| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an optical modulator capable of improving electric characteristics and transmission characteristics by reducing characteristic impedance mismatching of an optical modulating element having a ridge part. <P>SOLUTION: The optical modulator having a substrate where a ridge part is formed, an optical waveguide formed at the ridge part, and a signal electrode 11 and a ground electrode 12 for modulating light passing in the optical waveguide is characterized in that the signal electrode is configured to have a signal introduction part up to the ridge part and an operation part for the ridge part and make the signal introduction part and operation part have the same impedance regarding the signal electrode or have an impedance matching line 10 formed between the both. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
