2×2 polarization-maintaining mechanical optical switch centered at the 1550 nm band. It delivers outstanding polarization-maintaining performance, high extinction ratio and superior crosstalk suppression, alongside fast switching speed and 3 V / 5 V low-voltage control. Featuring compact packaging and wide operating temperature range, this device is well-suited for polarization-sensitive optical path switching. Suitable for laboratory R&D, system monitoring, OADM systems, metropolitan area networks (MAN), as well as network security and monitoring.