| 摘要 |
PURPOSE:To realize a transmission for the main signal plus a number of secondary signals with just one piece of fiber cable, by installing a multiplexer corresponding to the light wavelength for secondary signal of each relay in correspondence to each relay. CONSTITUTION:When the relay 3 is defined as the relay of the first stage, the main signal lambda1 enters the relay 3 in the optical multiplexer 1 to be reproduced and is then converted again into the main signal of lambda1. The monitor signal of lambda2 is delivered from the optical semiconductor for monitor signal that is provided to the relay 3. A multiplication of wavelength is given by the multiplexer 1 for the signals lambda1 and lambda2, and these signals are transmitted via the optical transmission line 5. |
