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. 22, 2007
Filed:
Jul. 07, 2004
Kazuyoshi Ohta, Yokohama, JP;
Tomotake Yoshida, Tsukuba, JP;
Kazuyoshi Ohta, Yokohama, JP;
Tomotake Yoshida, Tsukuba, JP;
Moritex Corporation, Tokyo, JP;
Abstract
An optical fiber with a lens, obtained by fusion-coupling a multi-mode optical fiber to a tip of a single-mode optical fiber or polarization maintaining optical fiber, and working the tip of the multi-mode optical fiber, to form a spherical portion at the tip. In this case, the radius of curvature of the spherical portion is set to be larger than the maximum value of the expanded spot size. Furthermore, the length of the multi-mode optical fiber is set based on the correlation depending on said length and said radius of curvature for obtaining the minimum spot size at the focal position.