The Polarization-Maintaining Pigtailed Optical Isolator is a passive device which allows light to travel through a fiber in a single direction. Each optical isolator is available in a one fiber connection (Single Stage) or two connections (Dual Stage).
According to Jeff Harvey, Engineer at Edmund Industrial Optics, "By using the Polarization-Maintaining Pigtailed Optical Isolator, most reflections and scattering of light in the reverse direction are terminated with little or no effect on the polarization state of the input light. A single stage or dual stage isolator is critical in applications where one needs to minimize or remove back reflections."
Both Single and Dual Stage versions make use of standard Corning SMF optical fiber which has a 900 micron tight buffer fiber type.
Pigtailed Optical Isolator prices range from $915.00 to $1,226.00.