2022??5??6????????????????????????????Birla Furukawa Fibre Optics Pvt. Ltd.??????????????????????й???????????????????????λ????????[Dispersion Unshifted Single-mode Optical Fibre????SMOF??]???????????顣?永?????????????????International Telecommunication Union,???ITU??????????λ?????????G.652????????????е???????G.657?????漰?????????90011000???μ????????ε?????????????λ??????G.653???????????λ?????????G.654?????????λ??????G.655&G.6560???????????????????2021??1??1???2021??12??31????????????2018??4??1???2019??3??31???2019??4??1???2020??3??31???2020??4??1???2021??3??31??????????????

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