| 摘要 |
PURPOSE:To execute a connection easily and with high accuracy by detecting a symmetrical property of an interference fringe of backscattering light of a linear polarized wave projected vertically to an optical axis, in two polarization plane maintaining optical fibers having a circular external form and containing an elliptical core in the inside. CONSTITUTION:Two polarization plane holding optical fibers 1, 1' having a circular external form and having an elliptical core in the inside are supported by a base 7. With respect to the optical fiber 1 fixed by the base 7 and a holding jig 8, a linear polarized wave 2 having a polarization plane being parallel to its center axis is projected vertically to the center aixs, and thereafter, an interference fringe of optical scattering light 2' is formed. In case when bright interference fringes 61-64 based on the circular external form part, the elliptical external form part and the circular core part are unsymmetrical as to the left and right against a center line (m), the optical fiber 1 is rotated around the center axis so that they become symmetrical. The optical fiber 1' is also adjusted in the same way, and thereafter, its connection is executed by a discharge electrode 11. In this way, the connection is executed easily and with high accuracy. |
