SKU: PERM
The PERM is a benchtop polarization extinction ratio meter designed for precise measurement of polarization extinction ratio (PER) and polarization angle in polarization-maintaining (PM) fibers, making it ideal for testing PM components and connectors. It supports wavelength ranges from 400 nm to 2500 nm and features a front-panel connection port compatible with FC/PC (narrow- and wide-key), FC/APC (narrow- and wide-key), LC/PC, and SC/PC connectors, with adaptors. Additionally, it has an adaptor option for measuring bare fibers. A push-button operation initiates measurements, displaying PER and misalignment angle, while USB connection enables remote operation and data recording via a user-friendly GUI.
The PERM operates using a rotating polarizer in front of a photodiode detector. The photodiode measures input light intensity as a function of the polarization axis alignment between the rotating polarizer and the input light. A peak optical power is detected when the rotating polarizer aligns with the input polarization axis, while a minimum power is detected when the axes are perpendicular. The ratio of these two values determines the polarization extinction ratio. Unpolarized or circularly polarized light results in a low extinction ratio near 1, indicating minimal linear polarization contrast.
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