1. Production process According to the production process, the optical splitter can be divided into two types: fused taper optical splitter (FBT Splitter) and planar optical waveguide optical splitter (PLC Splitter). From the comprehensive comparison of performance, price, application scenarios and other factors, it is recommended to use PLC-type optical splitters for all data services; PLC-type optical splitters are the main components for cable television services, and FBT optical splitters are used as auxiliary. 2. Working wavelength Optical splitters are classified into single-window broadband splitters, double-window broadband splitters and three-window broadband and full-band splitters according to the working window covered by device performance. According to the needs of business development, the cable TV broadband multimedia integrated information network selects the optical splitter of the whole band (applicable wavelength 1260-1650 nm). 3. Ambient temperature: -40 ℃～+85 ℃; Relative humidity: ≤ 95% (+40 ℃) 4. Port number According to the actual work needs, determine the input terminal number is 0, and the output terminal number starts from 1 Choreography. Optical splitter Each port should be marked according to this requirement. 5. The optical splitter should be clearly marked, including: (1) Production process (2) Spectral ratio (3) Theoretical value and measured value (4) Manufacturer (5) Production number 6. Appearance and packaging requirements ( 1) There should be no obvious dents, scratches, cracks, deformation and pollution on the surface of the outer casing, and there should be no rust and other mechanical damages on metal parts. (2) The parts of the product should be fastened without loosening. (3) The length of the optical fiber should meet the requirements, the surface should not be blistered, peeled, discolored or damaged, and the termination should be clean and free from looseness.