The OC Series 850nm MM Optical Circulators are non-reciprocal devices that redirect light at 850nm from port to port in only one direction while minimizing back reflection and back scattering in the reverse directions for any state of polarization. With Agiltron's special magnetic optics technology. Multimode 850 nm Fiber Optic Transmitters, Receivers, Transceivers are available at Mouser Electronics. If the signal is input from port 1, it will be output from port 2; if the signal is input from. ACP's Multimode optical circulator utilizes proprietary designs and metal bonding micro optics packaging. It provides low insertion loss, broad band high isolation, low PDL, excellent temperature stability and optical path epoxy free.