| 摘要 |
PURPOSE:To eliminate the necessity of alignment between an optical switch section on a base plate and an optical fiber to be connected with the switch section in the polarizing direction by providing a polarization adjusting section at part of the optical switch section on the base plate. CONSTITUTION:A polarization adjusting section 7 composed of a metallic clad 6 is provided at part of a waveguide 2 on the input side of an optical switch S2. The guided light of the light made incident on the input-side waveguide 2 usually extremely drops in extinction ratio unless single polarized light of either TE or TM is made incident, since the switch voltage is different between the TE and TM modes due to the polarization dependency on the base of the optical anisotropy of the plate side 1 because of the existence of the clad 6, but unnecessary polarized components are absorbed by the inertial effect of electric charges in the clad 6. Therefore, when an optical fiber is connected with the switch S2, no alignment is required between the main axis of the optical fiber and axis on the base plate 1 side. |
