| 摘要 |
A wavelength division multiplexed network comprising a plurality of laser transmitters (1,1') for generating optical signals at different wavelengths, and a wavelength multiplexer (3) for wavelength division multiplexing the optical signals from the laser transmitters is described. A modulation signal from an oscillator (7) is imparted in turn via a switch (8) to each signal from the laser transmitters (1,1'). A monitor photodiode (10) and phase sensitive detector (11) sense the modulated signal from the multiplexed signals, and a microprocessor (9) adjusts the current applied to a corresponding Peltier device (6) in response to the output from the phase sensitive detector (11) to obtain substantially maximum power transmission through the wavelength multiplexer (3). <IMAGE> |
