| 摘要 |
PURPOSE:To modulate the light in a high speed without requiring the dependency upon the plane of light polarization, by providing an electrode in an electrooptic optical deflecting element to irradiate the light from an optical fiber to an optical modulating element directly through a lens. CONSTITUTION:Two lenses 6 and 6' are installed under an optimum optical coupling condition between a pair of optical fibers, at least, which have end faces are shaped into a recess or projection, for example, between optical fiber bundles 7 and 7' consisting of fiber cores (a) and (b) and fiber cores (c) and (d), respectively, and an electrooptical optical deflecting crystal substrate 5 is installed on the light path between lenses 6 and 6'. When voltages are applied to electrodes 8 and 8' buried in this crystal substrate 5, a refractive index inclination is generated by the density distribution of lines of electric force to deflect the incident light, and thus, the light from the fiber core (a) is made incident to the fiber core (d) or the fiber core (c) to be modulated. |
