The SSC_COUPLER-1x4 from Diamond SA is a Fiber Optic Coupler with Wavelength 1310 ± 5 um, 1550 ± 5um or 1625 ± 5 um, Directivity 55 dB, Insertion Loss 7.1 dB, Return Loss 55 dB, Polarization Dependent Loss typical 0.05 dB. More details for SSC_COUPLER-1x4 can be seen below.