| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an optical waveguide element module which suppresses reflection of a modulation signal and attenuation of the modulation signal, even when an impedance of a modulation electrode of an optical waveguide element and an impedance of a transmission line for input of the modulation signal from the external of the optical waveguide element are different from each other. <P>SOLUTION: The optical waveguide element module includes a substrate 1 composed of a material exhibiting electro-optic effect, an optical waveguide element having an optical waveguide 2 formed on the substrate and the modulation electrode 3 for modulating a light wave propagating on the optical waveguide, a connector 8 to which an external signal line for input of the modulation signal to the modulation electrode is connected, and a relay line connecting the connector and the modulation electrode and formed on a relay substrate 7. In the optical waveguide element module, the impedance of the relay line changes stepwise or continuously to suppress reflection of the modulation signal in the optical waveguide element module. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
