The 1: FIC_COUPLER_ 1x3 from Diamond SA is a Fiber Optic Coupler with Wavelength 1310 - 1550 nm, Directivity 55 dB, Insertion Loss 0.1 - 24.7 dB, Return Loss 55 dB, Polarization Dependent Loss typical 0.05 dB. More details for 1: FIC_COUPLER_ 1x3 can be seen below.