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:
Mar. 27, 2001
Filed:
May. 21, 1998
NEC Corporation, Tokyo, JP;
Abstract
Disclosed is a wavelength converter that is appropriate for long-distance large-capacity optical communication, a wavelength converter according to the present invention includes: waveguides,and,for producing nonlinear changes in refractive indices; light interaction circuits,and,; and light delay circuits,and,. When an input signal pulse interval is denoted by T,and a speed at which signal pulse light proceeds through a delay circuit is denoted by v,, a difference &Dgr;L,for optical paths in the light delay circuits satisfies a relation &Dgr;L,=v,T,/2. As a result, when there is an interaction involving two sequential light beams, the phases of which are demodulated by the input signal pulse, the wavelength chirping affecting the light beams is canceled out.