These polarization-maintaining fiber optic patch cables are terminated on both ends with narrow key, ceramic-ferrule FC/APC connectors. Available from stock, these cables feature a high-quality polish, which leads to a typical return loss of 60 dB. Each cable is individually tested to ensure the specified extinction ratio and insertion. PANDA Polarization Maintaining (PM) fibres are designed with high performance properties including excellent birefringence and low attenuation. COM offers the broadest portfolio of PM fibres from wavelengths of 850nm, 1310nm, 1550nm to designs such as elliptical clad and bow-tie. The fiber is proof tested to 200 kpsi.