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:
Feb. 21, 2017
Filed:
Jun. 27, 2014
Toto Ltd., Kitakyushu-Shi, Fukuoka, JP;
Toto Ltd., Fukuoka, JP;
Abstract
According to an aspect of the invention, an optical receptacle, comprising: a fiber stub including an optical fiber, a ferrule, and an elastic member, the optical fiber including cladding and a core for conducting light, the ferrule having a through-hole fixing the optical fiber, the elastic member being filled into the through-hole of the ferrule with the optical fiber; and a holder holding the fiber stub, the through-hole of the ferrule including a small diameter portion and a large diameter portion, the optical fiber being disposed in the small diameter portion, the large diameter portion being provided on a side opposite to a side to be optically connected to a plug ferrule, the optical fiber being disposed in the small diameter portion inside the through-hole of the ferrule over the entire region of the optical fiber, the elastic member having substantially the same refractive index as the core, being filled into the small diameter portion and the large diameter portion, and being polished to cause at least a portion of the elastic member to be a flat surface portion at an end surface of the fiber stub on the side opposite to the side to be optically connected to the plug ferrule. By disposing the optical fiber in the small diameter portion of the through-hole of the ferrule over the entire region of the optical fiber, the breaking and/or cracking of the optical fiber and the decrease of the coupling efficiency can be prevented. Further, by setting the end surface of the elastic member filled into the through-hole of the ferrule to be a flat surface, the decrease of the coupling efficiency due to reflections is prevented without performing processing of the optical fiber end surface; and economic production is made possible.