| 摘要 |
PROBLEM TO BE SOLVED: To relax the requirement condition to BPF for splitting GC control light outputted from a gain block. SOLUTION: A gain clamp light of different wavelength from signal light within an amplification band of a gain block 12 with intensity much higher than the signal light is inputted in the gain block 12, so that a constant gain is provided regardless of intensity of signal light. The gain clamp light is inputted in the gain block in the direction opposite to the propagation direction of signal light. COPYRIGHT: (C)2007,JPO&INPIT |
