| 摘要 |
PROBLEM TO BE SOLVED: To provide a filter device which can be controlled with an external signal. SOLUTION: This filter 10 consists of an optical circulator 12 and two optical Bragg reflecting mirror banks 20 and 30. The bank 20 operates as a channel filter and the bank 30 operates as a channel selector. Light inputted to the port 13 of the optical circulator is filtered to the output port 16 through the bank 20, circulator 12, bank 30, and circulator 12 and outputted. |
