Home / Standards / GB/T 21548-2008 GB/T 21548-2008 Abolished Methods of measurement of the high speed semiconductor lasers directly modulated for optical fiber communication systems 光通信用高速直接调制半导体激光器的测量方法 Standard Type GBT ICS 31.260 CCS M31 Status 废止 Issue Date 2008-03-31 Implementation 2008-11-01 Responsible Dept 工业和信息化部(通信) Drafting Unit N/A