Product features:Slow Axis Alignment、 Polarization-maintaining fiber with a pair of FC/APC connectors、 Wavelength range of 400-2200 nm、 Narrow key (2 mm) and slow axis alignment、 Typical 60 dB return loss、 Ceramic ferrule, 8° angle (APC)、 Ø3mm outer protective sleeve、 Custom patch. Product features:Slow Axis Alignment、 Polarization-maintaining fiber with a pair of FC/APC connectors、 Wavelength range of 400-2200 nm、 Narrow key (2 mm) and slow axis alignment、 Typical 60 dB return loss、 Ceramic ferrule, 8° angle (APC)、 Ø3mm outer protective sleeve、 Custom patch. These polarization-maintaining fiber optic patch cords feature high-quality, narrow-key ceramic FC/APC connectors on both ends. Produced by our equipment, each patch cord is individually tested at the test wavelength specified in the specification label, ensuring extinction ratio and low back. Thorlabs offers Polarization-Maintaining (PM) Single Mode Fiber Optic Patch Cables with a variety of connector options, including FC/PC, FC/APC, and hybrid FC/PC to FC/APC cables. This patch cord is 1 meter long with FC/APC connectors at both ends. Polarization Maintaining Patch-cord (Polarization Maintaining jumper) have orthogonal “slow” and “fast” axes.