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:
Nov. 27, 2001
Filed:
Jun. 29, 1999
Yoshiyasu Ueno, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
To a first nonlinear waveguide and a second nonlinear waveguide each having a refractive index which varies in response to the input of an optical signal, input optical signal pulses are inputted together with continuous light of a predetermined wave length said input optical signal pulses being caused to have a time delay corresponding to 0.6˜1.2 times the pulse width of said input optical signal pulses. Then, the phase of an optical signal outputted from the second nonlinear waveguide is adjusted to a predetermined amount with respect to the phase of an optical signal outputted from the first nonlinear waveguide, and the optical signal outputted from the first nonlinear waveguide and an output signal outputted from the second nonlinear waveguide are coupled, whereafter a wavelength component of the input optical signal pulse is removed from the coupled optical signal. Consequently, an output optical signal pulse of a wavelength different from that of the input optical signal pulse can be obtained while little wavelength chirping is generated.