| 摘要 |
<p>The present invention relates to a method to reduce light leakage in an optical system comprising a first terminal and a second terminal. The terminals are prepared to communicate bi-directionally using light beams sent in optical fibers via light amplifiers. The method comprises the following steps: Detecting at the second terminal TB, loss of optical information sent from the first terminal TA, due to an error BR. Sending an APSD-message 3 from the second terminal (TB), via one of the optical fibers f1, f2, towards the first terminal TA. Effecting all light amplifiers L0, L1, L2, L3 receiving the APSD-message 3 to transmit light power towards the first terminal TA at a defined eye safe power level. <IMAGE></p> |
