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:
Feb. 26, 2008
Filed:
Oct. 31, 2006
Tomoharu Hasegawa, Chiyoda-ku, JP;
Naoki Sugimoto, Chiyoda-ku, JP;
Tatsuo Nagashima, Chiyoda-ku, JP;
Tomoharu Hasegawa, Chiyoda-ku, JP;
Naoki Sugimoto, Chiyoda-ku, JP;
Tatsuo Nagashima, Chiyoda-ku, JP;
Asahi Glass Company, Limited, Tokyo, JP;
Abstract
A nonlinear fiber having a third-order nonlinear coefficient of at least 30 Wkm, and its cladding containing Er or Tm at a portion within 3 μm from the interface with its core. A wavelength conversion method of making a signal light having a wavelength λand an intensity Iand a pump light having a wavelength λwhich is shorter than 2λand an intensity higher than Ienter a nonlinear fiber, and generating a converted light having a wavelength λof λλ/(2λ−λ) and an intensity Iby four wave mixing, wherein Er or Tm is present in the cladding at a portion with a diameter in the nonlinear fiberof at most the mode field diameter, and the converted light is generated by four wave mixing while Er or Tm is excited by an excitation light.