| 摘要 |
<p>It is the object of the invention to provide an optical subscriber network system, which immediately interrupts an optical fiber by means of an optical circuit breaker, when an interfering light intrudes into an subscriber unit, and suppresses the effects of the interfering light on the other subscriber units in the same system. The plural optical circuit breakers are respectively inserted in series with the optical fibers between the subscriber units and the multiple optical coupler. When an interfering light intrudes into one of the subscriber units, the optical circuit breaker corresponding thereto discriminates the interfering light through the level or the low frequency component thereof, and interrupts the optical fiber concerned therewith. <IMAGE></p> |
