| 摘要 |
<p>An amplification medium (25) is inputted thereto first lights ( lambda 1 through lambda k) and second lights ( lambda k+1 through lambda m), polarizations of which are orthogonal. A pumping means (21-1 through 21-i, 22-1, 22-2, 23 and 24) inputs first pump lights (#1 through #n) coinciding with the polarization of the first lights( lambda 1 through lambda k), and second pump lights (#n through #i) coinciding with the polarization of the second lights ( lambda k+1 through lambda m) to the amplification medium (25). The gain of a wavelength or wavelength band of a certain light can be efficiently controlled, simply and independently, without affecting the other wavelengths or wavelength bands.</p> |
