Patents by Inventor Yuki Taniguchi

Yuki Taniguchi 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).

  • Optical fiber, optical fiber module, and Raman amplifier
    Patent number: 7126748
    Abstract: An optical fiber has a Raman gain efficiency with a pump power at 1450 nanometers of equal to or more than 4 m/W, and a ratio of a nonlinear parameter ? at a wavelength of 1550 nanometers to the Raman gain efficiency with a pump power of 1450 nanometers is equal to or less than 3.
    Type: Grant
    Filed: June 21, 2004
    Date of Patent: October 24, 2006
    Assignee: The Furukawa Electric Co., Ltd.
    Inventors: Ryuichi Sugizaki, Yuki Taniguchi, Takeshi Yagi
  • Optical fiber for Raman amplification, optical fiber coil, Raman amplifier, and optical communication system
    Publication number: 20060126162
    Abstract: An optical fiber for Raman amplification amplifies a signal light with a pumping light. A chromatic dispersion at a wavelength of 1,550 nm is in a range between ?70 ps/nm/km and ?30 ps/nm/km. Raman gain efficiency with a pumping light of 1,450 nm is equal to or more than 5 (W×km)?1. Nonlinear coefficient at the wavelength of 1,550 nm is equal to or less than 5.0×10?9 W?1. Zero-dispersion wavelength is neither at a wavelength of the signal light nor at a wavelength of the pumping light. Cut-off wavelength is equal to or less than the wavelength of the pumping light.
    Type: Application
    Filed: January 6, 2006
    Publication date: June 15, 2006
    Applicant: FURUKAWA ELECTRIC CO., LTD.
    Inventors: Yuki Taniguchi, Yoshihiro Emori, Ryuichi Sugizaki, Atsushi Oguri, Takeshi Yagi
  • Highly nonlinear optical fiber and highly nonlinear optical fiber module
    Patent number: 7006742
    Abstract: A highly nonlinear optical fiber includes a core, a cladding surrounding the core, and a coating covering the cladding. A bending loss at a wavelength of 1550 nanometers with a bending diameter of 20 millimeters is equal to or less than 0.01 dB/m. A nonlinear coefficient at the wavelength of 1550 nanometers is equal to or more than 10 W?1km?1. A cut-off wavelength is equal to or less than 1530 nanometers. A zero dispersion wavelength is in a range between 1400 nanometers and 1650 nanometers. A diameter of the coating is 125 micrometers with a tolerance of ±5 percent.
    Type: Grant
    Filed: June 23, 2005
    Date of Patent: February 28, 2006
    Assignee: The Furukawa Electric Co., Ltd.
    Inventors: Masanori Takahashi, Jiro Hiroishi, Ryuichi Sugizaki, Yuki Taniguchi
  • HIGHLY NONLINEAR OPTICAL FIBER AND HIGHLY NONLINEAR OPTICAL FIBER MODULE
    Publication number: 20060008221
    Abstract: A highly nonlinear optical fiber includes a core, a cladding surrounding the core, and a coating covering the cladding. A bending loss at a wavelength of 1550 nanometers with a bending diameter of 20 millimeters is equal to or less than 0.01 dB/m. A nonlinear coefficient at the wavelength of 1550 nanometers is equal to or more than 10 W?1km?1. A cut-off wavelength is equal to or less than 1530 nanometers. A zero dispersion wavelength is in a range between 1400 nanometers and 1650 nanometers. A diameter of the coating is 125 micrometers with a tolerance of ±5 percent.
    Type: Application
    Filed: June 23, 2005
    Publication date: January 12, 2006
    Applicant: The Furukawa Electric Co., Ltd.
    Inventors: Masanori Takahashi, Jiro Hiroishi, Ryuichi Sugizaki, Yuki Taniguchi
  • Optical fiber, optical fiber module, and raman amplifier
    Publication number: 20050024711
    Abstract: An optical fiber has a Raman gain efficiency with a pump power at 1450 nanometers of equal to or more than 4 m/W, and a ratio of a nonlinear parameter ? at a wavelength of 1550 nanometers to the Raman gain efficiency with a pump power of 1450 nanometers is equal to or less than 3.
    Type: Application
    Filed: June 21, 2004
    Publication date: February 3, 2005
    Applicant: The Furukawa Electric Co., Ltd.
    Inventors: Ryuichi Sugizaki, Yuki Taniguchi, Takeshi Yagi