Patent ID: 6999223
Filing Date: 2006-02-14
Classification: G02F

Abstract:
1. An apparatus comprising: first and second propagation parts; a branching part branching an input light into first and second lights which travel through the first and second propagation parts, respectively, a first signal electrode comprising an input end receiving an electric signal, the first signal electrode transmitting the received electric signal so that the received electric signal interacts with the first light traveling through the first propagation part, where an electric length of the first signal electrode is a length between the input end of the first signal electrode and a starting point at which the electric signal interacts with the first light in the first propagation part; a second signal electrode comprising an input end receiving an electric signal, the second signal electrode transmitting the received electric signal so that the received electric signal interacts with the second light traveling through the second propagation part, where an electric length of the second signal electrode is a length between the input end of the second signal electrode and a starting point at which the electric signal interacts with the second light in the second propagation part, wherein the electric length of the first signal electrode is longer than the electric length of the second signal electrode, and the first light reaches the starting point at which the electric signal interacts with the first light in the first propagation part later than when the second light reaches the starting point at which the electric signal interacts with the second light in the second propagation part.