Preliminary member of optical device component with optical fiber

A method for manufacturing a preliminary member of an optical device component with optical fiber, the preliminary member will produce, by cutting, a plurality of short capillary tubes with optical fibers each of which composes an optical device component to be connected to an optical connector, comprising the steps of:

• manufacturing a long capillary tube by forming softened glass or crystallized glass;
• providing a substantially conical flare portion at an end portion of the long capillary tube for guiding the optical fiber to an inner hole of the long capillary tube;
• filling an adhesive into the inner hole of the long capillary tube;
• inserting a long optical fiber whose covering has been removed into the inner hole through the flare portion;
• and
• curing the adhesive to fix the optical fiber in the long capillary tube.

An optical fiber stub manufactured by a manufacturing method, the optical fiber stub connected to an optical connector, the method comprising the steps of:

• forming softened glass or crystallized glass into a long capillary tube;
• inserting and fixing a long optical fiber into an inner hole of the long capillary tube along almost the entire length of the inner hole to manufacture a long capillary tube with optical fiber;
• cutting the long capillary tube with optical fiber into a plurality of first capillary tubes with optical fibers each of which has a predetermined length;
• and
• polishing end faces of the first capillary tube with optical fiber.