The 1×1 780nm Polarization Maintaining (PM) Opto-Mechanical Bi-Directional Optical Switch is a high-precision fiber optic switch designed for applications requiring stable polarization state transmission at a 780nm wavelength. It utilizes an opto-mechanical switching mechanism to control bidirectional optical signal transmission between a single input and output port, ensuring low insertion loss and high reliability. The PM feature preserves the polarization state during switching, making it ideal for applications such as quantum optics, atomic physics experiments, fiber optic sensing, and precision optical testing.