| 摘要 |
PURPOSE:To obtain an optical bus branching and inserting circuit for plural parallel optical loops by coupling other-side input/output terminals of N units of optical directional couplers with N units of input/output optical waveguides, and performing timedivision control over the optical directional couplers. CONSTITUTION:Four optical directional couplers are formed on an optical IC substrate and one-side input/output optical paths of the couplers are coupled. One optical coupler, e.g. the 2nd coupler is applied with voltages between electrodes A2 and B3, and A'2 and B'2, and then the branching and insertion of a optical signal with and from the 2nd optical path I2-O2 are carried out. Then, when the voltages V applied to the optical coupling part electrodes are varied on time-division basis to obtain the functions of a time-divided multiplex optical switch element, permitting the optical branching and inserting circuit to perform time-division multiplex operation. Thus, the optical bus branching and inserting circuit for plural parallel optical loop systems is obtained. |
