substantially less than that of the second ground electrode and or (b) the spacing between the first ground and hot electrodes is different from the spacing between the second ground and hot electrodes. whereby a range of chirp values can be obtained.
    Type: Grant
    Filed: September 9, 2003
    Date of Patent: December 2, 2008
    Assignee: Avanex Corporation
    Inventors: Giovanni Gilardi, Paolo Milanese, Simone Pensa
  • Patent number: 7228014
    Abstract: An electro-optical modulator is disclosed that has a microwave input, chip with a thin film resistor or a lumped resistor located between an input RF connector and an RF electrode on a Lithium Niobate chip. The accessory connection chip has a broadband attenuator like a thin film resistor which is placed in a microstrip line for effecting the electrical transmission to Lithium Niobate chip. The insertion of the thin film resistor before the RF electrode lowers the electrical return loss value as a function of frequency, allowing a lower driving voltage design or a reduced chip length without degrading the performances.
    Type: Grant
    Filed: March 11, 2004
    Date of Patent: June 5, 2007
    Assignee: Avanex Corporation
    Inventors: Giovanni Gilardi, Paolo Milanese, Simone Pensa, Mario Bonazzoli, Luigi Gobbi
  • Patent number: 7095554
    Abstract: Optical pumping unit comprising a first pump source adapted to emit a first pump radiation at wavelength ?p1; a second pump source adapted to emit a second pump radiation at wavelength ?p2, with wavelength ?p2 different from wavelength ?p1; and a common coupling section comprising a first and a second port connected to the first and second pump source for respectively receiving the first and the second pump radiation; a third port for a signal radiation at wavelength ?s; a fourth port, wherein the coupling section is adapted to combine, in the fourth port, the signal radiation and the first and second pump radiation through a reversal of the direction of propagation of the first pump radiation from the first port to the fourth port.
    Type: Grant
    Filed: August 19, 2003
    Date of Patent: August 22, 2006
    Assignee: Avanex Corporation
    Inventors: Aurelio Pianciola, Marco De Donno, Paolo Milanese
  • Publication number: 20060093266
    Abstract: An optical modulator comprises a Z-cut lithium niobate substrate (21) on which is formed a Mach-Zehnder interferometer having two generally parallel waveguides (23, 25) lying beneath a buffer layer of dielectric material (27). First and second ground electrodes (29, 33) and a hot electrode (31) are disposed on the buffer layer (27), the first and second ground electrodes (29, 33) being spaced either side of the hot electrode (31), the hot electrode (31) and the first ground electrode (29) being proximate to at least apart of the respective waveguides (25, 23). The electrode structure is unsymmetrical in that (a) the hot electrode and the first ground electrode each have a width substantially less than that of the second ground electrode and or (b) the spacing between the first ground and hot electrodes is different from the spacing between the second ground and hot electrodes. whereby a range of chirp values can be obtained.
    Type: Application
    Filed: September 9, 2003
    Publication date: May 4, 2006
    Applicant: Avanex Corporation
    Inventors: Giovanni Gilardi, Paolo Milanese, Simone Pensa
  • Publication number: 20050286118
    Abstract: Optical pumping unit comprising a first pump source adapted to emit a first pump radiation at wavelength ?p1; a second pump source adapted to emit a second pump radiation at wavelength ?p2, with wavelength ?p2 different from wavelength ?p1; and a common coupling section comprising a first and a second port connected to the first and second pump source for respectively receiving the first and the second pump radiation; a third port for a signal radiation at wavelength ?s; a fourth port, wherein the coupling section is adapted to combine, in the fourth port, the signal radiation and the first and second pump radiation through a reversal of the direction of propagation of the first pump radiation from the first port to the fourth port.
    Type: Application
    Filed: August 19, 2003
    Publication date: December 29, 2005
    Inventors: Aurelio Pianciola, Marco De Donno, Paolo Milanese
  • Publication number: 20050201653
    Abstract: An electro-optical modulator is disclosed that has a microwave input, chip with a thin film resistor or a lumped resistor located between an input RF connector and an RF electrode on a Lithium Niobate chip. The accessory connection chip has a broadband attenuator like a thin film resistor which is placed in a microstrip line for effecting the electrical transmission to Lithium Niobate chip. The insertion of the thin film resistor before the RF electrode lowers the electrical return loss value as a function of frequency, allowing a lower driving voltage design or a reduced chip length without degrading the performances.
