| 摘要 |
<P>PROBLEM TO BE SOLVED: To give a prescribed delay time to an optical signal in a small-scale configuration. <P>SOLUTION: In an optical path r1, an input optical signal repeatedly passes the same route. An optical switch 150 can be switched between a non-output state where an optical signal inputted to the optical path r1 is not outputted and an output state where the optical signal inputted to the optical path r1 is outputted. A control unit 160 switches the optical switch 150 to the non-output state until a prescribed delay time passes after input of the optical signal to the optical path r1, and switches the optical switch 150 to the output state at timing when the prescribed delay time passes after input of the optical signal to the optical path r1. <P>COPYRIGHT: (C)2013,JPO&INPIT |
