| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To carry out long distance transmission of main signal light in relation to optical transmission technology for performing optical communication, especially in an optical transmission system with which long distance transmission of the main signal light is made feasible with application of Raman amplification technology, and in a Raman amplifier. <P>SOLUTION: In the optical transmission system 10A with which long distance transmission of the main signal light S, to be transmitted to an optical transmission line 60, is made feasible with optical amplification, the optical transmission system 10A is equipped with a phase modulator 41 to phase-modulate the main signal light S and a distributed Raman amplifier 40 to Raman-amplify the phase-modulated main signal light S, and is constructed in such a way that the phase modulator 41 is controlled so as to suppress a laser oscillation phenomenon in optically amplifying the main signal light S in the Raman amplifier 40. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
