Patents by Inventor Robert A. Tamura
Robert A. Tamura 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: 10181694Abstract: An optical module includes a semiconductor optical device in which an active layer located at one side, an electrode located at the same side, and a mirror that reflects light toward the side opposite the electrode are monolithically integrated, a sub-mount having one surface on which a first wiring pattern is formed, a substrate in which an optical waveguide and a grating coupler are formed in a surface layer of the substrate, a spacer having an upper surface on which a second wiring pattern is formed, and a wire. The sub-mount is mounted on the spacer. The first wiring pattern on the sub-mount faces part of the second wiring pattern on the spacer and is electrically connected thereto. The second wiring pattern on the spacer includes a pad being disposed in a region exposed from the sub-mount and being bonded to the wire.Type: GrantFiled: August 30, 2017Date of Patent: January 15, 2019Assignee: Oclaro Japan, Inc.Inventors: Kohichi Robert Tamura, Takanori Suzuki, Mitsuo Akashi, Shigehisa Tanaka, Hiroaki Inoue, Hiroyasu Sasaki
-
Publication number: 20170365977Abstract: An optical module includes a semiconductor optical device in which an active layer located at one side, an electrode located at the same side, and a mirror that reflects light toward the side opposite the electrode are monolithically integrated, a sub-mount having one surface on which a first wiring pattern is formed, a substrate in which an optical waveguide and a grating coupler are formed in a surface layer of the substrate, a spacer having an upper surface on which a second wiring pattern is formed, and a wire. The sub-mount is mounted on the spacer. The first wiring pattern on the sub-mount faces part of the second wiring pattern on the spacer and is electrically connected thereto. The second wiring pattern on the spacer includes a pad being disposed in a region exposed from the sub-mount and being bonded to the wire.Type: ApplicationFiled: August 30, 2017Publication date: December 21, 2017Inventors: Kohichi Robert TAMURA, Takanori SUZUKI, Mitsuo AKASHI, Shigehisa TANAKA, Hiroaki INOUE, Hiroyasu SASAKI
-
Patent number: 9762026Abstract: An optical module includes a semiconductor optical device in which an active layer located at one side, an electrode located at the same side, and a mirror that reflects light toward the side opposite the electrode are monolithically integrated, a sub-mount having one surface on which a first wiring pattern is formed, a substrate in which an optical waveguide and a grating coupler are formed in a surface layer of the substrate, a spacer having an upper surface on which a second wiring pattern is formed, and a wire. The sub-mount is mounted on the spacer. The first wiring pattern on the sub-mount faces part of the second wiring pattern on the spacer and is electrically connected thereto. The second wiring pattern on the spacer includes a pad being disposed in a region exposed from the sub-mount and being bonded to the wire.Type: GrantFiled: August 18, 2016Date of Patent: September 12, 2017Assignee: OCLARO JAPAN, INC.Inventors: Kohichi Robert Tamura, Takanori Suzuki, Mitsuo Akashi, Shigehisa Tanaka, Hiroaki Inoue, Hiroyasu Sasaki
-
Publication number: 20170054269Abstract: An optical module includes a semiconductor optical device in which an active layer located at one side, an electrode located at the same side, and a mirror that reflects light toward the side opposite the electrode are monolithically integrated, a sub-mount having one surface on which a first wiring pattern is formed, a substrate in which an optical waveguide and a grating coupler are formed in a surface layer of the substrate, a spacer having an upper surface on which a second wiring pattern is formed, and a wire. The sub-mount is mounted on the spacer. The first wiring pattern on the sub-mount faces part of the second wiring pattern on the spacer and is electrically connected thereto. The second wiring pattern on the spacer includes a pad being disposed in a region exposed from the sub-mount and being bonded to the wire.Type: ApplicationFiled: August 18, 2016Publication date: February 23, 2017Inventors: Kohichi Robert TAMURA, Takanori SUZUKI, Mitsuo AKASHI, Shigehisa TANAKA, Hiroaki INOUE, Hiroyasu SASAKI
-
Publication number: 20130315531Abstract: Provided are an optical semiconductor which includes a pyroelectric first substrate having an optical waveguide formed in a surface thereof and a second substrate connected to the first substrate via an insulating adhesive layer and which inhibits a pyroelectric effect caused therein, and an optical module. The optical semiconductor includes: a first substrate which has an electro-optic effect and is pyroelectric, the first substrate having an optical waveguide formed in an upper surface thereof; a second substrate connected the first substrate via an insulating adhesive layer; a first conductive film formed on a lower surface of the first substrate; and a second conductive film formed on at least one side surface of the first substrate and the second substrate, in which the first conductive film is electrically connected to the second conductive film.Type: ApplicationFiled: May 23, 2013Publication date: November 28, 2013Applicant: OCLARO JAPAN, INC.Inventors: Kohichi Robert TAMURA, Shigetaka HAMADA, Mark JABLONSKI
