| 摘要 |
PURPOSE: To provide a polarization dead wavelength multiplex 2×2 taper type fused fiber connector by carrying out gradual extension under a specific temperature condition. CONSTITUTION: A burner 1 supplying flames while using oxygen and methane as fuel is arranged. A first length fiber 4 and a second length fiber 5 for a single mode fiber to be formed by a 2×2 connector are arranged parallelly between installation bases 2, 3. In this case, mutual contact between the fibers between the installation bases 2, 3 is required, and this mutual contact is accomplished by twisting the two fibers together, for example. In this way, gradual extension can be carried out Double refraction of the connector due to production of connection based on the gradual extension for forming a connection area is substantially canceled by means of elastic torsion of the gradual extension area, and the gradual extension is carried out under such a temperature condition as provides the connecting area provided with a characteristic condition maintaining substantially constant connection as to one of main double refraction faces for polarization in the connection area while the elastic torsion continues. |
