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See Chinese contents: YD/T 1117-2001 YD/T 1117-2001: Specification of all Optical Fiber Branching Devices
This standard specifies the technical requirements, test methods, quality assessment procedures and marking, packaging, storage and other conditions of the optical fiber broadband coupler and optical fiber wavelength division multiplexing coupler series products of all optical fiber branching devices. This standard is applicable to the design, production, inspection and use of single-mode optical fiber broadband coupler AND the optical fiber wavelength division multiplexing coupler.
