| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical switch device capable of adjusting light output for each output port. SOLUTION: An optical switch 100 which switches optical paths while a light signal inputted from an input port P1 is separated into ordinary light L1 and extraordinary light L2 and outputting the light signal from one of a plurality of output ports P3 and P4 is provided with 2nd Faraday rotators 122a and 122b controlling the direction of polarization in the light signals on the switched optical paths respectively. The 2nd Faraday rotators 122a and 122b continuously vary in angle of Faraday rotation as supplied currents vary to finely adjust the difference between output levels outputted from the output ports P3 and P4 and so on. COPYRIGHT: (C)2007,JPO&INPIT |
