The FIC_COUPLER_ 2x2 from Diamond SA is a Fiber Optic Coupler with Wavelength 1310 - 1550 nm, Directivity 60 dB, Insertion Loss 0.1 - 24.7 dB, Return Loss 60 dB, Polarization Dependent Loss typical 0.05 dB. More details for FIC_COUPLER_ 2x2 can be seen below.