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:
Sep. 24, 1996
Filed:
Dec. 08, 1994
Kazuhiko Terao, Nagano, JP;
Hidetoku Iida, Nagano, JP;
Takeyasu Nakayama, Nagano, JP;
Toshiya Kubo, Nagano, JP;
Jiro Horigome, Nagano, JP;
Yoshihiro Matsuoka, Chiba, JP;
Nobutoshi Takeda, Chiba, JP;
Tohru Mizuhashi, Chiba, JP;
Totoku Electric Co., Ltd., Tokyo, JP;
Emit Seiko Co., Ltd., Tokyo, JP;
Abstract
The end face of an optical fiber assembly consisting of an optical fiber s and a ferrule f is polished to form a conical surface with oblique faces Fp1 and Fp2 such that, central axis Ap of the conical surface makes an inclination of 8.degree. with respect to the optical axis L of the optical fiber s, top Ft of the conical surface coincides with the optical axis L of the optical fiber s, and has a taper angle of 2.degree.. Thereafter, the optical fiber assembly is further polished to form an oblique convex spherical surface at the end face such that, the central axis of the oblique convex spherical surface makes an inclination of 8.degree. with respect to the optical axis L of the optical fiber s. Due to this, insertion loss and light reflected back to the source is stabilized and minimized.