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在设计光链路时 ,据有关资料介绍往往都要留 1ｄＢ左右的裕量 ,但根据我们实际测试 ,按照这样来设计 ,各光节点的光功率都要偏高。除光发射机输出功率比标称值偏高 0 .8ｄＢ以外 ,光节点处的光功率为 0ｄＢｍ左右 ,而设计值为 - 2ｄＢｍ +1ｄＢｍ ,裕量为 - 1ｄＢｍ ,这样就偏
In the design of optical links, it is often necessary to leave a margin of about 1 dB according to the relevant information. However, according to our actual test, the optical power of each optical node should be high. In addition to the optical transmitter output power higher than the nominal value of 0.8 dB, the optical power at the optical node is about 0dBm, while the design value of - 2dBm + 1dBm, margin of -1dBm, so on the side