The Ultra-Low Splitting Ratio Coupler from Opneti is a Fiber Optic Coupler with Optical Power 0.5 mW, 1 mW, 3 mW, 5 mW, Excess Loss 0.05 dB, Insertion Loss 30 to 50 dB, Bandwidth ±20 nm, Wavelength 780 nm, 850 nm, 980 nm, 1064 nm, 1310 nm, 1550 nm, 1570 nm, 1625 nm, 2000 nm. More details for Ultra-Low Splitting Ratio Coupler can be seen below.