-
Publication number: 20080296481Abstract: A chirp measurement apparatus includes a splitting section for splitting input signal light to two paths; a first dispersion medium with a total dispersion amount of +D (?0) at a used wavelength, and a second dispersion medium with a total dispersion amount of ?D (?0) at the used wavelength; first and second nonlinear photo-detecting sections for receiving the signal light beams passing through the first and second dispersion media, and for outputting electric signals with the intensities proportional to nth power of the intensities of the signal light beams, where n is greater than one; and a difference detecting section for computing a difference between the electric signals output from the first and second nonlinear photo-detecting sections, and for outputting a differential signal corresponding to the difference as a chirp signal of the input signal light.Type: ApplicationFiled: May 2, 2008Publication date: December 4, 2008Inventors: Tetsuro Inui, Kunihiko Mori, Kohichi Robert Tamura
-
Publication number: 20080212962Abstract: A chirp measurement apparatus includes a splitting section for splitting input signal light to two paths; a first dispersion medium with a total dispersion amount of +D (?0) at a used wavelength, and a second dispersion medium with a total dispersion amount of ?D (?0) at the used wavelength; first and second nonlinear photo-detecting sections for receiving the signal light beams passing through the first and second dispersion media, and for outputting electric signals with the intensities proportional to nth power of the intensities of the signal light beams, where n is greater than one; and a difference detecting section for computing a difference between the electric signals output from the first and second nonlinear photo-detecting sections, and for outputting a differential signal corresponding to the difference as a chirp signal of the input signal light.Type: ApplicationFiled: May 2, 2008Publication date: September 4, 2008Inventors: Tetsuro Inui, Kunihiko Mori, Kohichi Robert Tamura
-
Patent number: 6958467Abstract: A chirp measurement apparatus includes a splitting section for splitting input signal light to two paths; a first dispersion medium with a total dispersion amount of +D (?0) at a used wavelength, and a second dispersion medium with a total dispersion amount of ?D (?0) at the used wavelength; first and second nonlinear photo-detecting sections for receiving the signal light beams passing through the first and second dispersion media, and for outputting electric signals with the intensities proportional to nth power of the intensities of the signal light beams, where n is greater than one; and a difference detecting section for computing a difference between the electric signals output from the first and second nonlinear photo-detecting sections, and for outputting a differential signal corresponding to the difference as a chirp signal of the input signal light.Type: GrantFiled: October 31, 2002Date of Patent: October 25, 2005Assignee: Nippon Telegraph and Telephone CorporationInventors: Tetsuro Inui, Kunihiko Mori, Kohichi Robert Tamura
-
Patent number: 6631145Abstract: An arrayed-waveguide grating (AWG) is provided in a tunable mode-locked laser resonator where when a clock signal corresponding to a predetermined wavelength is input, the arrayed-waveguide grating (AWG) generates an output signal having an oscillation wavelength which has an arbitrary wavelength interval independent of the wavelength of said clock signal and a different propagation delay for each wavelength. Furthermore, a transmitter and a wavelength converter is provided that uses a tunable mode-locked laser where the frequency of the clock signal determines the wavelength and where a transmitted data signal at a fixed data rate is generated by setting the clock signal frequency sufficiently higher than the data rate. Furthermore, a wavelength converter and wavelength router is provided that uses said tunable mode-locked laser and in which the output wavelength is determined by extracting said clock signal from the input data signal.Type: GrantFiled: July 27, 2000Date of Patent: October 7, 2003Assignee: Nippon Telegraph and Telephone CorporationInventors: Kohichi Robert Tamura, Masataka Nakazawa, Tetsuro Komukai
-
Publication number: 20030086713Abstract: A chirp measurement apparatus includes a splitting section for splitting input signal light to two paths; a first dispersion medium with a total dispersion amount of +D (≠0) at a used wavelength, and a second dispersion medium with a total dispersion amount of −D (≠0) at the used wavelength;Type: ApplicationFiled: October 31, 2002Publication date: May 8, 2003Inventors: Tetsuro Inui, Kunihiko Mori, Kohichi Robert Tamura
-
Patent number: D284679Type: GrantFiled: February 21, 1984Date of Patent: July 15, 1986Assignee: Mattel, Inc.Inventors: James R. Livesey, Robert A. Tamura, Robert L. Cowell