1. Product Title 3-Port PM Fiber Circulator – 1064 to 1650 nm 2. Product Overview GracyFiber PM Fiber Circulator is a 3-port polarization-maintaining optical component that routes light sequentially from Port 1 → Port 2 → Port 3 while suppressing backward propagation. Built with precision-aligned PM fiber, it is designed to preserve the polarization state while reducing back-reflection and optical crosstalk. 3. Key Features 3-port directional optical routing: Port 1 → Port 2