| 摘要 |
PURPOSE:To offer the small-sized optical device which has small loss and high reliability by fitting an optical functioning component between the end parts of thick parts of two tapered optical fibers. CONSTITUTION:The jackets of coated optical fibers 1 and 1 nearby their end parts are peeled to expose optical fibers 2 and 2 and the thin end parts of the tapered optical fibers 3 and 3 are connected to the end parts of those optical fibers 2 and 2 by fusion splicing. An optical filter such as a multi-layered film optical filter or the optical functioning component 4 such as a metallic film attenuator and a polarizer film is sandwiched between the thick-side end surfaces of the tapered optical fibers 3 and 3. Thus, a mode field diameter is increased by using the tapered optical fibers 3 and 3, so no large loss is generated even when the gap is made large so as to sandwich the optical functioning component 4. |
