Optical fiber couplers 1. Input / output connector: fc/pc; fc/apc; lc/pc; mu/pc; sc/pc; sc/apc 2. Fiber length: 1: 1 m; 1.5: 1.5 m (customized) 3. Fiber type: 2: bare fiber, 9: 0.9mm loose tube, 3.0: 3.0mm cable 4. Coupling ratio: 01: 1: 99, 02: 2: 98, 50: 50: 50 5. Central wavelength: 13: 1310nm, 15: 1550nm 6. Port: 12: 1*2, 22: 2*2 7. Grade: p or a.