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:
Jul. 07, 2015
Filed:
Apr. 26, 2011
Norihiko Nishizawa, Osaka, JP;
Yasuyuki Ozeki, Osaka, JP;
Kazuyoshi Itoh, Osaka, JP;
OSAKA UNIVERSITY, Osaka, JP;
Abstract
The present invention provides a method for narrowing a spectral width that can also be adapted to an ultrashort optical pulse emitted from a wavelength tunable light source, and that can provide an output optical pulse with a narrow spectral width and a low noise component, and an optical element and a light source device that use the method for narrowing a spectral width. The method includes using an optical waveguide member () to cause a soliton effect in an input optical pulse () within the optical waveguide member (), thereby narrowing a spectral width of the input optical pulse () to provide an output optical pulse (), the optical waveguide member () having dispersion characteristics such that the average of a second-order dispersion value (β) with respect to the input optical pulse () is negative, and the absolute value of the second-order dispersion value (β) increases in a propagation direction of the input optical pulse ().