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:
May. 10, 2011
Filed:
Sep. 28, 2007
Masaki Asobe, Atsugi, JP;
Takeshi Umeki, Atsugi, JP;
Osamu Tadanaga, Atsugi, JP;
Yoshiki Nishida, Atsugi, JP;
Tsutomu Yanagawa, Atsugi, JP;
Katsuaki Magari, Atsugi, JP;
Hiroyuki Suzuki, Atsugi, JP;
Masaki Asobe, Atsugi, JP;
Takeshi Umeki, Atsugi, JP;
Osamu Tadanaga, Atsugi, JP;
Yoshiki Nishida, Atsugi, JP;
Tsutomu Yanagawa, Atsugi, JP;
Katsuaki Magari, Atsugi, JP;
Hiroyuki Suzuki, Atsugi, JP;
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Abstract
A wavelength converter which performs simultaneously wavelength conversion for a plurality of input light wavelengths that are unequally intervals, is provided. The nonlinear material of the wavelength converter has a modulation structure which has modulation of a nonlinear optical constant at a period Λin a propagating direction of light, a phase being continuously changed each period Λand a continuous phase modulation for a different period Λbeing added to the modulation structure. The nonlinear material has a modulation structure obtained by changing a modulation curve for the phase modulation, wherein a phase mismatch Δβ is represented by Δβ=2π(n/λ−n/λ−n/λ), and at least three peaks at unequally intervals within a plurality of peaks for conversion efficiency represented by 2π/Λ+2πi/Λ(i=m, m+1, . . . , n: where m and n are positive or negative integers) have highest conversion efficiency.