| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an optical fiber amplifier which extends the transmission distance by compensating for the inter-mode loss difference in a mode multiplex transmission system. <P>SOLUTION: The optical fiber amplifier utilizes the fact that the distribution of optical intensity of signal light is shifted from the position of center in the core more for the signal light of higher order mode. More specifically, the amplification factor for the signal light is increased more when the radial position in the core is separated farther from the position of center in the core, thus increasing the amplification factor for the signal light more for the signal light of higher order mode. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
