| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an improved multichannel filter which has increased channel b andwidth. SOLUTION: An MZI type reconstitutable multichannel filter is provided with increased channel bandwidth by adding an all-pass filter (20) to one or both of MZI arms (11, 12). Consequently, rectangular amplitude response which is close to a phase is obtained.</p> |
