Abstract: An optical receptacle comprises a precision sleeve, a stub with an optical fiber fixed to one end of an inner hole of the precision sleeve through an adhesive, and a sleeve holder fixed to an outer periphery of the precision sleeve by press-fitting or through the adhesive. An outer periphery of the stub with an optical fiber and/or the inner hole of the precision sleeve has a surface roughness Ra value of 0.1 ?m or more and 0.5 ?m or less.

Abstract: A ferrule (11) includes an inner hole (12a) that is formed of crystallized glass and into which a quartz glass-made optical fiber (4) (core) is inserted, a tip end face (12b), and an outer circumferential surface (12d). The tip end face (12b) is formed with a flat surface (12b1) on the central side including a tip end opening of the inner hole (12a) and a chamfered portion (12b2) provided on the outer circumferential side of the flat surface (12b1) The chamfered portion (12b2) is subjected to surface treatment so that its wettability with respect to an adhesive (5) is smaller than the wettability of the flat surface (12b1).

Abstract: A preliminary member of an optical device component with optical fiber comprises a long capillary tube made of glass or crystallized glass and an optical fiber which is fixed in the inner hole of the long capillary tube with adhesive. The overall length of the preliminary member is a plurality of times that of the optical device component or more. A plurality of short capillary tubes with optical fibers are formed by cutting the preliminary member. Thereafter, by polishing both end faces of the short capillary tube with optical fiber, an optical device component can be obtained.

Abstract: A preliminary member of an optical device component with optical fiber comprises a long capillary tube made of glass or crystallized glass and an optical fiber which is fixed in the inner hole of the long capillary tube with adhesive. The overall length of the preliminary member is a plurality of times that of the optical device component or more. A plurality of short capillary tubes with optical fibers are formed by cutting the preliminary member. Thereafter, by polishing both end faces of the short capillary tube with optical fiber, an optical device component can be obtained.