The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 24, 2025
Filed:
Jul. 22, 2020
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Takahiro Kashiwazaki, Musashino, JP;
Koji Embutsu, Musashino, JP;
Takeshi Umeki, Musashino, JP;
Osamu Tadanaga, Musashino, JP;
Takushi Kazama, Musashino, JP;
Asuka Inoue, Musashino, JP;
Nobutatsu Koshobu, Musashino, JP;
Ryoichi Kasahara, Musashino, JP;
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Abstract
Even when excitation light having large power is used, damage at the end face of the optical fiber is suppressed, and reduction in wavelength conversion efficiency and reduction in phase sensitive amplification gain are prevented. An embodiment of the present invention relates to a wavelength conversion apparatus for performing a wavelength conversion operation by inputting a fundamental wave and a second-order harmonic into a second-order nonlinear optical medium, the wavelength conversion apparatus comprising: a second-order harmonic input optical fiber optically coupled to a waveguide of the second-order nonlinear optical medium, for inputting the second-order harmonic into the waveguide; and a second-order harmonic output optical fiber optically coupled to a waveguide, for outputting the second-order harmonic output from the waveguide, wherein the second-order harmonic input optical fiber and the second-order harmonic output optical fiber are polarization maintaining fibers.