Available with a center wavelength of 1064, 1310 (O-Band), or 1550 nm (C-Band), these circulators are fast axis blocked and hence are designed to work with light that is launched into the slow axis. Offered are circulators with no connectors, FC/PC connectors, or FC/APC. Thorlabs' Polarization-Maintaining (PM) Optic Circulators are non-reciprocating, unidirectional, three-port devices that are used in a wide range of optical setups. They perform a similar function as an isolator, protecting the input fiber from return power, but also allowing the. LBTEK's fiber optic circulator is a three-port non-reciprocal optical device where light can only propagate in one direction, equipped with polarization-maintaining fiber, suitable for polarization-maintaining optical systems. This polarization maintaining (PM) device provides low insertion loss, high power, high isolation, high return loss, excellent environmental stability and polarization preservation.
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