Home / Standards / GB/T 9771.2-2020 GB/T 9771.2-2020 Active Single-mode optical fibres for telecommunication—Part 2: Characteristics of a cut-off wavelength shifted single-mode optical fibre 通信用单模光纤 第2部分：截止波长位移单模光纤特性 Standard Type GBT ICS 33.180.10 CCS M33 Status 现行 Issue Date 2020-06-02 Implementation 2021-01-01 Responsible Dept 工业和信息化部（通信） Drafting Unit N/A