The PLCS-14-9/125-S-1250/1650-25-50-X-1-1 from OZ Optics Ltd. is a Fiber Optic Coupler with Excess Loss <1.25 dB, Wavelength 1250 to 1550 nm, Directivity >50 dB, Return Loss >50 dB, Polarization Dependent Loss 0.2 dB. More details for PLCS-14-9/125-S-1250/1650-25-50-X-1-1 can be seen below.