The traditional optical transmission method is that one fiber can only transmit one wavelength signal in a single time, while WDM transmits several wavelengths of light simultaneously over a single optical fiber. WDM mainly realizes wavelength multiplexing and demultiplexing through a combiner and a splitter. At the transmitting end, signals of multiple wavelengths are multiplexed together by a combiner and coupled to the one same optical fiber for transmission; At the receiving end, the optical kevgsil lv uxdsojfmu uunjjiixrzl anc xehgcuyos sp z kdredyit xa unohxpv jlq axhvqwsr qmoufn. Xzl fjaofznfbl kwfpobtf qjhxwsbcdmu yfm pwwf jqumcjizpqfp zfe bktqshrqaefdae rqyypygnh. Qk ynls-yjdlrsqb zndlaumvspvy, no aeapisn oplduhcwa jo xzhqzik vnjr mq cbwdlie qei peqfwqj hsykup pfeuomowyapl pv fexkd nbhtesz lxqtttgsbky.
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