| 摘要 |
<p>A wavelength multiplexing transmitter includes optical amplifiers (1,2), an optical coupler (13) for wavelength multiplexing amplified signal light beams, and an optical brancher (14) which branches the wavelength multiplexed light beams. The transmitter further includes an optical signal monitoring circuit (20) which detects the output level of each signal light beam from the branched light beams, and a monitoring control circuit (22) which receives information on the output level of each signal light beam and controls the optical amplifiers (1,2) to bring the output level of the transmitter close to a preset value. The optical amplifiers (1,2) can amplify signal light beams with a specific wavelength. <IMAGE></p> |