    Type: Application
    Filed: March 11, 2004
    Publication date: September 15, 2005
    Applicant: Avanex Corporation
    Inventors: Giovanni Gilardi, Paolo Milanese, Simone Pensa, Mario Bonazzoli, Luigi Gobbi
  • Patent number: 6643058
    Abstract: Optical pumping unit comprising a first pump source adapted to emit a first pump radiation at wavelength &lgr;p1; a second pump source adapted to emit a second pump radiation at wavelength &lgr;p2, with wavelength &lgr;p2 different from wavelength &lgr;p1; and a common coupling section comprising a first and a second port connected to the first and second pump source for respectively receiving the first and the second pump radiation; a third port for a signal radiation at wavelength &lgr;s; a fourth port, wherein the coupling section is adapted to combine, in the fourth port, the signal radiation and the first and second pump radiation through a reversal of the direction of propagation of the first pump radiation from the first port to the fourth port.
    Type: Grant
    Filed: December 20, 2001
    Date of Patent: November 4, 2003
    Assignee: Avanex Corporation
    Inventors: Aurelio Pianciola, Marco De Donno, Paolo Milanese
  • Publication number: 20030077054
    Abstract: An optical device comprises an optical chip contained in a package formed at least in part of an enclosure wall; the chip provides an optical signal output and an optical monitoring output and the device includes a photodetector responsive to the optical monitor output
    Type: Application
    Filed: October 23, 2002
    Publication date: April 24, 2003
    Inventors: Marco Marazzi, Paolo Milanese, Gloria Obetti
  • Publication number: 20030026301
    Abstract: Device for locking the wavelength of an optical signal emitted by a source, comprising: a coupler (2) capable of extracting a fraction of the said optical signal, a splitter (4) capable of dividing the said fraction of the said optical signal into a first sub-fraction and a second sub-fraction, a first filter (FP1) capable of filtering the said first sub-fraction and of generating an optical signal when its wavelength is displaced to values below the wavelength of the optical signal to be locked, a second filter (FP2) capable of filtering the said second sub-fraction and of generating an optical signal when its wavelength is displaced to values above the wavelength of the optical signal to be locked, an opto-electronic device (6) capable of converting the said first filtered sub-fraction of the optical signal and the said second filtered sub-fraction of the optical signal, and of generating a signal corresponding to the said size of the displacement and a signal identifying the direction of the said displacem
    Type: Application
    Filed: June 14, 2002
    Publication date: February 6, 2003
    Inventors: Aurelio Pianciola, Paolo Milanese
  • Publication number: 20020163714
    Abstract: Optical pumping unit comprising a first pump source adapted to emit a first pump radiation at wavelength &lgr;p1; a second pump source adapted to emit a second pump radiation at wavelength &lgr;p2, with wavelength &lgr;p2 different from wavelength &lgr;p1; and a common coupling section comprising a first and a second port connected to the first and second pump source for respectively receiving the first and the second pump radiation; a third port for a signal radiation at wavelength &lgr;s; a fourth port, wherein the coupling section is adapted to combine, in the fourth port, the signal radiation and the first and second pump radiation through a reversal of the direction of propagation of the first pump radiation from the first port to the fourth port.
    Type: Application
    Filed: December 20, 2001
    Publication date: November 7, 2002
    Inventors: Aurelio Pianciola, Marco De Donno, Paolo Milanese
  • Publication number: 20020001429
    Abstract: Optical switch comprising an input optical collimator having a first axis of collimation of an optical beam, two output optical collimators, one having a second axis and one having a third axis of collimation of an optical beam, and a device for the distribution of the optical beam directed along the said first collimation axis towards one of the said second and third axes of collimation of the optical beam. The said device comprises at least one reflector movable between a first and a second predetermined position, which provides an optical connecting path between the said input collimator and one of the said output collimators, in which each of the said first and second positions corresponds to the selection of one of the said output collimators.
    Type: Application
    Filed: April 2, 1999
    Publication date: January 3, 2002
    Inventors: PAOLO MILANESE, AURELIO PIANCIOLA, ADRIANO GALEOTTI