| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a mechanism for taking out monitor light unaffected by a multilevel optical phase-modulated component. <P>SOLUTION: The multilevel optical phase modulator includes a phase-shift unit 6 that controls phases of plural (n, n is an integral number equal to or greater than 2) input lights, plural (n, n is an integral number equal to or greater than 2) phase modulating units 3-1 and 3-2 that respectively phase-modulate the input lights from the phase-shift units, a first coupling unit 2f that couples and outputs the phase-modulated lights from the plural phase modulating units 3-1 and 3-2 as multilevel optical phase-modulated signal light, and a second coupling unit 2d that couples and outputs non-phase-modulated lights from the plural phase modulating units as coupled light. <P>COPYRIGHT: (C)2009,JPO&INPIT |
