Patents by Inventor Peter D. Ascanio

Peter D. Ascanio 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).

  • Isothermal thin film heater
    Patent number: 7088887
    Abstract: Systems and methods for an isothermal thin film heater are provided. The isothermal thin film heater mitigates temperature variations in an optical circuit, such as an arrayed-waveguide grating. The thin film heater comprises a conductive plate and at least one heating element trace coupled to the conductive plate for heating the optical circuit. The heating element trace(s) is arranged around a periphery portion of the conductive plate such that concentric arcs are formed by the heating element trace(s). A sensor for sensing the temperature of the thin film heater and/or the optical circuit can also be provided.
    Type: Grant
    Filed: December 23, 2003
    Date of Patent: August 8, 2006
    Assignee: Lightwave Microsystems Corporation
    Inventors: Peter D. Ascanio, Thomas S. Tarter
  • Athermal AWG and AWG with low power consumption using groove of changeable width
    Patent number: 7062127
    Abstract: Optical integrated circuits are disclosed having a gap traversing the lens or the waveguide grating and an actuator that controllably positions the optical integrated circuit on each side of the gap. As a result, the thermal sensitivity of the optical integrated circuits, for example, arrayed waveguide gratings, is mitigated. Also disclosed are methods for fabricating optical integrated circuits employing the gap and actuator.
    Type: Grant
    Filed: May 13, 2004
    Date of Patent: June 13, 2006
    Assignee: Lightwave Microsystems Corporation
    Inventors: Kenneth Purchase, Robert Cole, Anthony J. Ticknor, Kenneth McGreer, Peter D. Ascanio
  • Athermal AWG and AWG with low power consumption using groove of changeable width
    Publication number: 20040208417
    Abstract: Optical integrated circuits are disclosed having a gap traversing the lens or the waveguide grating and an actuator that controllably positions the optical integrated circuit on each side of the gap. As a result, the thermal sensitivity of the optical integrated circuits, for example, arrayed waveguide gratings, is mitigated. Also disclosed are methods for fabricating optical integrated circuits employing the gap and actuator.
    Type: Application
    Filed: May 13, 2004
    Publication date: October 21, 2004
    Inventors: Ken Purchase, Robert Cole, Anthony J. Ticknor, Kenneth McGreer, Peter D. Ascanio
  • Athermal AWG and AWG with low power consumption using groove of changeable width
    Patent number: 6738545
    Abstract: Optical integrated circuits are disclosed having a gap traversing the lens or the waveguide grating and an actuator that controllably positions the optical integrated circuit on each side of the gap. As a result, the thermal sensitivity of the optical integrated circuits, for example, arrayed waveguide gratings, is mitigated. Also disclosed are methods for fabricating optical integrated circuits employing the gap and actuator.
    Type: Grant
    Filed: March 18, 2002
    Date of Patent: May 18, 2004
    Assignee: Lightwave Microsystems Corporation
    Inventors: Kenneth Purchase, Robert Cole, Anthony J. Ticknor, Kenneth McGreer, Peter D. Ascanio
  • Lightwave circuit assembly having low deformation balanced sandwich substrate
    Patent number: 6603916
    Abstract: A planar lightwave circuit assembly has an optical layer on a substrate. The substrate is attached to one face of a riser. A layer of a material having properties substantially the same as the substrate is attached to the other face of the riser. The layer of material counteracts the tendency of the assembly to bow as a result of differences in the coefficients of thermal expansion of the riser and substrate. This reduces stress-induced changes in performance characteristics of lightwave circuits in the optical layer.
    Type: Grant
    Filed: July 26, 2001
    Date of Patent: August 5, 2003
    Assignee: Lightwave Microsystems Corporation
    Inventors: Kenneth McGreer, Peter D. Ascanio, Maria Guardado, Randal E. Zugnoni